Ali Sepehri; Roya Abasi; Afshin Karami
Abstract
In order to evaluate the effect of salicylic acid on yield and yield components of bean genotypes under water deficit stress, an experiment was carried out as a factorial split plot design with three replications in research farm Bu Ali-Sina University (Hamadan, Iran) during 2009. Stress levels: consist ...
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In order to evaluate the effect of salicylic acid on yield and yield components of bean genotypes under water deficit stress, an experiment was carried out as a factorial split plot design with three replications in research farm Bu Ali-Sina University (Hamadan, Iran) during 2009. Stress levels: consist of vegetative water stress, reproduction water stress and without water stress (control) and three bean genotypes (‘Akhtar’, ‘D81083’ and ‘KS31169’) allocated in the main plots and three concentrations of salicylic acid 0, 0.5 and 1 mM to the sub-plots. Based on results the treatments had significant effects on plant height, number of branches, pod number per plant, seeds per pod, 100 seed weight, biological yield, grain yield and harvest index. Vegetative and reproductive drought stresses reduced grain yield but foliar application of Salicylic acid improved the growth and yield of bean. Utilizing salicylic acid in vegetative and reproductive stages improved the grain yield 17.2 and 16.8 percent, respectively. Such this result observed for biological yield too. Totally this research showed that between the genotypes of experiment, the ‘D81083’ and ‘Akhtar’ genotypes had higher grain yield and harvest index compared to ‘KS31169’. Foliar application of salicylic acid not only improved the growth and yield in no-stress condition but also for adjusting the drought stress especially at vegetative stress is recommended
Farrokh Omidi; Ali Sepehri
Abstract
In order to study of Sodium Nitroprusside(SNP) application effect on growth indices and water use efficiency of kidney beans cultivars(Akhtar and Derakhshan) under water deficit stress, an experiment was conducted in split factorial based in randomized complete block design with three replications in ...
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In order to study of Sodium Nitroprusside(SNP) application effect on growth indices and water use efficiency of kidney beans cultivars(Akhtar and Derakhshan) under water deficit stress, an experiment was conducted in split factorial based in randomized complete block design with three replications in Bu-Ali Sina university research field at 2012. Water stress treatments included vegetative stress, reproductive stress, vegetative+reproductive stress and non-water stress (control). Foliar application of SNP was done in 3 concentration(0, 150 and 300 µM SNP). Reproductive stress reduced leaf area, crop growth rate and total dry weight in both cultivars. SNP foliar application (300 µM) increased mentioned indices 28, 26 and 20 percent in Akhtar and 28, 20 and 20 percent in Derakhshan in comparison to without foliar application, respectively. Water use efficiency of grain and water use efficiency of biomass in vegetative stress was more than of non-water stress. Maximum amount of water use efficiency was for Akhtar cultivar with 300 µM Sodium Nitroprusside foliar application and were 0.72 and 2.9 percent for grain and biomass, respectively. SNP foliar application ameliorated and improved negative effects of vegetative and reproductive stress. SNP application(300 µM) had more effect on growth and yield in both cultivars at all water regimes. Therefore, foliar SNP(300 µM) it’s desirable for kidney bean under water deficit stress.
Mahmoud Reza Tadayon; Saeid Norouzi
Abstract
Effect of nano titanium oxide, nano zinc and multiwall carbon nano tube on yield and yield components of green gram was carried out in Kohkiloyeh-Boyrahmad province, Iran with 30 degrees 45' N and 50 degrees 44' in 2013 growing seasons. The experiment was arranged as factorial ...
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Effect of nano titanium oxide, nano zinc and multiwall carbon nano tube on yield and yield components of green gram was carried out in Kohkiloyeh-Boyrahmad province, Iran with 30 degrees 45' N and 50 degrees 44' in 2013 growing seasons. The experiment was arranged as factorial in a completely randomize block design with three replications, treatments including: four concentrations (zero, 50, 100 and 200 mg/l) of above nano particles, were spraying on green gram plants at 4-2 leaf, 8-6 leaf stages and pod stage. The results showed all of nano particle treatments had significant effect on some yield components of green gram plants. Concentrations of multiple carbon nano tube at 50, 100 and 200 mg/l had significant effect on number of pod/plant, seed thousand weight and biological yield, also nano titanium oxide at 50 mg/l had positive effect on grain yield. The harvest index, the number of grain/pod and seed protein percent was higher under 50 and 200 mg/l of nano zinc treatments. In conclusion, the spraying of 50 mg/l of above nano particles had the highest effect on yield and its components of green gram.
Esmaeil Rezaei-chiyaneh; Sorour Khorramdel; Parisa Garachali
Abstract
To evaluate the yield components, yield and land equivalent ratio affected by relay intercropping of sunflower (Helianthus annuus L.) with faba bean (Vicia faba L.), a field experiment was arranged based on a randomized complete block design with three replications at the Agricultural Research Station ...
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To evaluate the yield components, yield and land equivalent ratio affected by relay intercropping of sunflower (Helianthus annuus L.) with faba bean (Vicia faba L.), a field experiment was arranged based on a randomized complete block design with three replications at the Agricultural Research Station Payamenoor University of Nagadeh, Iran during growing reason of 2012-2013. The treatments included row intercropping )one row of sunflower + one row of faba bean(, strip intercropping )two rows of faba bean + four rows of sunflower, four rows of faba bean + two rows of sunflower, three rows of faba bean + three rows of sunflower( and monoculture faba bean and sunflower. The results indicated that the relay intercropping patterns had significant effect on studied traits of sunflower and faba bean (except number of seed per pod of faba bean). The highest seed yield of sunflower (4140 kg/ha) and faba bean (2567.33 kg/ha) were obtained from row intercropping and the lowest seed yield of sunflower (3136.67 kg/ha) and faba bean (1957 kg/ha) were obtained in their monoculture. The oil percentage of all intercropping treatments was higher than monoculture. The maximum land equivalent ratio (1.85) and actual yield loss (1.74) were calculated in row intercropping and the highest intercropping advantage (1.25) was achieved in four rows of faba bean + two rows of sunflower. The results showed that the use of relay intercropping results in better utilization of environmental resources and increased crop production compared to monoculture of the same species.
Avishan Taherkhanchi; Gholam Ali Akbari; Seyed Ali Mohammad Modarres-Sanavy; Majid Ghorbani Javid
Abstract
To evaluate the effect of bio-fertilizers on physiological traits in soybean under water deficit condition, agreenhouse experiment was conducted in 2011, at faculty of Agriculture, Tarbiat Modares University,using a factorial design based on RCBD with three replications. The experimental treatments weredifferent ...
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To evaluate the effect of bio-fertilizers on physiological traits in soybean under water deficit condition, agreenhouse experiment was conducted in 2011, at faculty of Agriculture, Tarbiat Modares University,using a factorial design based on RCBD with three replications. The experimental treatments weredifferent irrigation regimes including non-stress (40% water depletion), moderate stress (60% waterdepletion) and severe stress (80% water depletion) and four methods for application of mixed ofAzotobacter and Azosperilium on plant or seed. Results showed that the highest yield and yieldcomponents were observed in non-stress and spraying of bacteria on leaf + seed inoculation conditions.The highest catalase enzyme activity was observed in moderate stress and seed inoculation + spraying ofbacteria on leaf condition. In addition, the highest proline content was showed in severe stress and nonbacterialinoculation and was three times more than the minimum treatment. The results generallyindicated that using bio-fertilizer in moderate stress can reduce the destructive effects of stress anddecrease of yield, but severe stress led to increase of cost of production and could not effect on increasingof yield significantly.
Mahmoud Ghorbanzadeh Neghab; Hamid Reza Babaie; Ghorbanali Rassam; Ali Reza Dadkhah; Asghar Khoshnood Yazdi
Abstract
To study the response of yield,yield components,protein and oil content of soybean cultivars to delay in planting in Shirvan region, an experiment was conducted at Research Farm of the Faculty of Agriculture, Shirvan in 2010. In this study, nine soybean cultivars (Habit, Hack, Black Hack, Cencutry, Cloumbos, ...
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To study the response of yield,yield components,protein and oil content of soybean cultivars to delay in planting in Shirvan region, an experiment was conducted at Research Farm of the Faculty of Agriculture, Shirvan in 2010. In this study, nine soybean cultivars (Habit, Hack, Black Hack, Cencutry, Cloumbos, Clark, Sahar, Zane and Willams) were evaluated at different sowing dates (20 May, 4 June and 20 June) in factorial experiment based on randomized complete block design with three replications. The results indicated that yield components, protein content and grain yield significantly reduced by delay planting. The first planting (20 May) had the highest grain yield (2338 kg/ha). There were significant differences between soybean cultivars for grain yield and other traits except oil content. Zane cultivar had the highest grain yield. Sahar cultivar had the lowest grain yield due to the reduced harvest index, increase days to flowering and days to poding. The results indicated that delay in planting causes reduction in grain yield. Zane, Black Hack, and Hack cultivars had the highest grain yield in all planting dates.
Mahsa Zarei; Mahmoud Reza Tadayon; Ali Tadayyon
Abstract
In order to evaluate the yield components and oil percent of hemp plant under different biological fertilizer and saline water and soil, a field experiment was conducted as a factorial experiment in a randomized complete design with three replications in the North East of Esfahan in 2012. The experimental ...
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In order to evaluate the yield components and oil percent of hemp plant under different biological fertilizer and saline water and soil, a field experiment was conducted as a factorial experiment in a randomized complete design with three replications in the North East of Esfahan in 2012. The experimental treatments include, three hemp ecotypes of Esfahan, Shiraz and Mashاad as the first factor and fertilizer treatments of urea, nitroxin, super nitro-plus, bio-sulfur, mycorrhizae (Glomus mosseae) and control (without fertilizer) as the second factor, subjected to saline soil irrigation water. The traits of seed numbers per plant, 1000 seeds weight, grain yield, biological yield, harvest index and percent of seed oil were measured. The results showed the maximum grain yield and harvest index were belong to mycorrhizae treatment and the minimum was belong to control. Besides, mycorrhizae showed maximum biological yield and other treatments had not significantly effect. 1000 seeds weight was affected significantly under different fertilizer treatments, but the ecotypes of Mashhad and Shiraz showed maximum (13.33 gr.) and ecotype of Esfahan produced minimum (7.8 gr.) 1000 seeds grain. Each 4 fertilizer treatments caused significant promotion of oil percent (29.2%) compare to control (26.5%), but did not observed any significant effect between fertilizer treatments. Ecotype of Esfahan under bio-sulfur and mycorrhizae treatments with average of 800 seeds per plant had maximum and ecotypes of Mashhad and Shiraz had minimum of 76 seeds per plant.
Maryam Habibi; Majid Majidian; Mohammad Rabiei
Abstract
In order to investigate the effects of boron, zinc and sulfur on yield and fatty acid composition of rapeseed(Hyola 401 cultivar), an experiment was conducted in Rasht province in 2011. A field experiment withcompletely randomized block design was performed with eight treatments in three replications.Maximum ...
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In order to investigate the effects of boron, zinc and sulfur on yield and fatty acid composition of rapeseed(Hyola 401 cultivar), an experiment was conducted in Rasht province in 2011. A field experiment withcompletely randomized block design was performed with eight treatments in three replications.Maximum grain yield (4157.6 kg ha-1) and grain oil (1770.2 kg ha-1) was obtained from S+B+Zntreatments. The highest and lowest grain oil was obtained from S+B+Zn (42.58) and control (38.37),respectively. The maximum oleic acid (234.8 mg g-1) and linolenic acid (26.68 mg g-1) and linoleic acid(55.98 mg g-1) were obtained from B+Zn+S treatments. Maximum stearic and palmitic acid were obtainedfrom control and S+Zn treatments which was 6.5 and 15.53 mg g-1, respectively. Regarding to the results,fatty acids composition of rapeseed are influenced by nutrient and since quality of edible oils depends onunsaturated fatty acids, especially linoleic and linolenic acids and these acids are essential fatty acids forthe human body that must be supplied through diet. Therefor this research showed that we are not onlyable to increase oil yield with can also increase oil quality with increasing fatty acid composition.
mehrshad Barary; sajad kordi; Lotf Ali Gerami; Ali Hatami; Ali Ashraf Mehrabi; Fardin Ghanbari
Abstract
In order to investigate the impact of foliar Zn application in reducing the negative effects of water stress on bean growth and yield, a field experiment was carried out in the Research Field of Ilam University in 2011. The experiment was arranged in split factorial based on a randomized complete block ...
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In order to investigate the impact of foliar Zn application in reducing the negative effects of water stress on bean growth and yield, a field experiment was carried out in the Research Field of Ilam University in 2011. The experiment was arranged in split factorial based on a randomized complete block design with three replications. The experimental factors were water stress including water withholding at flowering, water withholding at pod formation and control (full irrigation) as main plot, and the factorial of Zn application levels including; 0, 2000 and 4000 ppm and two bean cultivars including; Akhtar and Dorsa as sub-plots. Results showed that water stress significantly reduced grain yield and the lowest grain yield obtained from water stress at flowering stage. The highest (3163.6 kg/ha) grain yield achieved by Zn application with 4000 ppm concentration. There was a significant difference between cultivars in different treatments and in overall Dorsa with 3846.4 kg/ha produced the highest grain yield. According to the results the most sensitive stage of bean plants to water stress is flowering stage and Zn application with a concentration of at least 4000 ppm can improve plant tolerance to water deficit.
sodabe norzad; Ahmad ahmadian; Mohammad Moghaddam; elham daneshfar
Abstract
To study the effect of drought stress during using organic and chemical fertilizers on morphological, agronomic traits and the essential oil of coriander, a field experiment was conducted as split plot based on randomized complete block design in three replications at Agricultural Research Station, College ...
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To study the effect of drought stress during using organic and chemical fertilizers on morphological, agronomic traits and the essential oil of coriander, a field experiment was conducted as split plot based on randomized complete block design in three replications at Agricultural Research Station, College of Agriculture, University of Torbat Heydarieh, Iran during growing season of 2010-2011. Treatments were consisted of three levels of drought stress (30, 60 and 90 percent FC) and fertilizer treatments [control, NPK (60: 60: 40), caw manure (25 ton/ha) and vermicompost (25 ton/ha)]. Different traits such as plant height stem diameter, number of branches, number of leaves per plant, fresh and dry weight, herbage yield and number of umbels per plant, number of seeds per umbel, total number of seeds in plant, fruit yield, 1000 seed weight and essential oil percentage and yield were recorded. Analysis of variance indicated that water stress and application of fertilizer treatment had significant effect on all studied trait. The maximum herbage yield (5371 kg/ha) and seed yield (3905 kg/ha) were achieved in 90 percent FC combined with NPK and mild stress under NPK treatment, respectively. The highest essential oil percentage (0.77 percent) and essential oil yield (18.49 kg/ha) were obtained in mild stress by using chemical fertilizers. According to the fact that application of fertilizers in mild stress conditions leads to increase in essential oils yield, using chemical fertilizers under mild drought stress is recommended for coriandering as a medicinal plant.
Ebrahim Zeinali; Afshin Soltani; Mohammad Khadempir; Mahmood Tourani; Fatemeh Sheikh
Abstract
Gorgan is one of the most important regions for faba bean (Vicia faba L.) production in Iran. However, there is no enough quantitative information about the various aspects of production management of this crop plant. To investigate the effects of inter-row spacing, cultivar and seeding date on the yield ...
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Gorgan is one of the most important regions for faba bean (Vicia faba L.) production in Iran. However, there is no enough quantitative information about the various aspects of production management of this crop plant. To investigate the effects of inter-row spacing, cultivar and seeding date on the yield of green pod and grain, this experiment was carried out at research farm of Gorgan University of agricultural sciences in 2011-2012 growing season. The experimental design was a randomized complete block design as split-plot factorial with four replications. Inter-row spacing (30, 45 and 60 cm) and factorial of planting dates (15 Nov. and 23 Dec. 2011) and cultivars (Barakat and French) were arranged in main- and sub-plots, respectively. The results indicated non-significant effect of cultivar and the significant (P = 0.01) effects of seeding date, inter-row spacing and their interactions on the grain, green pod and biological yields, and pod number per plant, while the effects of cultivars were not significant, statistically. Based on the obtained results, any increase in inter-row spacing or delaying in planting of faba bean will reduce the grain, green pod and biological yields. The maximum yield of green pods and grain yield (21753 and 4530 kg ha-1, respectively) produced in normal planting date (15 Nov.) and 30 cm inter-row spacing. In contrast, the lowest grain and green pod yield (2527 and 13041 kg ha-1, respectively) obtained from delayed planting date (23 Dec.) and 60 cm inter-row spacing.
Farhad Azizi; Ali Mahrokh
Abstract
In order to comparison and determination of the best drought tolerance indices in sweet corn hybrids, an experiment was conducted using a randomized complete block design in split plot lay out with three replications at Seed and Plant Improvement Institute in Karaj in 2006. Three irrigation levels (irrigation ...
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In order to comparison and determination of the best drought tolerance indices in sweet corn hybrids, an experiment was conducted using a randomized complete block design in split plot lay out with three replications at Seed and Plant Improvement Institute in Karaj in 2006. Three irrigation levels (irrigation after 75 as control, 100 and 125 millimeters cumulative evaporation from class A evaporation pan) were assigned as main plots and 12 sweet corn hybrids include KSC403su, Chase, Esquire, Rival, Reveille, Diva, Shimmer, Shaker, PS107, Golda, Royalty and Rana were considered as sub plots. Mean Productivity (MP), Tolerance Index (TOL), Geometric Mean Productivity (GMP), Stress Susceptibility Index (SSI), Stress Tolerance Index (STI) were used to evaluate tolerance or sensitivity to drought stress of the hybrids. STI and GMP indices had a positive and significant correlation with grain yield in non-stress and stress conditions (mild and severe stress treatments). STI and GMP indices showed that Hybrids Diva and Golda had optimum yield in non-stress condition but their yield decreased in severe stress condition. Hybrids KSC403su, Esquire, Shimmer and Shaker had low yield in non-stress but they had suitable yield in severe stress condition. Hybrids Chase, Rival and Reveille had low yield in non-stress and severe stress conditions. Hybrids PS107, Royalty and Rana had optimum yield in both non-stress and stress condition. Therefore, they can be recommended to use in stress and optimum conditions.
Alireza Behdadian; Afshin Soltani; Ebrahim Zeinali; Hossein Ajam Norouzi; Hassan Masoumi
Abstract
To evaluate the effects of nitrogen management at yellow budding stage on seed yield with using nitrogen nutrition index (ratio of nitrogen concentration in the plant to optimum concentration), of rapeseed farms in Gorgan, an experiment was conducted as a nested model arranged in a complete randomized ...
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To evaluate the effects of nitrogen management at yellow budding stage on seed yield with using nitrogen nutrition index (ratio of nitrogen concentration in the plant to optimum concentration), of rapeseed farms in Gorgan, an experiment was conducted as a nested model arranged in a complete randomized design (CRD) in 2010. Fifteen rapeseed fields were classified at three levels of management (optimum, middle, weak). During the experiment, questionnaires were completed by farmers for quantification of agricultural management. The results showed that levels of management are significantly difference from nitrogen nutrition index (NNI) (P<0.01). Although quantities of nitrogen nutrition index (NNI) were higher in optimum level of management than the middle and weak levels, but at all management levels during the growing season, the index was less than one. This indicates restriction in development and production due to nitrogen deficiency. Nitrogen nutrition index in yellow budding stage have, significant positive correlation (P<0.05) with seed yield, and confirmed importance of access to nitrogen sources in yellow budding stage.
Khadijeh Roustaie; mohsen Movahhedi Dehnavi; Seyed Ali Khadem; Hamid Reza Owliaie
Abstract
To investigate effects of different super absorbent polymer and animal manure ratios on the quantitative and qualitative characteristics of soybean under drought stress, a split plots experiment was conducted based on randomized complete block design with three replications in Marvdasht, Iran in 2009. ...
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To investigate effects of different super absorbent polymer and animal manure ratios on the quantitative and qualitative characteristics of soybean under drought stress, a split plots experiment was conducted based on randomized complete block design with three replications in Marvdasht, Iran in 2009. Main factor included of irrigation with 50, 100 and 150 mm evaporation from pan class A and sub factor included of control, 40 t.ha-1 animal manure, 200 kg.ha-1 super absorbent polymer, 50 percent super absorbent polymer + 50 percent animal manure, 65 percent super absorbent polymer + 35 percent animal manure and 35 percent super absorbent polymer + 65 percent animal manure. The results showed that, number of pod and grain per plant, 1000 grain weight, grain yield, biological yield, protein yield and oil yield were decreased by drought stress occurrence and were increased with super absorbent polymer and animal manure application. The highest yield (2148.3 kg.ha-1) was obtained in control treatment. Results showed that the combinations of super absorbent polymer and animal manure significantly increased grain, biological, oil and protein yield compared with control. Finally, combination of 35 percent super absorbent polymer and 65 percent animal manure was the best treatment in this experiment.
Masuod Bakhshayeshi Geshlagh
Volume 13, Issue 2 , March 2012, , Pages 41-49
Abstract
In order to study adapatability and yield stability of irrigated bread wheat cultivars Alvand, Alamout, Zarrin, Navid, Azar 2, Sabalan, Omid and Bezostiya this experiment was conducted in RCBD during three cropping seasons (2007-2010) in six cities. Simple ANOVA and combined analysis of variance for ...
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In order to study adapatability and yield stability of irrigated bread wheat cultivars Alvand, Alamout, Zarrin, Navid, Azar 2, Sabalan, Omid and Bezostiya this experiment was conducted in RCBD during three cropping seasons (2007-2010) in six cities. Simple ANOVA and combined analysis of variance for three years in every location and also combined analysis of variance for three years and six locations were implemented. Lin and Binns parameter, environmental variance, Rick Ecovalance method and Shukla stability variance were used for determination of stable cultivars. Results of combined ANOVA (three years × six locations) showed that interaction effect of year × location × genotype was significant. The highest and lowest grain yield belonged to Alvand (3/74 tha1) and Azar 2 (2/72 tha1) cultivars. Results of stability analysis with Lin and Binns method showed that Zarrin cultivar had the lowest inside location variance for grain yield and the lowest environmental variance belonged to Azar 2 cultivar. Results of stability analysis with Shukla Stability variance method showed that Zarrin and Sabalan cultivars had the lowest Shukla stability variance, respectively. Also results of Rick Ecovalance method showed that Zarrin cultivar had the highest amount for this parameter. Zarrin and Sabalan cultivars had the lowest yield stability and can be recommended for studied locations.
Raouf Seyed sharif; Mir Naser Seyyedi; Mohammad Zaefizadeh
Volume 13, Issue 2 , March 2012, , Pages 51-60
Abstract
To evaluate the effect of various levels of nitrogen fertilizer on nitrogen use efficiency and grain yield of canola cultivars, a split plot experiment based on randomized complete block design was conducted in 2007. Factors were: nitrogen fertilizer at four levels (zero, 50, 100 and 150 kg/ha) in the ...
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To evaluate the effect of various levels of nitrogen fertilizer on nitrogen use efficiency and grain yield of canola cultivars, a split plot experiment based on randomized complete block design was conducted in 2007. Factors were: nitrogen fertilizer at four levels (zero, 50, 100 and 150 kg/ha) in the main plots and canola cultivars at three levels (‘Clover’, ‘Opera’ and ‘Okape’) in the sub plots. The results showed that the effects of cultivar and nitrogen levels were significant on grain yield, grain per plant, pod per plant, grain 1000 weight, harvest index and plant height. The interaction effects of cultivars in nitrogen levels were significant on grain yield, grain per plant, pod per plant and plant height. Means comparison showed that with increasing nitrogen levels, grain yield increasing. Response of canola cultivars was different to grain yield. The highest grain yield (1.18 ton/ha) was obtained in Opera cultivar and the least (0.78 ton/ha) of it was in Okape cultivar. Means comparison showed that the highest grain yield, grain per plant, pod per plant and plant height was obtained by the plots which applied 150 kg N/ha with Opera cultivar and the least of it was in Okape cultivar without nitrogen application. However, application of 100 and 150 kg N/ha had similar grain yield in Opera cultivar. Nitrogen use efficiency was significantly as affected by cultivar, nitrogen levels and cultivar × nitrogen levels. Means comparison showed that with increasing of nitrogen, decreased nitrogen use efficiency. Response of canola cultivars was different with nitrogen use efficiency. Maximum nitrogen use efficiency (5.26 kg/kg) was obtained in the plots which 100 kg nitrogen ha-1 with Opera cultivar was used and minimum (2.64 kg/kg) was obtained in the plots which 150 kg nitrogen ha-1 with okape cultivar was used.
Mehdi Zarrabi; Iraj Allah dadi; Gholam Abbas Akbari; Hamid Iran najad; Gholam Ali Akbari
Volume 12, Issue 2 , November 2010, , Pages 37-50
Abstract
To study the seprate and combined effects of phosphorus fertilizer, Phosphate-solubilizing bacteria and mycorrhizal fungus on reducing drought stress damages of grain corn (SC704) during its vegetative stages under field conditions, an experiment was conducted as split plot based on RCBD with three replications ...
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To study the seprate and combined effects of phosphorus fertilizer, Phosphate-solubilizing bacteria and mycorrhizal fungus on reducing drought stress damages of grain corn (SC704) during its vegetative stages under field conditions, an experiment was conducted as split plot based on RCBD with three replications at College of Abouraihan, University of Tehran in 2009. Experimental factors were drought stress as main-plot (irrigation after 50 as control, 100 and 150 mm evaporation from pan class A) and fertilizer plus biofertilizer compounds as sub-plots. Drought stress began after seedling stage. Analysis of variance showed that drought stress significantly affected most of investigated traits such as number of row/ ear, number of kernel/ row, ear weight, 1000kernel weight and grain yield. All the measured traits in compounds phosphate-solubilizing bacteria, mycorrhiza fungies and triple super phosphate treatment were higher than other treatments under water deficit stress conditions. Frthermore, grain yield in triple super phosphate treat under severe water deficit stress conditions (1.81 ton/ha) were significantly less than normal irrigation (8.38 ton/ha) and low stress conditions (4.98 ton/ha). According to this experiment, seed inoculation with phosphate-solubilizing bacteria, mycorrhiza fungies and triple super phosphate compounds affected grain yield and harvest index significantly. This experiment showed that phosphate-solubilizing microorganisms can positively interact in promoting plant growth as well as in P uptake in maize plant, leading to improve plant tolerance under water deficit stress conditions.
Masoumeh Naeimi; Gholam Ali Akbari; Amir Hossein Shirani rad; Seyed Ali Mohammad Modarres-Sanavy; Seyed Ahmad Sadat nouri
Volume 12, Issue 2 , November 2010, , Pages 63-71
Abstract
To evaluate the drought stress effect at terminal growth stage on yield of 12 rapeseed cultivars, an experiment was conducted with split-plot arrangement based on randomized complete block design with four replications at experimental field of Seed and Plant Improvement Institute, Karaj-Iran during 2005-06. ...
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To evaluate the drought stress effect at terminal growth stage on yield of 12 rapeseed cultivars, an experiment was conducted with split-plot arrangement based on randomized complete block design with four replications at experimental field of Seed and Plant Improvement Institute, Karaj-Iran during 2005-06. Irrigation at two levels (irrigation after 80 mm evaporation from class A pan, as control and withholding irrigation from silique formation until crop maturing time, as stress conditins allowcated to main plots and twelve rapeseed cultivars were used in sub plots. The number of silique in main stem, number of silique in lateral branches, silique fertility ratio and grain yield were low in drought stress conditions (p< 0.05). There were significant variations in all studied traits between evaluated cultivars. Grain yield in drought stress treatment was decreased (30%), when silique abortion was occurred due to water stress. In full irrigation treatment (control), the grain yield of Orient cultivar (2817 kg.ha-1) and at drought conditions, the grain yield of Opera cultivar (2058 kg.ha-1) were the highest amounts. The lowest oil percentage (39.8) and the highest protein percentage (23.3) were for Talaye cultivar, while the highest oil percentage (42.6) was for Option500 cultivar.
Ahmad Jafari; Mehrdad Mahlooji
Volume 12, Issue 1 , May 2010, , Pages 21-27
Abstract
In order to selection of superior cold tolerant barley genotypes for cold regions of Esfahan province, this study was conducted with nine barley varieties/lines in Fereidan area, and in two successive years (2002-2004). The research was carried out in on-farm pattern experiment and in a CRB design. Results ...
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In order to selection of superior cold tolerant barley genotypes for cold regions of Esfahan province, this study was conducted with nine barley varieties/lines in Fereidan area, and in two successive years (2002-2004). The research was carried out in on-farm pattern experiment and in a CRB design. Results showed that grain yield and some of yield components affected by year, variety and their interactions, significantly. Positive and significant correlation observed between grain yields and numbers of spikes per square meter. Changes of numbers of spikes per square meter were main cause of grain yield variations. Grain yields correlated with thousand kernel weight, negatively and significantly. The grain yield of CB-74-2 barley line was the highest in all years, significantly. Also, the grain yield of IFN-12 and IFN-13 barley lines, selected from Esfahan province’s local varieties, were significantly higher than check variety (Makooii).
Davud Afyuni; Ali Reza Marjovvi
Volume 11, Issue 2 , November 2009, , Pages 1-10
Abstract
In order to evaluate salinity tolerance of six bread wheat varieties, an experiment was conducted during 2000-02 crop seasons in Roudasht Salinity Research Station, Esfahan. Effects of three levels of irrigation water salinities (four, eight and 12 dS m-1) were studied on six bread wheat cultivars including ...
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In order to evaluate salinity tolerance of six bread wheat varieties, an experiment was conducted during 2000-02 crop seasons in Roudasht Salinity Research Station, Esfahan. Effects of three levels of irrigation water salinities (four, eight and 12 dS m-1) were studied on six bread wheat cultivars including Pishtaz, Shiraz, Mahdavi, Marvdasht, Kavir and Roshan. Increase in salinity level of irrigation water caused significant decrease in grain yield, number of spikes per m2, days to physiological maturity, plant height and grain filling period. Among the varieties, Roshan and Shiraz had the minimum reduction percentage in grain yield in 12 dS m-1 compared to 4 dS m-1. In 12 dS m-1, Roshan and Shiraz produced 3987 and 3607 kg ha-1 grain yield, respectively and had the highest grain yield values among the varieties. Roshan also had the highest amounts of MP, GMP and STI (4257, 4248 and 1.20, respectively) and the lowest amounts of Tol and SSI (539 and 0.66, respectively), thus was the most tolerant cultivar to salinity among the studied cultivars. Based on the tolerance and susceptibility indices, Marvdasht was the most susceptible cultivar to salinity.