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通过对淤灌农田土壤生物活性的研究看到：各种植物残体、厩肥和垃圾肥对土壤的生物活性都有明显的刺激作用，对土壤呼吸强度的变化快捷短暂，１５ｄ左右出现峰值；土壤酶活性可以较长时间保留下来，一季作物后施厩肥土壤转化酶、脲酶、碱性磷酸酶活性分别比原土增加３６．６％、１１．３％和６５．８％。连续３年施用有机肥，土壤酶活性与无肥区差距不断加大，其中脲酶的累积效果明显。还田植物残体由于成分的差异对各种酶活性的影响也不一致。秸秆的酶促作用大于根茬，含热水溶物较多的高粱秸、玉米秸强烈促进了转化酶活性提高；豆秸对磷酸酶活性有利
The results showed that all kinds of plant residues, manure and garbage had obvious stimulating effects on the biological activity of soils. The change of soil respiration intensity was short-lived and peaked at about 15 days. Soil The activity of soil invertase, urease and alkaline phosphatase increased by 36.6%, 11.3% and 65.8% respectively compared with the original soil after the first crop. The application of organic fertilizer for three consecutive years, the difference between soil enzyme activity and non-fertilizer area increasing, of which the cumulative effect of urease is obvious. Residues to plant residues because of the differences in composition of various enzyme activity is not the same. Straw enzymatic action is greater than stubble, sorghum stalks with more hot water soluble matter, corn stalks strongly promote the activity of invertase; soybean straw is good for phosphatase activity