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交城县农业气候资源普查队在洪相公社广兴大队进行了套作田通风透光等田间试验研究,现就实例和理论推算结果,向大家作简要汇报。一、不同行向、带宽光照条件的理论分析 1.行向带宽结构与小麦对玉米的遮光影响:小麦玉米共生期间,小麦对玉米的遮光影响很大,不同行向、带宽以及前后行玉米都不相同。我们计算了从5月20日—6月20日三种行向、三种带宽前后行玉米基部的可照时数(表1)。由表可见,行向和带宽对双行玉米的遮光影响是显著的,其中尤以行向
Jiaocheng County agricultural climatic resources census team in Kwong Hing commune Kwong Hing set of field trials for field ventilation and transparency, etc., are examples and theoretical projections, to brief you. First, the theoretical analysis of different directions, the bandwidth of light conditions 1 line to the bandwidth structure and the impact of wheat on the shading of corn: wheat and corn symbiosis, the impact of wheat on the shading of corn is great, different lines, the bandwidth and the corn are Are not the same. We calculated the number of hours that the base of three rows of forward and backward corn with three bandwidths from May 20 to June 20 (Table 1) can be illuminated. Can be seen from the table, row and bandwidth of two lines of maize shading effect is significant, especially in line to