草木樨是我省主要的绿肥作物。我省辽西北地区,以清种方式与粮食作物进行“二草二粮”或“一草二粮”轮作。随着向日葵种植面积的扩大,又出现了“粮——油——草”轮作方式。但是,由于这类地区用来轮作的地块一般都是土质瘠薄,普遍缺磷,草木樨生长很差,不少地块第一年鲜草产量只有四、五百斤,压青量很少,地下部根系发育不良,根瘤少,固氮量低,不能充分发挥其改土肥田的作用。 Grass mulberry is the main green manure crop in our province. Liaoning province in the northwest of Liaoning Province, with a clear kind of way and food crops for “two straw two grain” or “a grass two grain” rotation. With the expansion of sunflower planting area, there has been a “grain - oil - grass” rotation mode. However, since the plots used for rotation in such areas are generally poor in soil quality and generally lack phosphorus, the growth of vegetation is very poor. In the first year of many plots, the yield of fresh grass is only 4 to 500 kilograms, , Underground root system dysplasia, less nodules, low nitrogen fixation, can not give full play to its role in soil amendments.