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绿肥,特别是豆科绿肥,其肥效早已众所周知,但其对增加土壤有机质方面的作用,则仍有着不同的见解,国外一些研究资料曾指出,由于绿肥的激发效应加速了原土壤中有机质的分解,因而施用绿肥往往不能有效的增加土壤的有机质积累。在我国也有这种情况,一些向有冬种绿肥习惯的地区,虽然每年一茬压青绿肥,但在通常用量用法下,往往只是起到当季作物的基肥作用,土壤有机质的含量并没有明显的增加。绿肥一般含有较丰富的有机质,它应该是土壤有机质补充的良好给源,绿肥的效果,应该包括对作物提供养分和增加土壤有机质培肥土壤两个方面。因此,有效的绿肥施用技术,应该是既能均衡持续的向作物提供养分,又能较好的增加土壤有机质,培肥地力。为了探索加速有机质积累的途径,从1975
Green manure, especially leguminous manure, has been well known for its fertilizer effect, but it still has different opinions on the role of soil organic matter. Some foreign studies have pointed out that due to the stimulating effect of green manure accelerates the decomposition of organic matter in the original soil , So the application of green manure often can not effectively increase the accumulation of soil organic matter. In our country, there are some cases, some to winter green manure habitat area, although a single crop of green manure, but under normal usage, often only play a role of seasonal crops, basal fertilizer, soil organic matter content and no significant Increase. Green manure generally contains abundant organic matter, which should be a good source of organic matter supplements to the soil. The effect of green manure should include both the supply of nutrients to the crop and the fertilization of soils by the soil organic matter. Therefore, an effective green manure application technology should not only provide a balanced and sustainable supply of nutrients to crops, but also increase soil organic matter and soil fertility. In order to explore ways to accelerate the accumulation of organic matter from 1975