To determine the suitable sowing date in each region, it is important to note that environmental conditions should be optimal during the crop growing season. Plant nutrition using macro-elements and micro-elements improves crop growth and quantitative and qualitative yields under environmental stresses. A 2-year experiment (2015–2016 and 2016–2017) was conducted to investigate the effect of zinc (Zn) foliar spray on quantitative and qualitative yields of spring rapeseed genotypes at winter sowing dates. The factorial split-plot arrangement of treatments was set up in a randomized complete block design with three replications. Main plots included three winter sowing dates of 9, 19, and 29 February and Zn foliar spray at two levels of non-Zn foliar spray (control) and Zn foliar spray (5 g l⁻¹ at the stem elongation stage). Sub-plots contained four genotypes of Sarigol, Dalgan, Salsa, and Solar. While silique number per plant, seed number per silique, 1000-seed weight, seed yield, oil yield and content, and oleic, linoleic, and palmitic acids of the study genotypes were lessened at late sowing dates, contents of linolenic, stearic, and erucic acids and glucosinolate were significantly increased in such condition. Zn foliar spray improved seed yield and yield components, oil yield and content, and linoleic acid content, while contents of linolenic, stearic, and erucic acids and glucosinolate were dropped. Overall, the current study suggests that to produce the optimal quantitative and qualitative yields in rapeseed agro-ecosystems, genotypes should be cultivated on an optimum winter sowing date (February 9) and treated with Zn.

为了确定每个地区合适的播种日期，重要的是要注意在农作物生长季节环境条件应该是最佳的。使用大型元素和微量元素的植物营养可改善环境胁迫下的作物生长以及定量和定性的产量。进行了为期两年的实验（2015-2016年和2016-2017年），以研究叶面喷施锌对冬播期春油菜基因型定量和定性产量的影响。处理的阶乘分解图布置是在具有三个重复的随机完整块设计中建立的。主要地块包括3月的冬季播种日期，即2月9日，19日和29日，以及分别以非锌叶面喷雾（对照）和锌叶面喷雾（5 g l ^-1）的两个水平进行的锌叶面喷雾。在茎伸长阶段）。子图包含Sarigol，Dalgan，Salsa和Solar的四种基因型。虽然每基因型的单株长角果数，每根长角果的种子数，1000粒重，种子产量，油产量和含量以及研究基因型的油酸，亚油酸和棕榈酸在播种后期，亚麻酸，硬脂酸和在这种情况下，芥酸和芥子油苷明显增加。锌叶面喷雾剂改善了种子的产量和产量成分，油的产量和含量以及亚油酸含量，而亚麻酸，硬脂酸和芥酸和芥子油苷的含量下降了。总体而言，当前的研究表明，要在油菜农业生态系统中获得最佳的定量和定性产量，应在最佳冬季播种日期（2月9日）种植基因型，并用锌处理。