1.增产原因。 夏大豆经过摘心后,地上部强制长出两个主茎,从而单株有效分枝数明显增加,单株荚数、单株粒数也增加,空秕荚率明显降低,这是大豆摘心技术增产的一个重要原因。 大豆主根切断后,主根生长受到抑制,侧根大量分生,向四周伸展,支 1. Increase production reasons. After the topping of summer soybean, the two main stems were forced to grow on the shoots, and the number of effective branches increased significantly. The number of pods per plant and grain per plant also increased, and the pod rate of pods increased significantly. This was the technique of soybean topping An important reason for increasing production. After cutting the main roots of soybean, the growth of main roots was inhibited, a large number of lateral root meristem, extending to the surrounding branch