过去许多象豆麦间种、大豆与马铃薯间种、大豆与油菜间种、大豆与甜菜间种等研究结果,都证明了建立有利于改善大豆通风透光条件的复合群体,是提高大豆光能利用率,增产大豆的重要措施。据试验观察,在高产栽培条件下,对清种大豆来说,不同成熟期生态 In the past, researches such as the intercropping of bean and wheat, the planting of soybean and potato, the intercropping of soybean and rape, the planting of soybean and sugar beet, proved that the establishment of composite groups conducive to improving the ventilation and light of soybean is the key to improving the light energy Utilization, soybean production an important measure. According to the experimental observation, under the conditions of high yielding cultivation, to the clear-growing soybean, the different mature ecological