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以辽宁半干旱区旱田为研究对象,将0~20 cm土壤与20~40 cm土壤进行位置转换,探讨土层置换对土壤物理性质及土壤养分含量的影响。研究结果表明:土层置换后,10~30 cm土壤容重较常规耕作分别降低3.62%和5.11%;0~10cm与20~30 cm土壤含水量比常规耕作处理增大2.06%和6.82%;10~30 cm土壤导水率较常规耕作处理增加62.6%和219.2%;10~30 cm土壤碱解氮、速效钾、速效磷含量均高于常规耕作处理;玉米穗数、玉米出籽率、籽粒含水量以及玉米产量比常规耕作处理增加9.76%、4.67%、4.89%和8.56%。综上,应用土层置换技术,能够显著改善旱田土壤物理性状,提高养分有效性,为作物生长提供良好的土壤环境。
Taking dryland in semiarid area of Liaoning as the research object, the location of 0 ~ 20 cm soil layer and 20 ~ 40 cm soil layer was changed, and the effect of soil replacement on soil physical properties and soil nutrient content was discussed. The results showed that soil bulk density decreased by 3.62% and 5.11%, respectively, in 10-30 cm soil layer after soil replacement; soil water content in 0-10 cm and 20-30 cm soil layers increased by 2.06% and 6.82% respectively compared with conventional tillage treatment; The water conductivity of ~ 30 cm increased 62.6% and 219.2% compared with that of conventional tillage. The contents of available N, available K and available P in 10 ~ 30 cm soil were higher than those of conventional tillage treatment. The maize spike number, Water content and corn yield increased by 9.76%, 4.67%, 4.89% and 8.56%, respectively, over conventional tillage. In summary, the application of soil replacement technology can significantly improve the physical properties of upland soil, increase nutrient availability and provide a good soil environment for crop growth.