北方高寒地区的旱地绿肥白花草木樨(Melilotus alba),南移过淮河,在淮南丘陵低产水稻区种植,经过反复试验,证明是很有发展前途的.目前已在定远县朱湾公社等地,作为建设商品粮基地的一项改土增产措施,由点到面逐步扩大推广. 草木樨为什么要南移? 这个问题是在红花草北移之后还不能满足农业生产发展要求的情况下提出来的.1963年红花草在江淮之间扩大种植,对农业增产起了积极的作用,但是红花草对水肥条件要求较高,淮南地区尤其是定远、凤阳、嘉山、长丰等县,因为土壤瘠薄,又经常遭受干旱威胁,影响红花草进一步发展,因此要求有抗逆性更强、改土作用更大的绿肥来适应淮南地区的土壤和自然条件. Melilotus alba, a green manure in the northern part of the alpine region, migrated southwards through the Huaihe River and was planted in low-yielding rice areas in the hilly area of ​​Huainan. After repeated tests, it proved to be very promising. , As a measure to increase production of grain for the construction of commodity grain base, from point to surface and gradually expand the promotion .Why should we move south? This problem is in the red after the shift of grass north can not meet the requirements of the development of agricultural production put forward In 1963, the planting of safflower grass between JAC and Huaihe River increased greatly, but the safflower grass had higher requirement on water and fertilizer, especially in Huainan, Dingyuan, Fengyang, Jiashan, Changfeng and other counties because soil was infertile , And they are often subjected to the threat of drought and affect the further development of safflower grass. Therefore, it is required that green manures with stronger resistance and greater soil amendment be used to adapt to the soil and natural conditions in Huainan.