枣麦间作系统中光能在小麦群体内传播规律的研究

THE SUNSHINE PROPAGATING LAWS WITHIN THE WHEAT COLONY IN THE SYSTEM OF THE WHEAT-JUJUBE INTERPLANTING

本文应用农业气象学原理和方法，根据实测资料，计算分析了枣麦间作系统中枣树带遮荫宽度及荫影内的相对光照度的时空变化规律；以及遮荫区、非遮荫区内小麦群体的光能铅直分布特点。应用数理方法，模拟了遮荫区及非遮荫区内小麦群体光能铅直分布曲线。结果表明，南北走向的枣带每天早、晚其遮荫区域较宽，相对光照度较大，中午前后，遮荫区域较窄，相对光照度较小；尽管遮荫区与非遮区内小麦群体的光能铅直分布有明显的差异，但二者都附合高斯曲线的递减规律。

On the basis of the field observation data,with the principle and method of agricultural meteorology,the daily variation laws of the shadow width of the jujube tree belts and the relative sunshine intensity were analysed in the system of jujube-wheat interplanting;and the characteristics of the sunshine vertical distribution within the wheat colony inside and outside the shadow was studied.According to mathematical methods,the sunshine vertical distribution curves in the wheat colony inside and outside the shadow were simulated.The results show that the shadow area of the south-north planting jujube tree belts are fairly wider and the relative sunshine intensity is larger in early morning and late afternoon than at about noon;though the sunshine vertical distribution in the wheat colony are obviously different inside the shadow to outside the shadow,they both comply with Gauss Curve decreasing laws.