Conservation cultivation in winter, such as cover crops and non-tillage, can increase water content of soil, suppress soil erosion, and scavenge soil residual nitrogen.

• 摘要冬季种植覆盖作物结合免耕法构成的保护性耕作法，在冬春季土壤休闲时期可提高土壤含水率，抑制土壤风蚀，回收土壤残留氮素；