zahra ajribzadeh; salim farzaneh; Mahmoud Shomili; Hamid Reza Balouchi; aziz Ker Mullah Chaab; Raouf Seyed Sharifi
Abstract
This study was performed to investigate the effect of four types of binders at different levels: carboxymethylcellulose (40, 60 and 80 g/l), arabic gum (50, 100 and 150 g/l), tragacanth (30, 60 and 90 g/l) and starch (45, 60 and 75 g/l) as the first test and four types of nutrients with different levels: ...
Read More
This study was performed to investigate the effect of four types of binders at different levels: carboxymethylcellulose (40, 60 and 80 g/l), arabic gum (50, 100 and 150 g/l), tragacanth (30, 60 and 90 g/l) and starch (45, 60 and 75 g/l) as the first test and four types of nutrients with different levels: humic acid (6, 9 and 12 g/l), filter cake ( 5, 10 and 15 g/kg), superabsorbent (10, 30 and 45 g/kg) and microcombi fertilizer (10, 20 and 30 g/kg) as the second experiment with control in a completely randomized design with 3 replications In 2020, in Khuzestan-Iran sugarcane research station. The results showed that the effect of four types of binder on sugarcane plant characteristics such as germination rate, stem length, stem dry weight and plant moisture content was significant and the most positive effect was observed in starch gum (60 g/l). Also, four nutrients had a significant effect on some characteristics such as germination rate, stem length, stem dry weight and plant moisture content. The most positive effect for characteristics was observed in humic acid (12 g/l). Due to the most positive effect of starch gum, in later studies, this glue can be used as a binder, along with other nutrients and fillers for planting lateral buds of sugarcane stems to produce artificial single-seeded sugarcane seeds.
Raouf Seyed sharif; reza seyed sharifi
Abstract
In order to study the effects of nitrogen starter, putrescine, and nano silicon on yield and some physiological and biochemical traits of rainfed chickpea (Cicer arietinum L.), an experiment was carried out as factorial based on randomized complete block design with three replications in a farm near ...
Read More
In order to study the effects of nitrogen starter, putrescine, and nano silicon on yield and some physiological and biochemical traits of rainfed chickpea (Cicer arietinum L.), an experiment was carried out as factorial based on randomized complete block design with three replications in a farm near Ardabil in 2021. The experiment factors include nitrogen starter (no-nitrogen starter, application of 20 and 40 kg.ha-1 by urea), putrescine foliar aplication (foliar application with water, application of 0.5 and 1 mM putrescine), and nano silicon (foliar application with water, application of 25 and 50 mg.L-1). Means comparision show that the highest level of nano silicon, putrescine, and nitrogen starter have increased chlorophyll a, chlorophyll b, total chlorophyll, and proline content (139%, 137%, 138%, and 80%, respectively), compared to no application of nano silicon, putrescine, and starter nitrogen. The highest level nano silicon and putrescine has increased the activity of catalase, peroxidase enzymes and grain yield (40%, 16.3%, and 16.6%, respectively), compared to no application of nano silicon and putrescine. Maximum quantum yield of photosystem II (7.4%, 8%, and 15.5%, respectively) and the activity of polyphenol oxidase enzyme (17%, 9%, and 21%, respectively) are obtained at the highest level starter nitrogen, putrescine, and nano silicon. It seems that the application of nano silicon, putrescine, and starter nitrogen can increase grain yield of chickpea under rainfed condition as it improves physiological and biochemical traits.
Zhila Nazari; Raouf Seyed sharif; Hamed Narimani; Sara Mohammadi Kale Sarlou
Abstract
In order to study the effects of water limitation, biofertilizers and nanosilicon on compatible osmolytes and biochemical traits of triticale, an experiment as factorial was conducted based on randomized complete block design with three replications in research greenhouse faculty of Agriculture and Natural ...
Read More
In order to study the effects of water limitation, biofertilizers and nanosilicon on compatible osmolytes and biochemical traits of triticale, an experiment as factorial was conducted based on randomized complete block design with three replications in research greenhouse faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabil during 2020. The experimental factors were included irrigation at three levels (full irrigation as control; irrigation withholding at 50% of heading as moderate water limitation and irrigation withholding at 50% of booting stages as severe water imitation), application of bio fertilizers (no application of bio fertilizers as control, application of vermicompost, Mycorrhiza, both application vermicompost and Mycorrhiza), foliar application of nano silicon (foliar application with water as control and foliar application of 2 g.L-1 nano silicon). The results showed that both application of vermicompost, Mycorrhiza and foliar application nano silicon under irrigation withholding in booting stage, increased the activity of catalase, polyphenol oxidase enzymes, proline and soluble sugar content (49.17, 50.64, 44.92 and 52.22% respectively) compared to no application of bio fertilizers and nano silicon under normal irrigation condition. Also, both application of vermicompost, Mycorrhiza and foliar application of nano silicon in normal irrigation condition decreased hydrogen peroxide and malondialdehyde content (55.34 and 53.64% respectively) and grain yield increased 59.52% compared to no application of bio fertilizers and nano silicon under irrigation withholding in booting stage condition. It seems that the application of biofertilizers and nano silicon can increase grain yield triticale under water limitation due to improving the biochemical traits.
Ghobad Mohamadpoor; salim farzaneh; SAEID KHOMARI; Raouf Seyed sharif; behrooz esmaie;pour
Abstract
This study attempts to investigate the effect of application of humic acid and seaweed extract on morphology, growth, yield, and yield components of quinoa under drought stress in 2018-2019 in two different locations, Qasr Shirin and Dalahou. It has been performed as split plots in a randomized complete ...
Read More
This study attempts to investigate the effect of application of humic acid and seaweed extract on morphology, growth, yield, and yield components of quinoa under drought stress in 2018-2019 in two different locations, Qasr Shirin and Dalahou. It has been performed as split plots in a randomized complete block design with 4 replications. Experimental treatments include three irrigation treatments (full irrigation, irrigation cut-off at the beginning of flowering and irrigation cut-off at the beginning of seed filling) and foliar spraying treatments with different amounts of humic acid (foliar application at the rate of 1.5 kg / ha and 2 Kg / ha) and seaweed extract (foliar application at 1 kg / ha and 1.5 kg / ha) along with a control treatment. Results show that seed yield in Dalahou region under normal condation has been 24.78% higher than Qasrshirin region. Seed yield in different irrigation treatments under the influence of foliar application show that in all irrigation treatments, the effect of foliar application of humic acid and seaweed extract on seed yield has been positive compared to the control. In full irrigation conditions, the highest seed yield is obtained from foliar application of humic acid, while in irrigation cut-off treatments, the effect of seaweed extract on seed yield has been better than humic acid. The weight of 1000 seeds in quinoa produced in Dalahu region has been more than Qasrshirin region but in both regions drought stress has reduced the 1000 seeds weight. In all irrigation treatments, application of humic acid and algae extract has increased 1000-seed weight.
Hamed Narimani; Raouf Seyed sharif; fatemeh aghaei
Abstract
In order to study the effect of foliar and soil application of Zinc on grain weight and some biochemical traits of wheat (Triticum aestivum L.) under soil salinity, an experiment has been conducted as factorial based on randomized complete block design with three replications in research greenhouse of ...
Read More
In order to study the effect of foliar and soil application of Zinc on grain weight and some biochemical traits of wheat (Triticum aestivum L.) under soil salinity, an experiment has been conducted as factorial based on randomized complete block design with three replications in research greenhouse of University of Mohaghegh Ardabili in 2018-2019. Experimental factors include soil salinity levels [control and salinity of 30, 60, and 90 mM] and four methods of zinc application [no zinc as control, soil application zinc as ZnSO4, foliar application nano zinc oxide, and combination of soil and foliar application of zinc]. Results show that both application of ZnSo4 and foliar application nano Zn oxide under 90 mM soil salinity condition increase the catalase and peroxidase enzymes activity, anthocyanin, proline, and soluble sugars content by 20.24%, 17.68%, 13.16%, 32.88%, and 14.08%, respectively, in comparison with no application of zinc under 90 mM soil salinity condition. Also, both soil application of ZnSo4 and foliar application of nano Zn oxide under non-salinity condition decrease hydrogen peroxide and malondialdehyde content in comparison with no application of Zinc under 90 mM soil salinity. Both soil application ZnSo4 and foliar application nano Zn oxide under non-salinity condition has had the highest grain weight (1.016 g per plant), compared to the application of this treatment combination at other salinity levels. It seems that both application of ZnSo4 and nano Zn oxide can increase weight yield of wheat under salinity condition due to their ability in improving biochemical traits.
alireza mohseni; Raouf Seyed sharif; saeid khomari
Abstract
In order to study the effect of bio fertilizers and putrescine on yield and some traits of wheat (Triticum aestivum L.) at various irrigation levels, a factorial experiment was conducted based on randomized complete block design with three replications at the research farm of University of Mohaghegh ...
Read More
In order to study the effect of bio fertilizers and putrescine on yield and some traits of wheat (Triticum aestivum L.) at various irrigation levels, a factorial experiment was conducted based on randomized complete block design with three replications at the research farm of University of Mohaghegh Ardabili, during 2018-2019. The factors include irrigation (full irrigation as control, irrigation withholding at 50% of heading and booting stages), bio fertilizers (no bio fertilizer, application of mycorrhiza, both application Psedomunas and Flavobacterim, application of mycorrhiza with Psedomunas and Flavobacterim) and putrescine foliar application (foliar application with water as control, foliar application with 0.5 and 1 mM of putrescine). Comparison of the means showed that the maximum amount of relative water content of flag leaf; chlorophyll index, stomatal conductance and quantum yield were obtained in full irrigation, application of mycorrhiza with Psedomunas and Flavobacterim and foliar application 1 mM of putrescine. Foliar application 1 mM of putrescine increased grain yield of about 8.5% in comparison with no application of putrescine. Also, the highest grain yield (799.44 and 746.38 g.m-2) were obtained with application of both Psedomunas and Flavobacterim, as well as application of mycorrhiza with Psedomunas and Flavobacterim, respectively under full irrigation conditions. In the meantime, the lowest (403.42 g.m-2) belongs to the treatment under irrigation withholding in booting stage, without the application of bio fertilizer. It seems that application of putrescine and bio fertilizers can increase grain yield of wheat under water limitation conditions as it improves some physiological traits.
Raouf Seyed sharif; reza seyed sharifi; Hamed Narimani
Abstract
In order to study the effect of methanol and seed inoculation with plant growth promoting rhizobacteria on grain filling components, chlorophyll content and grain yield of safflower (Carthamus tinctorius L.) under various irrigation levels, a factorial experiment has been conducted based on randomized ...
Read More
In order to study the effect of methanol and seed inoculation with plant growth promoting rhizobacteria on grain filling components, chlorophyll content and grain yield of safflower (Carthamus tinctorius L.) under various irrigation levels, a factorial experiment has been conducted based on randomized complete block design with three replications at the research farm of University of Mohaghegh Ardabili in 2020. The experimental factors include irrigation (full irrigation as control, irrigation withholding at 50% heading-bud, and flowering stages), biofertilizers application (no application as control, seed inoculation with Flavobacterium, Pseudomonas and both application of Flavobacterium and Pseudomonas), and methanol foliar application: (foliar application with water as control and foliar application with 10% and 20% volume of methanol). The results show that the content chlorophyll a (41.57%), b (74.59%) and total chlorophyll (49.33%), grain filling period, and effective grain filling period (27.32% and 72.89% respectively) and grain yield (69.2%) have increased under full irrigation condition, foliar application 20% volume of methanol, and both application of Flavobacterium with Pseudomonas in comparison with irrigation withholding at 50% heading-bud and no application of biofertilizers and methanol. Generally, the results show that application of plant growth-promoting bacteria and methanol can increase grain yield of safflower by improving chlorophyll content and grain filling components under water limitation condition.
Raouf Seyed sharif; reza seyed sharifi; hamed narimani
Abstract
In order to study the effect of bio-fertilizers and putrescine on biomass, nodulation, and some morphological and biochemical traits of vetch(vicia villosa)under rainfed conditions, a factorial experiment has been conducted based on randomized complete block design with three replications in research ...
Read More
In order to study the effect of bio-fertilizers and putrescine on biomass, nodulation, and some morphological and biochemical traits of vetch(vicia villosa)under rainfed conditions, a factorial experiment has been conducted based on randomized complete block design with three replications in research farm of University of Mohaghegh Ardabili within 2018-2019. The studied factors include bio-fertilizers(withoutbio-fertilizersas control, application of Rhizobium (Rhizobium legominuzarum), Mycorrhiza (Glomus mosseae), both application of Mycorrhiza and Rhizobium, Rhizobium and Azotobacter (Azotobacter chrocoocom strain 5), Mycorrhiza and Azotobacter, Rhizobium with Mycorrhiza,and Azotobacter) as well as foliar application of putrescine in three levels (foliar application with water as the control, application of 0.5 and 1 mM putrescine). Results show that both application of Azotobacter with Mycorrhiza and Rhizobium and foliar application of 1 mM putrescine increase root weight, leaf share from total biomass, soluble sugars of leaf and stem, and total biomass by 133.33%, 4.5%, 31.94%, 41.82%, and 56.94%, respectively, in comparison with no application of bio-fertilizers and putrescine. Also, application of Azotobacter with Mycorrhiza and Rhizobium and foliar application of 1 mM putrescine decrease electrical conductivity and malondialdehyde by 99% and 125.39%, respectively, in comparison with no application of bio-fertilizers and putrescine. It seems that application of bio-fertilizers and foliar application of putrescine can boost total biomass of vica villosa under rainfed condition as it improves both biochemical and morphological traits.
Raouf Seyed sharif; reza seyed sharifi
Abstract
In order to study the effects of various rates of starter nitrogen, methanol, and bio fertilizers on nodulation, grain filling period, and yield of lentil (Lens culinaris L.) under rainfed condition, an experiment has been carried out as factorial based on randomized complete block design with three ...
Read More
In order to study the effects of various rates of starter nitrogen, methanol, and bio fertilizers on nodulation, grain filling period, and yield of lentil (Lens culinaris L.) under rainfed condition, an experiment has been carried out as factorial based on randomized complete block design with three replications under field condition in Ardabil in 2018-2019. The factors include starter nitrogen in three levels (no nitrogen and N application of 25 and 50 kg/ha) by urea, bio fertilizers in four levels (without bio fertilizers, application of Rhizobium legominosarum, mycorrhiza and both application of mycorrhiza with Rhizobium legominosarum), application of methanol at three levels (foliar application with water and methanol applications of 15 and 30 volume percent). Means comparision show that the maximum number and weight of nodules per plant (12.72 and 11.59 mg per plant, respectively), grain filling rate (1.45 mg/day), grain filling period and effective grain filling period (35.17 and 29.91 days, respectively), number of pod per plant (34.43), and grain yield (1530 kg/ha) have been obtained at both applications of mycorrhiza with Rhizobium legominosarum, foliar application of 30 volume percent of methanol, and 50 kg/ha of starter nitrogen. The treatments display an increase of about 210%, 25.64%, 45.76%, and 103% in the number of nodules per plant, grain filling rate, effective grain filling period, and grain yield, respectively, in comparison with the control (no application of nitrogen, methanol, and bio fertilizers). Based on the results from this study, both applications of bio fertilizers (mycorrhiza with Rhizobium legominosarum) and foliar application of 30 volume percent of methanol with 50 kg/ha starter nitrogen are recommended to improve grain yield of lentil under rainfed condition.
fatemeh aghaei; Raouf Seyed sharif; hamed narimani
Abstract
In order to study the effect of 0.05 g.L-1 Uniconazole and biofertilizers application on yield, chlorophyll content and grain filling components of wheat using segmented model under soil salinity conditions, an experiment was carried out as factorial based on randomized complete block design with three ...
Read More
In order to study the effect of 0.05 g.L-1 Uniconazole and biofertilizers application on yield, chlorophyll content and grain filling components of wheat using segmented model under soil salinity conditions, an experiment was carried out as factorial based on randomized complete block design with three replications. Factors were included soil salinity in four levels (non-application of salinity as control and 40, 80 and 120 mM salinity in soil), by NaCl and single and combination application of Uniconazole and bio fertilizers (1) control or without bio fertilizers and Uniconazole, (2) mycorrhiza fungi, (3) Uniconazole, (4) Pseudomonas putida, (5) mycorrhiza with Pseudomonas putida, (6) mycorrhiza with Uniconazole, (7) both application of mycorrhiza with Uniconazole and Pseudomonas). A segmented model was used to quantifying the grain filling parameters. The results showed that both application of mycorrhiza with Uniconazole and Pseudomonas under no salinity condition increased the content of chlorophyll a, total chlorophyll, carotenoid, root weight and volume (39.8, 51.6, 47.2, 97.9 and 54.7% respectively) and also maximum of grain weight, grain filling period, effective grain filling period and grain weight (78.4, 21.8, 32.2 and 108.8% respectively) in comparison with no application of bio fertilizers and Uniconazole under the highest soil salinity level. Based on the results, bio fertilizers and Uniconazole application can be suggested as a proper approach for increasing of yield and grain filling period of wheat under soil salinity condition.
Raouf Seyed sharif; Reza Seyed Sharifi
Abstract
In order to study the effect of irrigation levels and application of methanol and nano iron oxide on yield and grain filling components of sunflower (Helianthus annuus L.), a factorial experiment was conducted based on randomized complete block design with three replications at the research farm of the ...
Read More
In order to study the effect of irrigation levels and application of methanol and nano iron oxide on yield and grain filling components of sunflower (Helianthus annuus L.), a factorial experiment was conducted based on randomized complete block design with three replications at the research farm of the Islamic Azad University, Ardabil Branch in 2017. The experimental factors were included: application of methanol (foliar application with water as control, 20 and 30 volume percent), nano iron oxide (foliar application with water as control, application of 0.3, 0.6 and 0.9 g.L-1) and irrigation levels (full irrigation as control, irrigation withholding at flowering stage, irrigation withholding at grain filling period). The results showed that the highest grain yield (2952 kg/ha), number of filled grains per head (1121 grains per head), 1000-grain weight (50 g), rate and grain filling period, effective grain filling period (0.00239 g/day, 42 and 33 days respectively) and chlorophyll index (56) were obtained in full irrigation and high levels of methanol and nano iron oxide. Maximum of proline and soluble sugars content (11.1 µg/g FW and 72 mg/g FW) were obtained in irrigation withholding at flowering stage and application of high rates of methanol and nano iron oxide. The least of they were obtained in full irrigation and no application of methanol and nano iron oxide.
Salim Farzaneh; Mohammad Shamloeian; Raouf Seyed sharif; Sahram Kadihodad Kadihodad
Abstract
This study aimed to evaluate the effect of sugar beet (Beta vulgaris) seed coating with organic fertilizer of Teprosyn, Kadostim and Zagroot on the emergence and seedling growth characteristics as factorial in a completely randomized design with three replications in 2015 at the Faculty of Agriculture ...
Read More
This study aimed to evaluate the effect of sugar beet (Beta vulgaris) seed coating with organic fertilizer of Teprosyn, Kadostim and Zagroot on the emergence and seedling growth characteristics as factorial in a completely randomized design with three replications in 2015 at the Faculty of Agriculture and Natural Resources of Mohaghegh Ardabili University under greenhouse conditions. The experiment factors included seed washing (washing without washing), hybrids (Shokoufa and pars) and different amounts of organic fertilizers of Teprosyn, Kadostim and Zagroot, with control and adhesive treatments. The results showed that seed washing treatment increased the percentage of emergence, velocity of emergence and the percentage of plant establishment, and decreased the time to 10 and 90% of the emergence. Percentage of seed emergence in seed coating treatments with Zagrot (20 ml per kg of seed), with 95% emergence, seed coating with Zagroot (30 ml per kg seed), with 94.16% emergence were superior to other treatments. The percentage of plant establishment in the Pars hybrid was higher than the Shokoufa. Among different treatments of seed coating, seed treatment with Zagroot, had the highest leaf area and root and leaf dry weight. In general, in this research, seed coating with Teprosyn and Zagroot improved seedling growth and increased plant establishment.
Raouf Seyed sharif; Reza Seyed Sharifi
Abstract
In order to study the effect of mycorrhiza and foliar nano (Fe and Zn) oxide spraying on yield and some biochemical traits of spring safflower (cultivar Padedeh) under water limitation condition, a factorial experiment was conducted based on randomized complete block design with three replications at ...
Read More
In order to study the effect of mycorrhiza and foliar nano (Fe and Zn) oxide spraying on yield and some biochemical traits of spring safflower (cultivar Padedeh) under water limitation condition, a factorial experiment was conducted based on randomized complete block design with three replications at the research farm of the Islamic Azad University, Ardabil Branch in cropping year of 2014. The experimental factors were included arboscular mycorrhiza application in two levels (with and without mycorrhiza), foliar application of nano zinc oxide in four levels (non-foliar application and foliar application of nano iron oxide, nano zinc oxide and nano zinc oxide + nano iron oxide) and irrigation in three levels [full irrigation as control, irrigation with holding at 50% of flowering and heading-bud stages (moderate and severe water limitation respectively)]. Results showed that water limitation was increased proline content, the activity of catalase, peroxidase, polyphenol oxidase enzymes. Mycorrhiza application and foliar nano (Fe and Zn) oxide spraying improved these traits under water limitation condition and normal irrigation. Means comparison showed that maximum of grain yield (2278.52 kg ha-1) was obtained at application of mycorrhiza, nano oxide of Zn+Fe and full irrigation. Minimum of it (834.25 kg ha-1) was obtained in non-mycorrhiza, no application of nano oxide and irrigation to heading-bud stage. Application of mycorrhiza and nano oxide of Zn+Fe increased grain yield by 35.9% as compared with non-mycorrhiza, non-foliar application of nano oxide under severe water limitation. It seems that mycorrhiza and nano oxide of Zn+Fe application is usable for profitable safflowerproduction under water limitation condition.
Raouf Seyed sharif
Abstract
To study the effects of nano-zinc oxide and seed inoculation with brady rhizobium and plant growth promoting rhizobacteria on yield and some agronomic traits of soybean, a factorial experiment based on randomized complete block design with three replications was conducted in 2013 at the research farm ...
Read More
To study the effects of nano-zinc oxide and seed inoculation with brady rhizobium and plant growth promoting rhizobacteria on yield and some agronomic traits of soybean, a factorial experiment based on randomized complete block design with three replications was conducted in 2013 at the research farm of the Islamic Azad University, Ardabil Branch. Treatments were foliar application of nano-zinc oxide at four levels (zero, 0.3, 0.6 and 0.9 gr/litr) and seed inoculation with brady rhizobium and plant growth promoting rhizobacteria at five levels (without inoculation as control, seed inoculation with brady Rhizobium japanicum, seed inoculation with brady rhizobium R. japanicum + Azosprillum lipoferum strain OF, seed inoculation with brady Rhizobium japanicum + Psedomonas putida strain 41, seed inoculation with brady Rhizobium japanicum + Azosprillum lipoferum + Psedomonas putida. The results showed that maximum of plant height, grain 100 weights, the number of nodules per plant and grain yield, total dry matter (530 gr/m2), crop growth rate (9.48 gr/m2.day) and relative growth rate (0.1 gr/gr.day) were obtained at foliar application of 0.9 gr/litr nano-zinc oxide + seed inoculation with rhizobium + Azosprillum + Psedomonas and the least of these indices were obtained at without foliar application of nano-zinc oxide + seed inoculation. It seems that using 0.9 gr/lit of nano-zinc oxide × seed inoculation with rhizobium and PGPR could increase the grain yield and some agronomic traits of soybean and can be recommended to the growers.
Ali Khosravi; Raouf Seyed Sharifi; Aliakbar Imani
Abstract
In order to study of nitrogen application time and seed inoculation with plant growth promotingrhizobacteria on yield, fertilizer use efficiency and grain filling rate of sunflower, a factorial experimentwas conducted based on randomized complete block design with three replications in research farm ...
Read More
In order to study of nitrogen application time and seed inoculation with plant growth promotingrhizobacteria on yield, fertilizer use efficiency and grain filling rate of sunflower, a factorial experimentwas conducted based on randomized complete block design with three replications in research farm ofIslamic Azad University, Ardabil branch in 2011. The first factor was time of nitrogen application inthree levels, (1/3 at 4-6 leaf stage, 1/3 at budding stage, 1/3 at flowering stage), (1/2 at 4-6 leaf stage, 1/2at budding stage), (1/4 at 4-6 leaf stage, 1/2 at budding stage, 1/4 at flowering stage) as N1, N2 and N3respectively and the second factor was seed inoculation with plant growth promoting rhizobacteria in fourlevels containing (without inoculation as control, seed inoculation with Azotobacter chrocococum strain5, Psedomunas putida strain 9, Psedomunas putida strain 41). The results showed that maximum of grainweight, grain filling period, grain and biological yield, 1000 grain weight, number of grain per head, plantheight, head and stem diameter were obtained in nitrogen application as N2×seed inoculation withAzotobacter. Maximum of nitrogen use efficiency was recorded at nitrogen application as N2×seedinoculation with Azotobacter and minimum of it was obtained in nitrogen application as N1× no seedinoculation. It seems that in order to increasing of grain yield, fertilizer use efficiency and grain fillingrate, can be suggested that should be applied nitrogen application time as N2×seed inoculation withAzotobacter.
Roushan Jafari; Raouf Seyed sharif; Ali Akbar Imani
Abstract
In order to study the influence of nitrogen and different harvesting dates on sorghum yield, a split plot experiment based on randomized complete block design was conducted with three replications in 2010 at the Research Farm of Islamic Azad University, Ardabil branch. Factors were: different harvesting ...
Read More
In order to study the influence of nitrogen and different harvesting dates on sorghum yield, a split plot experiment based on randomized complete block design was conducted with three replications in 2010 at the Research Farm of Islamic Azad University, Ardabil branch. Factors were: different harvesting dates in three levels containing, beginning of flowering, two and four weeks after beginning of flowering and nitrogen fertilizer in four levels (zero, 60, 120 and 180 kg N.ha-1). The results showed that maximum of forage yield was obtained by the plots which were applied 180 kg N.ha-1 in four weeks after beginning flowering and the least of it was in no application of nitrogen fertilizer in beginning of flowering. Means comparison showed that the highest nitrogen use efficiency was obtained by the plots which was applied 60 kg N.ha-1 in four weeks after beginning flowering and the least of it was in application of 180 kg N.ha-1 × beginninig of flowering. Maximum of stem and leaf protein was obtained in the highest of nitrogen fertilizer rates. It seems that in order to increasing of forage yield, should be applied 180 kg N.ha-1 × four weeks after beginning flowering in climate conditions of Ardabil. If the aim is to improve nitrogen use efficiency, then applying 60 kg N.ha-1 in four weeks after beginning flowering can be suggested.
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 ...
Read More
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.