Abstract

The purpose of this study was to examine the features of leaf area formation in spring cereals under agroecological conditions of the middle Amur region. The study is concerned with the varieties of spring oat Ekspress, spring soft wheat Khabarovchanka, and spring triticale Ukro. The features of leaf area formation in spring cereals have been shown at the major stages of organogenesis, and the maximum leaf area duration has been found at the heading–flowering stage. The maximum flag–leaf area duration in oat and triticale at the booting stage and in spring wheat at the heading stage has been obtained. Spring oat forms up to seven leaf layers, but spring wheat and spring triticale form from five to six layers under favorable conditions. However, the leaf apparatus was decreased significantly under the influence of environmental stresses. The high and direct correlation dependence of spring cereal yield on the total leaf area of plants (R = 0.891–0.986) has been determined. The formation of the leaf–area duration of spring cereals is strongly dependent on some agrometeorological conditions of the vegetation period, such as air–ground interface temperature, photosynthetically active radiation, and water availability.

中文翻译：

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中阿穆尔河地区春季谷物的叶区形成

摘要

本研究的目的是研究中阿穆尔河地区农业生态条件下春季谷物中叶区形成的特征。该研究涉及春燕麦Ekspress，春软小麦Khabarovchanka和春黑小麦Ukro的品种。春季谷物的叶面积形成特征已在器官发生的主要阶段表现出来，而最大的叶面积持续时间则在抽穗开花期被发现。获得了在孕穗期燕麦和黑小麦的最大旗叶面积持续时间，以及在抽穗期小麦和小黑麦的最大旗叶面积持续时间。在有利条件下，春燕麦最多可形成七层叶，而春小麦和小黑麦则可形成五至六层。然而，在环境胁迫的影响下，叶片装置明显减少。R = 0.891–0.986）已确定。春季谷物的叶面积持续时间的形成在很大程度上取决于植被时期的一些农业气象条件，例如空气-地面界面温度，光合有效辐射和水的可用性。