Abstract

A factorial split-plot experiment was performed in order to investigate the effect of foliar application of cycocel, iron and zinc micronutrients on the yield and some physiological traits of wheat under drought stress conditions in the form of complete randomized block design with three replications for two crop years in Robat Karim area (south of Tehran). In this study, irrigation at two levels (i₁: normal irrigation and i₂: irrigation interruption from the beginning of the reproductive stage) was considered as the main factor, the cycocel application at two levels (c₁: non-application and c₂: cycocel application at 0.5 L ha⁻¹) and foliar application of micronutrients at four levels (f₁: pure water (control), f₂: iron foliar application, f₃: zinc foliar application, and f₄: iron + zinc foliar application (each at a ratio of 0.3%) were considered as the secondary factors. The application of cycocel under both normal irrigation and stress conditions at the reproductive stage increased seed yield and yield components. Iron + zinc foliar application with a mean of 5543 kg ha⁻¹ had the highest seed yield while the lowest value belonged to the control treatment (pure water) with a mean of 4638 kg ha⁻¹. In general, given the positive effect of cycocel and iron and zinc micronutrients on wheat crop characteristics, the application of these treatments under normal irrigation conditions and late season drought stress are recommended for the development of cultivation in temperate cold regions with semi-arid climate.

摘要

为了研究在干旱胁迫条件下叶面喷施豆蔻、铁和锌微量元素对小麦产量和一些生理性状的影响，以完全随机区组设计的形式进行了两次重复三次的析因试验。罗巴特卡里姆地区（德黑兰南部）的作物年份。在这项研究中，两个水平的灌溉（i ₁：正常灌溉和i ₂：从生殖阶段开始灌溉中断）被认为是主要因素，两个水平（c ₁：不施用和c ₂ : cycocel 施用 0.5 L ha ^-1 ) 和叶面施用四个水平的微量营养素 (f ₁：纯水（对照）、f ₂：铁叶面喷施、f ₃：锌叶面喷施和f ₄：铁+锌叶面喷施（各自的比例为0.3%）被认为是次要因素。在正常灌溉和繁殖期胁迫条件下施用 cycocel 可提高种子产量和产量构成。铁+锌叶面喷施平均5543 kg ha ^-1种子产量最高，对照处理（纯水）最低，平均4638 kg ha ^-1. 总的来说，考虑到 cycocel 和铁锌微量元素对小麦作物特性的积极影响，建议在正常灌溉条件和晚季干旱胁迫下应用这些处理，以发展在半干旱气候的温带寒冷地区种植。