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秸秆是目前及今后农田氮、磷、钾素和有机质的主要来源。湖州地区1986年开始在麦(油菜)稻稻三熟制稻田开展秸秆还田,每年有110万亩左右。秸秆还田在水稻有深施(20cm)和面施两种方法。为探讨秸秆深施与面施对秸秆氮磷钾养分释放,水稻增产效果,及对土壤肥力的影响,进行了模拟田间秸秆还田实际状况的比较研究。1材料和方法1.1试验处理1.1.1秸秆中氮磷钾养分释放试验。用尼龙网袋装
Straw is the main source of nitrogen, phosphorus, potassium and organic matter in farmland at present and in the future. In 1986, Huzhou started to carry out straw-returning on the rice (rapeseed) rice-three-paddy rice fields with an annual output of about 110 million mu. Straw in the rice has deep facilities (20cm) and surface facilities in two ways. In order to investigate the effects of straw deep application and application on crop nitrogen, phosphorus and potassium nutrient release, rice yield increase and soil fertility, a comparative study was conducted on the actual conditions of straw returning to field. 1 Materials and methods 1.1 Test Treatment 1.1.1 straw nitrogen, phosphorus and potassium nutrient release test. Use nylon mesh bag