豆科绿肥具有强大的根系和较多的根瘤,能把空气中游离氮素转化为植物可利用的氮素,起到了一个小化肥厂的作用。豆科绿肥广泛利用太阳的光能和热能,利用空气和土壤,能为土壤制造并积累了大量的有机质肥料,具有很大的意义。有些试验证明:翻压绿肥,特别是和过磷酸钙一起进行翻压的时候,绿肥的有机质仍然能在土壤中继续固定氮素,并且以降低亚硝酸铵形成的方法,而阻止氮素在土壤中的损失。据资料介绍:全世界土壤中的氮素,几乎都是由有机质在日光和磷酸盐的作用下,在缓慢地氧化过程中所固定的大气氮素而创造的。此外新的有机质对耕作土壤所具有的 Legume green manure has a strong root system and more nodules, can turn the nitrogen in the air into plant available nitrogen, played a small fertilizer plant. Legume green manure make extensive use of solar energy and heat, the use of air and soil, for the soil to create and accumulate a large number of organic fertilizer, of great significance. Some tests have shown that when the green manure is turned on, especially with the superphosphate, the organic matter of the green manure can still continue to fix the nitrogen in the soil, and the method of reducing the formation of ammonium nitrite can prevent the nitrogen from moving in the soil In the loss. According to the information: Nitrogen in soils all over the world is almost always created by the slow oxidation of atmospheric nitrogen by the organic matter under sunlight and phosphate. In addition, the new organic matter possesses for cultivated soils