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在我国南方各省,绿肥作物的栽培面积很广,是一种很好的,含氮量丰富的有机质肥料。在华中和华南各省,利用绿肥来解决普遍缺肥问题和改善土壤耕性是经济而有效的办法。同时,绿肥作物对於磷肥的分解力较强,因此在绿肥田中施用磷肥可以对後作物打下良好基础。 但是,对於绿肥作物的有效利用,目前还存在着许多问题,如什么时候割青最好,什么时候它能供给更多的鲜草和氮素等。总之,绿肥适当压青期是有待研究解决的一个主要问题。过去许多文献中曾
In our southern provinces, green manure crop cultivation area is very wide, is a good, rich in nitrogen-containing organic fertilizer. In central and southern provinces of China, using green manure to solve the problem of general shortage of manure and improving soil plowability are both economically and effectively ways. At the same time, the green manure crop has a strong ability of decomposing phosphate fertilizer, so applying phosphate fertilizer in the green manure field can lay a good foundation for the latter crop. However, for the effective utilization of green manure crops, there are still many problems, such as when cutting the best, when it can provide more fresh grass and nitrogen and so on. In a word, proper pressing of green manures is a major problem to be solved. In the past many literature once