Ayoub Jafari; MohammadReza Bihamta; Masoumeh Moghbel; Saeid Soufizadeh; Saeed Bazgeer; Mostafa Karimi
Abstract
Objective: To evaluate the effect of planting date on the morphological traits, growth indices and seed corn yield of three varieties, an experiment was carried out in the research farm of University of Tehran in Karaj city in 2019.
Methods: The experiment was conducted as a split-plot design based ...
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Objective: To evaluate the effect of planting date on the morphological traits, growth indices and seed corn yield of three varieties, an experiment was carried out in the research farm of University of Tehran in Karaj city in 2019.
Methods: The experiment was conducted as a split-plot design based on randomized complete blocks with four replications. In this experiment, planting date in 3 levels (May 24, June 21, and July 18) was considered as main plots and variety (early KSC400, medium-early KSC647, and late KSC704) as sub plots.
Results: The results showed the highest yield is related to the second planting date (11.98 ton/Kg-1), and the longest period until the appearance of the the tassel was belonged to the first planting date (63.7 days).
The third (129/7 days), the second (122/3 days) and first planting date (113/3 days) had the longest period of physiological maturity, respectively. Also, KSC704 had the highest plant height and stem diameter, and KSC647 had the highest number of leaves. Also, the maximum leaf area, the growth rate of crop in the flowering stage was related to the cultivar KSC704 on the second and third planting date, respectively, and the maximum relative growth rate and the net absorption rate in the first vegetative stages were related to the cultivar KSC704 on the third planting date and the second planting date.
Conclusion: Overall, the second planting date and KSC704 variety are suggested as the suitable date and variety for Karaj city.
Nasrin Teimoori; Mokhtar Ghobadi; Danial Kahrizi
Abstract
Objective: The research aimed to investigate the effect of silicon foliar spraying in increasing drought tolerance in Camelina.Methods: The experiment was conducted as a factorial based on a randomized complete blocks design with three replications in a pot experiment. The treatments included two Camelina ...
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Objective: The research aimed to investigate the effect of silicon foliar spraying in increasing drought tolerance in Camelina.Methods: The experiment was conducted as a factorial based on a randomized complete blocks design with three replications in a pot experiment. The treatments included two Camelina genotypes (Sohail cultivar and line-84), drought treatments (at two levels: without and with drought stress) and foliar spraying of sodium silicate (at five levels: 0, 2, 4, 6 and 8 mM).Results: The results showed that drought stress decreased grain yield, yield components, and morphological traits of both Camelina genotypes. Drought stress reduced the grain weight per plant of the Sohail cultivar and Line-84 by about 27 and 39%, respectively. Foliar application of silicon effectively increased yield and yield components. On average, foliar spraying of 6 mM silicon compared to the control treatment caused an increase in the traits of grain weight per plant (13.04%), harvest index (12.1%), and the number of siliques per plant (7%). In the correlation analysis, it was found that among the grain yield components, the highest positive correlation coefficient with the grain weight per plant belonged to the number of siliques per plant (0.941).Conclusion: Overall, it seems that foliar application of 6 mM silicon can be effective in increasing drought tolerance in Camelina.
Fatemeh Samadzadeh; Alireza Pirzad; Hossein Zeinalzadeh-Tabrizi
Abstract
Determining the appropriate planting arrangement and plant density leads to better productivity of resources and increased yield per unit area. In this regard, an experiment was conducted in the Ardabil agricultural and natural resources research and education center (Moghan) during the 2021 crop year. ...
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Determining the appropriate planting arrangement and plant density leads to better productivity of resources and increased yield per unit area. In this regard, an experiment was conducted in the Ardabil agricultural and natural resources research and education center (Moghan) during the 2021 crop year. This experiment uses a strip plot design based on randomized complete blocks with four replications. Its main factor is the effect of planting rows at a spacing of 30, 45, and 60 cm with planting spacing of 5, 8, 11, and 14 cm serving as the subfactor. According to the results, by increasing the distance between plants on the planting row, the maximum days to flowering initiation (47.25 days), growth period (122.25 days), stem diameter (8.33 mm), number of branches (2.97), and capsule length (24.20 mm) of sesame can be observed at a planting distance of 14 cm between the plants. Row spacing of 45 to 30 cm increases the number of capsules per plant, the number of seeds per capsule, and 1000-seed weight of sesame by 33%, 18.50%, and 16%, respectively. The highest seed yield, fresh and dry weight belong to 1455.40, 5021.80, and 1280.73 kg/ha, respectively, at 45 cm distance between planting rows. The results from this experiment show that planting arrangement with a distance between plants of 14 cm and a distance between planting rows of 45 cm, with optimal use of environmental resources is suitable for cultivation in Moghan plain and recommended for local farmers.