南疆杏麦复合系统条件下小麦灌浆期冠层的光特性

选用新冬22号小麦品种,研究了5种不同类型杏树带型下小麦冠层光特性和6m与4m两种带型下小麦的平均产量。结果表明:①宽幅小麦冠层光照强度、光合有效辐射(PAR)、叶面积指数(LAI)优于窄幅小麦(即:6m×4m6m×3m4m×2m4m×1.5m),小麦冠层各光合指标在杏树带中从东到西呈现出由小增大再减小的变化趋势。②小麦的光特性在幼年杏树带中优于在成年杏树带中(即:5年7年8年)。③6m和4m宽幅下,近树冠区小麦产量低于远离树冠区小麦产量,宽幅模式小麦产量高于窄幅模式小麦产量,表明光合特性是影响小麦产量的一个重要因子。

Study on the Optical Characteristics of Wheat Under Apricot wheat System in the South of Xinjiang

The study had been carried out to find out the optical characteristics of wheat under apricot-wheat system with Xindong 22 Variety of wheat as test materials and under five types of apricot-wheat and two kinds of broad terms(6 m and 4 m) intercrop. The optical characteristics of wheat and the average yield of wheat were studied. The result showed that:①The canopy intensity, photosynthetic active radiation (PAR), leaf area index (LAI) of wide wheat in growing areas is better than narrow (6 mX4 m>6 m×3m>4 m×2 m>4 m×1. 5 m), the graphic trends increased first at first and then decreased. ②The optical characteristics of young apricot intercropping is better than the adult apricot intercropping (5 years> 7 years> 8 years); ③Under the 6 m and 4 m modes , the wheat production per line with the vertical distance from the apricot change as follows; output of the last crown area is higher than the crown area, the production of wide board mode is higher than the narrow broad mode. The result showed that the optical characteristics is an important factor to wheat production.