One of the factors limiting the growth of crops is water deficit. A split plot factorial experiment was conducted in Qazvin (Iran) to determine the effects of water deficit stress on three Brassica species at different growing stages and application of zeolite in 2010-12 growing seasons. In these experiments factorial combination of different levels of water deficit stress (regular irrigation (I0), with holding irrigation from flowering stage to end of plant life cycle (I1), and with holding irrigation from pod stage to end of plant life cycle (I2) and zeolite were applied (0 and 10 t.ha<sup>-1</sup>), in main plot units, and different species (B. napus, B. rapa and B. junceu) were placed in sub plot units. Results showed that interactions among water deficit stress and different species, different water deficit stress and two zeolite amounts were significant for number of branches per plant, length of main, sub and total plant pod, and seed oil yield. Application of zeolite in all water deficit regimes increased the seed oil percent and seed oil yield and in interaction between these two factors, I1 without zeolite reduced the seed oil yield, in comparison to I0 and zeolite application.
In order to investigate the effect of seed sowing date and humic acid foliar application on some agronomic traits of bread wheat an experiment was conducted in Islamshahr, Iran during 2013 growing season. The experimental design was a complete randomized block design arranged in factorial with three replications. The first factor was included two sowing date (middle of November and middle of December) and the second factor was included three humic acid levels (0, 4 and 8 liter ha -1 ). The results indicated that late seed sowing lead to significant reduction in agronomic traits such as tiller number, spike number, seed number and seed weight. In addition, vegetative growth was affected by late seed sowing and so that shorter plants were observed. Number of days until spike emergence, number of days until pollination and number of days until physiological maturity decreased due to late seed sowing. By contrast, humic acid application increased plant growth and improved yield and yield components through extending growing period.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.