Masoumeh Makvandi; AbdolMahdi Bakhshandeh; Ali Moshatati; Mohammad Moradi Telavat; Aydin Khodaei joghan
Abstract
Objective: The effect of the combined use of nitrogen fertilizer with sugarcane residue compost and growth-promoting bacteria on wheat quality traits and yield in the heat stress conditions of the end of the season in Ahvaz was investigated.Methods: An experiment was carried out in the form of two split ...
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Objective: The effect of the combined use of nitrogen fertilizer with sugarcane residue compost and growth-promoting bacteria on wheat quality traits and yield in the heat stress conditions of the end of the season in Ahvaz was investigated.Methods: An experiment was carried out in the form of two split plots in the form of a randomized complete block design with three replications. The experimental factors include three sowing dates: 22 November, 11 December and 31 December in main plots; six combined of nitrogen with compost include control, 100% nitrogen, 75% nitrogen+ 25% compost, 50% nitrogen+ 50% compost, 25% nitrogen+ 75% compost and 100% compost in sub-plots and two levels of use and non-use of bacteria in sub plots.Results: Results showed the effect of Sowing date and the combined use of nitrogen with compost and growth-promoting bacteria were significant on all measured traits. Average comparison showed that combined use of 50% nitrogen + 50% compost with bacterial application increased the characteristics of Grain filling duration and Grain filling rate, Grain protein percentage and wet gluten. Also, the highest seed yield (5864 kg/ha) was obtained on the first planting date and combined consumption of 50% nitrogen + 50% compost and the lowest amount (1115 kg/ha) was obtained on the third planting date and the control treatment.Conclusion: The combined use of nitrogen fertilizer and compost with growth-promoting bacteria could reduce the negative effect of heat stress at the end of the season on the measured plant traits.
Seyedahmad Kalantarahmadi; Jahanfar Daneshian; Habib Mobinirad
Abstract
In order to develop winter cultivation and improve crop rotation in the region, an experiment has been conducted to evaluate the effects of sowing date on sunflower cultivars seed yield. It is a split-plot based on completed randomized blocks design with four replications in Safiabad Agricultural and ...
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In order to develop winter cultivation and improve crop rotation in the region, an experiment has been conducted to evaluate the effects of sowing date on sunflower cultivars seed yield. It is a split-plot based on completed randomized blocks design with four replications in Safiabad Agricultural and Natural Resources Research and Education Center of Dezful and has taken place during two years (2015-2016). The main plots are consisted of four sowing date levels (23rd Jan, 6th Feb, 20th Feb, and 6th Mar), while the sub plots include nine levels of cultivars (Azargol, Armavirski, Barzegar, Progress, Record, Shams, Farokh, Ghasem, and Gabor). Delay in the sowing date has decreased growth period length and plant height, with the greatest number of seeds per capitulum (684.17) belonging to record cultivar on the first sowing date in the first year and the maximum one (767.47) occurring again to this cultivar on the third sowing date in the second year. The maximum seed yield in the first (3850 kg.ha-1) and second (4088 kg.ha-1) year belong to the first sowing date (23rd Jan) and Azargol cultivar. Based on the results, Azargol cultivar have had the lowest rank, being considered as the cultivar with the highest seed yield on all sowing dates, followed by Record and Armavirski, in the second and third placed, respectively. In terms of stability, considering that Farrokh cultivar also has had the lowest standard deviation, it has been selected as the most stable cultivar.
dalir fayazipour; Gholam Ali Akbari; Iraj Allah dadi; fatemeh amini; Marjan Alsadat Hoseinifard
Abstract
This study attempts to evaluate the effects of planting date and spraying CCC on some biochemical characteristics and qualitative and quantitative yield of sugar beet. It has conducted an experiment, using a Split factorial based on randomized complete block design with three replications in 2015-2016 ...
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This study attempts to evaluate the effects of planting date and spraying CCC on some biochemical characteristics and qualitative and quantitative yield of sugar beet. It has conducted an experiment, using a Split factorial based on randomized complete block design with three replications in 2015-2016 growth season in field experiment of university of Abourayhan, Tehran University. The treatments include planting date (2nd of October and 22nd of October) as the main factor and cultivars (Suprima and 9597) and foliar spraying (1000 ppm) / non-application of CCC as sub plots. The results show that the highest percentage of bolting (54.58%) and sodium content (equivalent to 9.16 mEq / 100 g of sugar beet pulp) take place on October 2, while the highest root yield (26.15 ton per hectare) and white sugar yield (equal to 1.44 tons per hectare) happen on October 22. Also, it has been observed that most values of the studied traits (except bolting percentage and sodium content of sugar beet pulp) have occurred through the cultivation of Suprema with CCC spraying. Overall, it can be concluded that the best conditions to determine the best root and sugar yield in the area of research, on 22nd of October, the Suprima and application of 1000 ppm are recommended in order to cultivate sugar beet in the Pakdasht area.
Seyedahmad Kalantarahmadi; Jahanfar Daneshian
Abstract
The present experiment has been carried out as a split plot based on randomized complete block design with three replications in Safiabad Agricultural and Natural Resources Research and Education Center of Dezful between 2012 and 2014. The main plots is consisted of 3 sowing dates (November 5, November ...
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The present experiment has been carried out as a split plot based on randomized complete block design with three replications in Safiabad Agricultural and Natural Resources Research and Education Center of Dezful between 2012 and 2014. The main plots is consisted of 3 sowing dates (November 5, November 25, and December 15) with the sub plots including 10 levels of foliar application (100, 200, 300 mg.lit-1 ascorbic acid, 100, 200, 300 μmol ascorbic acid, 10, 20, 30 vol% methanol, and the foliar application of distilled water as control treatment). The effect of sowing date and foliar application as well as their interaction has had significant effect on proline, soluble sugars, number of siliques per plant, and seed yield (P≤0.01). Comparing means of sowing date × foliar application shows that the maximum number of siliques per plant (68.96) has been formed in the first sowing date with the foliar application of ascorbic acid (300 mg.lit-1). There has been a significant difference between different sowing dates: the seed yield has decreased in the second and third sowing date, compared to the first one by 145% and 30%, respectively. However, foliar application of experimental treatments has increased the seed yield in all sowing dates, but it is recommended to use ascorbic acid (300 mg.lit-1) in the first and third sowing dates as well as salicylic acid (200 µmol) and methanol (10%) in the second sowing date.
Fatemeh salmani; afshin soltani; Ebrahim Zeinali; Hossein Shahkoomahali
Abstract
In order to simulate transplantation, the parameters related to cotton seedling growth are firstly measured in a factorial experiment in a randomized complete block design at Gorgan University of agricultural sciences and natural resources within 2018. The parameters are then utilized in SSM-iCrop2 Model. ...
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In order to simulate transplantation, the parameters related to cotton seedling growth are firstly measured in a factorial experiment in a randomized complete block design at Gorgan University of agricultural sciences and natural resources within 2018. The parameters are then utilized in SSM-iCrop2 Model. In the simulation section, four seedling size based on the leaf area (namely 17, 22, 27, and 37 cm-2 per plant) are evaluated in 4 planting dates (15 June, 1 July, 15 July, and 30 July). Results show that in early planting date, seedling transplantation rushes the process of crop maturation for 43 to 49 days. However, this has had no significant effect on yield values (from 453 to 461 g/m2) and net water requirement (312 to 316 mm). The usual sowing date causes the crop to mature between 27 and 38 days (earlier vacant land), whereas seed sowing at this planting date impairs the subsequent crop cultivation. At this planting date, as in early planting, transplanting has no strong effect on the yield (from 444 to 452 g/m2) and water requirement (299 to 308 mm). In a late planting date, seedling transplanting with four seedling sizes between 1 and 5 days results in premature seed germination, even though seed cultivation impairs subsequent planting. At this planting date, transplanting has a noticeable effect on the yield (361 to 441 g/m2), but the amount of pure irrigation (271 to 300 mm) remains unaffected by transplanting.
Javad Hasanpour; Kaveh Zargari; Behnam Zand; mojtaba kanani
Abstract
In order to study the effects of planting date and cultivar on yield, protein percentage and physiological growth indices of Mungbean an experiment was conducted in Agriculture and Natural Resource Research Center of Tehran province in 2011-12. Four mungbean [Vigna radiata (L.) Wilczek] cultivars (‘Parto’, ...
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In order to study the effects of planting date and cultivar on yield, protein percentage and physiological growth indices of Mungbean an experiment was conducted in Agriculture and Natural Resource Research Center of Tehran province in 2011-12. Four mungbean [Vigna radiata (L.) Wilczek] cultivars (‘Parto’, ‘Gohar’, ‘Mehr’ and a promising line ‘NM-94’) were sown at 3 dates with 30 days intervals starting from 21 April to 22 June to identify the suitable variety(s) and optimum sowing date for getting maximum yield of mungbean. The design was a split-plot replicated three times with sowing date as main plots and cultivar as sub-plots. Promising line ‘NM-94’ was ranked first in terms of seed yield (1797.4 kg ha-1) followed in order of ‘Gohar’ (1674.8 kg ha-1). The highest seed yield (1678.2 kg ha-1) was obtained from 22 June sowing date. Delayed sowing caused to decrease of growth period length from 92.9 (for 22 April) to 82.6 (for 22 June) that it resulted to a significant decrease of vegetative growth indices such as plant height and biological yield. The maximum LAI and CGR were obtained at a longer time and had more value for earlier sowing dates. The growth period length decreased for the last sowing date, but early entering to flowering stage increased grain filling portion from total growth period. Sowing date had not a significant effect on protein percentage, but this effect was significant for varieties. ‘NM-94’ line and 22 June were the best choices for south east region of Tehran province.
Abolfazl Faraji
Abstract
In order to study the effect of temperature and photoperiod (PP) on development rate of different vegetative and reproductive stages of canola, an experiment was conducted at Agricultural Research Station of Gonbad during 2005-2007. The experiment was a randomized complete block design arranged in a ...
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In order to study the effect of temperature and photoperiod (PP) on development rate of different vegetative and reproductive stages of canola, an experiment was conducted at Agricultural Research Station of Gonbad during 2005-2007. The experiment was a randomized complete block design arranged in a split-plot in two conditions, for example supplemental irrigation and rainfed. There were different regression equations between mean temperature and duration of development periods, i.e. a negative power equation for periods from planting to emergence and from emergence to beginning of budding, a quadratic equation for periods from beginning of budding to beginning of flowering and beginning of flowering to beginning of seed filling, and a negative linear equation for period from beginning of seed filling to physiological maturity. The decrease in seed filling period with increase in temperature was considerably higher in Hyola401 hybrid than RGS003 cultivar, indicating that the response of Hyola 401 development to temperature was more than RGS003. There was a positive linear relationship between mean PP from emergence to beginning of flowering with cumulative thermal time during this period, explaining 68 and 74 percent of the variation for Hyola401 and RGS003 cultivars, respectively, showing the positive effect of PP on canola development from emergence to beginning of flowering. Canola development was affected by PP and temperature during emergence to beginning of flowering, and temperature during beginning of flowering to physiological maturity.
Davood Afiuni; Amir Houshang Jalali; Reza Khakpour; Leili Safaei; Tohid Najafi-Mirak; Gholamali Akbari
Abstract
In order to assess the impact of different sowing dates on yield and yield components of wheat genotypeswith different growth habits, a two years study (2007-2009) using a split plot in randomized completeblock design with three replications was conducted in Kabootarabad Agricultural Research Station ...
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In order to assess the impact of different sowing dates on yield and yield components of wheat genotypeswith different growth habits, a two years study (2007-2009) using a split plot in randomized completeblock design with three replications was conducted in Kabootarabad Agricultural Research Station ofIsfahan. Three sowing dates of 12 Oct., 1 Nov., and 21 Nov. were main plots and 15 genotypes of wheatwere subplots. The average grain yield in three planting dates was 8495, 9156 and 6749 kg ha-1,respectively. At all planting dates, the maximum and minimum grain yield belonged to spring and wintertypes and the grain yield of winter, facultative and spring groups were 7519, 8267 and 8614 kg ha-1,respectively. At 1 Nov. five spring genotypes M-81-13, Bahar, Pishtaz, Kavir and Marvdasht andfacultative cultivar Alvand produced the highest grain yield by an average of 10433, 10146, 10040, 9843,9822 and 9813 kg/ha and therefore can be recommended for planting in temperate regions of theprovince. Spikes per m2 and grain weight were the most important yield components that were reduced inresponse to late planting. Based on the results, 1 Nov. can be recommended as the best planting date forthe region.
Mahmoud Lotfi; Elham Ali abadi; Ali Rezvani; Reza Amiri
Volume 13, Issue 1 , August 2011, , Pages 65-74
Abstract
The effects of priming treatment using five osmotic solutions (PEG, manitol, KNO3, KH2PO4 and combination of two salts) in six osmotic potentials (-1 to -1.5 MPa) was studied on germination percentage, rate and uniformity of melon seeds. The best results were obtained with high concentrations of KNO3 ...
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The effects of priming treatment using five osmotic solutions (PEG, manitol, KNO3, KH2PO4 and combination of two salts) in six osmotic potentials (-1 to -1.5 MPa) was studied on germination percentage, rate and uniformity of melon seeds. The best results were obtained with high concentrations of KNO3 and lower concentrations of manitol. Mean germination time of melon seeds in 19°C was preceeded 36 to 48 hours and more uniformity observed but percent germination decayed a little (1-4 percent) reduced in some cases. In addition, storage of primed seeds in room temperature for four months reduced their quality lightly however major priming effects were conserved. In second trial which was done using KNO3 and manitol seeds were suspended in solutions freely or inside bags and also under temperatures 19°C and 22°C, the fastest germination was occurred using manitol inside bags and -1.5 MPa. Effects of priming were more abvious in lower temperatures and also lower potentials showed had better results for uniformity, consistantly.