【摘要】 为探索适宜吉林省西部半干旱区淡黑钙土土壤的玉米秸秆还田模式，于2020-2021年吉林省白城市开展研究，设置秸秆离田、覆盖、碎混和深翻还田4个处理，探究不同秸秆还田方式对土壤理化性质的影响。结果表明，与秸秆离田相比，碎混和深翻还田降低土壤容重，降幅分别为1.5%～4.3%和0.7%～4.6%；覆盖还田土壤含水率增加5.7%～13.3%。秸秆还田提升土壤有机质含量，覆盖还田在0～<10 cm土层提升10.9%，碎混还田在10～<20 cm土层提升10.5%，深翻还田在20～30 cm土层提升7.8%。深翻还田提升土壤速效养分含量高，碱解氮、速效磷和速效钾分别平均提升9.1%、12.5%和8.3%。综合来看，秸秆深翻还田更有利于改善吉林省西部半干旱区淡黑钙土土壤理化性质。更多还原

【Abstract】 In order to explore the maize straw returning mode suitable for the light chernozem soil in the semi-arid area of western Jilin Province, the study was carried out in Baicheng City, Jilin Province from 2020 to 2021. Four treatments of straw leaving field, mulching, crushing and mixing, and deep tillage were set up to explore the effects of different straw returning methods on soil physical and chemical properties. The results showed that the soil bulk density decreased by 1.5%-4.3% and 0.7%-4.6%, respectively, compared with the straw leaving field. The soil moisture content increased by 5.7%-13.3%. Straw returning increased soil organic matter content. Mulching increased soil organic matter content by 10.9% in the 0-10 cm soil layer, mixing increased soil organic matter content by 10.5 % in the 10-20 cm soil layer, and deep plowing increased soil organic matter content by 7.8% in the 20-30 cm soil layer.Deep plowing increased the content of available nutrients in soil, and the contents of alkali-hydrolyzable nitrogen,available phosphorus and available potassium increased by 9.1%, 12.5% and 8.3% respectively. On the whole, deep straw returning is more conducive to improving the physical and chemical properties of light chernozem soil in the semi-arid area of western Jilin Province.更多还原