１９８２～１９８８年在新垦红壤稻田中进行微区定位试验。结果表明，对稻—稻—麦三熟制中早稻茬年亩施１０００ｋｇ稻草，前三年土壤有机质净增１．４０ｇｋｇ－１，后三年则净增３．１０ｇｋｇ－１，为初垦时的五倍，已接近浙江省高产土壤有机质含量。稻草区与化肥区（Ｋ２Ｏ１６．５ｋｇ／亩、年）的土壤速效钾含量相近，均保持在８００ｇｋｇ－１左右，稻草还田可以代替化学钾肥。 In 1982 ~ 1988 in the red rice paddy fields for micro-regional positioning experiment. The results showed that in the rice-rice-wheat three-cropping system, 1000kg straw was applied per mu in the early rice cropping season, the soil organic matter net increased 1.40gkg-1 in the first three years and 3.10gkg-1 in the latter three years, Five times, close to the high yielding soil organic matter content in Zhejiang Province. The available potassium content in the straw and chemical fertilizer areas (K2O16.5kg / mu, year) is similar to that of 800gkg-1, and straw can replace chemical potassium fertilizer.