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红壤是我国重要的土地资源,遍于南方15个省(区)占全国土壤22.7%,新垦酸性红壤地区引种豆科作物时,需要接种根瘤菌剂,这样就遇到了根瘤菌能否耐酸和存活的问题,为了提高根瘤菌的结瘤率和固氮效果,必须选育耐酸根瘤菌株以适应酸性土壤条件,这样才能获得高产。绛三叶草(Trifolium incarna tum L)系欧美普遍种植的越年生豆科绿肥,1973年江苏省植物所从西德引入我国,它具有鲜草
Red soil is an important land resource in China. It occupies 22.7% of the total soil in 15 provinces (regions) in the south. When the newly reclaimed acid red soil area is introduced with legume crops, it needs to inoculate rhizobia, In order to improve the nodulation rate and nitrogen fixation of rhizobia, it is necessary to cultivate the acid-fast rhizobium strain to adapt to the acid soil condition so as to obtain high yield. Crimson clover (Trifolium incarna tum L) Europe and the United States is widely planted annual legume green manure, plant in Jiangsu Province in 1973 from West Germany introduced to our country, it has fresh grass