ABSTRACT

In order to reduce the damage caused by late-season drought stress of canola, a factorial split plot experiment was performed on the basis of the randomized complete blocks design with three replications in Karaj, Iran. The treatments were Potassium sulfate in two levels, including application and non-application of potassium sulfate, irrigation at three levels including normal irrigation (control), restricted irrigation from the flowering and pod formation stage, as factorial were in main plots and winter canola cultivars including Opera, L72, KR1, GKH3705, GKH0224 were in subplots. The interaction effect of potassium sulfate × irrigation × cultivar on plant height, number of pods per the main stem, number of pods per branch, number of pods per plant, seed yield, and seed oil yield was significant at the 1% level. In conditions of applying potassium sulfate and irrigation interruption from the flowering stage, Opera cultivar had the highest seed yield with a mean of 3715 kg ha⁻¹. In conditions of not applying potassium sulfate and under normal irrigation (control), the promising line of L72 with a mean of 6169 kg ha⁻¹, and in the late season drought stress (irrigation interruption from the pod formation and flowering stages), the opera cultivar with the means of 4763 and 3468 kg ha⁻¹ had the highest seed yield.

摘要

为降低油菜晚季干旱胁迫对油菜籽的危害，在伊朗卡拉季，在随机完全区组设计的基础上，进行了三次重复的因子裂区试验。处理为硫酸钾两个水平，包括应用和不应用硫酸钾，三个水平灌溉包括正常灌溉（对照），从开花和结荚阶段开始限制灌溉，因为因子在主要地块和冬季油菜品种中包括 Opera、L72、KR1、GKH3705、GKH0224 在子地块中。硫酸钾×灌溉量×品种对株高、每主茎结荚数、每枝结荚数、每株结荚数、种子产量和种子油产量的交互作用在1%水平上显着。^-1。在不施用硫酸钾和正常灌溉条件下（对照），L72 有希望的品系，平均为 6169 kg ha ^-1，在季末干旱胁迫（从结荚期和开花期中断灌溉），平均数为 4763 和 3468 kg ha ^-1的歌剧品种的种子产量最高。