二年生草木樨是昭盟的主要绿肥品种,在干旱瘠薄地区适应性强,肥田效果显著,深受群众欢迎。但是有些地区的草木樨第二年不返青,因而挫伤了群众的积极性,有的甚至失去了种草的信心。为什么有的地区草木樨第二年不返青呢?据调查,主要原因有以下六条:第一,播种过晚,越冬前没有 Perennial broussonetia papyrifera is the main green manure variety of Zhaomeng, which has strong adaptability in arid and barren areas and significant effect of fertilizing. It is well received by the public. However, vegetation in some areas did not return to green in the second year, thus dampening the enthusiasm of the masses and some even losing the confidence of planting grass. Why do some areas in the second year does not revert green grass? According to the survey, the main reasons for the following six: First, sown too late before the winter