在苏南极江、昆山、江阴、无锡等地,农民一向有用稻草灰垫圈的习惯.群众对于稻草灰垫圈总的认识是:质量高,用于水稻基肥发稞快,肥效持久,用做追肥3—5天就可得力,同时对土壤改良效果快,松土作用好.以上这些说法似乎与过去一般队为稻草灰垫圈会引起氮素损失有违,且迄今尚无试验证明.为了弄清问题,更好地指导农业生产,我们开始进行了如下的稻草灰垫圈试验. In southern Jiangsu, Kunshan, Jiangyin, Wuxi and other places, peasants have always had the habit of straw washer ash. The general understanding of the straw ash washers: high quality, for rice base fat hair fast, long lasting, used as fertilizer 3 -5 days can be effective, at the same time on the soil improvement effect is quick, loose soil effect.This statement seems to be used in general with straw gray gasket will cause nitrogen loss contrary to, and so far no test proved that in order to clarify the problem , To better guide agricultural production, we started the following straw ash washer test.