连续七年盆栽试验结果表明：施用有机肥15、30、45、60、90t/hm2降低了苏打盐碱土壤容重，增加了土壤总孔隙度；玉米秸秆还田2、4、6t/hm2降低了土壤容重，增加了土壤总孔隙度。有机肥与秸秆还田都增大了“土壤水库”，降低了土壤pH值，增加了土壤有机质、碱解氮、速效磷和速效钾含量，土壤理化性质得到全面改善的同时减轻了大气温室气体效应；促进了玉米生长发育，增加了生物量及籽粒产量。最佳处理是有机肥90t/hm2。
英文摘要:
Results from pot experiment for continuous seven years showed: The application of 15、30、45、60、90 t/hm2 of organic manure decreased the soil bulk density of soda saline-alkali soil, increased total soil porosity; the returning of maize straw of 2、4、6 t/hm2 to soil decreased soil bulk density, increased total soil porosity. Applying organic manure and returning maize straw to soil both enlarged soil reservoir, decreased the soil pH values, increased the contents of soil organic matter, soil hydrolysis N, available P and available K; at the same times as the soil physical and chemical properties were in general improved, the greenhouse gas effect was reduced; both applying organic manure and returning maize straw to soil promoted the growth and development of maize, increased the biomass and maize grain yield. The best treatment was the application of 90t/hm2 of organic manure.
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