随着耕作制度的改革,复种指数的提高,作物产量的增加,一些地方由于有机肥料施用不足,出现了土壤肥力下降的情况。为了解决肥料不足和用地与养地的矛盾,我们就利用增、间、套发展绿肥的问题进行了调查研究,现将情况整理如下: 一、稻、麦(油)两熟田增种短期绿肥,解决小春底肥:我区现有稻、麦(油)两熟田200多万亩,历年在8月中旬中稻收后闲两个多月才种小春。为利用这段时间的光热资源,我们从1973年开始研究绿肥品种和栽培技术。我们的作法是:中稻收后增种短期绿肥田菁,采用谷桩点播、施磷、灌水等措施,使生长期50—60天的鲜草亩产达1,500— With the reform of the tillage system, the improvement of the multiple cropping index and the increase of crop yields, the decline of soil fertility appears in some places due to insufficient application of organic fertilizers. In order to solve the problem of insufficient fertilizers and the contradiction between land use and land requisition, we conducted a survey on the problems of green manure increase, inter-crop and land cover development. The situation is summarized as follows: First, short-term green manure is added to paddy and wheat (oil) Solve the spring at the end of fertilizer: My area of ​​existing rice, wheat (oil) two mature fields more than 200 acres, over the years in mid-August after receiving more than two months of idle rice in spring. In order to make use of the light and heat resources of this period, we started to study green manure varieties and cultivation techniques from 1973. Our approach is to add short-term green manure after harvesting after mid-season, using on-demand plow, phosphorus, irrigation and other measures to make the growth of 50-60 days of fresh grass per mu up to 1,500-