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根据本省长沙、衡阳等五地1981-1983年田间试验,大豆玉米间作具有改善复合群体本身田间微气象条件及改善后茬作物-晚稻气候生态条件的功能,主要为:1.提高复合群体的光截取量和减少光反射当间作玉米密度为每亩2000株时,大豆植株2/3处的截光率比单作大豆平均提高3.2～9.8％,复合群体顶部光反射率减少0.9％。2.增高昼温,降低夜温,增大温差和增高湿度大豆花、荚期(5月下旬～6月下旬),间作田大豆植株2/3处昼温比同期大气温高0.1～4.4℃,而单作大豆同一高度处
According to the 1981-1983 field experiment conducted in Changsha, Hengyang, and other five places in the province, soybean intercropping has the functions of improving the micro-meteorological conditions of the composite population itself and improving the climatic and ecological conditions of the following crop-late rice, mainly as follows: 1. Interception volume and decrease light reflectance When the intercropping corn density was 2000 plants per acre, the light-cut rate at 2/3 of soybean plants increased by 3.2- 9.8% on average compared with single-cropped soybean and the light reflectance at the top of compound population decreased by 0.9%. Increased day temperature, lower night temperature, increased temperature and increased humidity Soybean, pod (late May ~ late June), intercropping 2/3 field soybean plant daytime temperature is higher than the same period of high temperature of 0.1 to 4.4 ℃ , While single for the same height of soybeans