豆科绿肥具根瘤,有固氮功能,可利用空中的氮气,合成含氮有机物质,所以能在禾本科作物难以生长的贫瘠土壤上正常发育,取得较好的收获量。豆科绿肥植株含氮量高,一般为鲜草的千分之四到五,是生物养地的好作物;它含有较多有机养分,又是牲畜的好饲草。过去,在豆科绿肥根瘤方面,我们曾做过一些工作,近两年又做了些试验研究与调查。现将资料整理于下;同时,谈点看法, Legume green manure nodules, nitrogen fixation function, the use of nitrogen in the air, the synthesis of nitrogen-containing organic matter, it can be difficult to grow in the gramineous poor soil normal development and achieve better harvest. Leguminous green manure plants with high nitrogen content, usually four to four per thousand of fresh grass, is a good crop of biological habitat; it contains more organic nutrients, but also a good forage for livestock. In the past, we have done some work on legume green manure nodules, and in the past two years we have done some experimental researches and investigations. Now the data is organized in the next; the same time, talk about the point of view,