农田秸秆覆盖是秸秆还田的一种新方式。在覆盖当季,秸杆在地面形成保护层,能够减少水土流失,提高土壤蓄水保墒能力,缩小地温日较差,减轻雨水对土壤的冲击、淋洗,消除阳光对地面的曝晒,提高田间CO_2浓度,增强作物光合效率。在当季作物收获后,覆盖的秸秆被耕翻入土,又能 Farmland straw mulching is a new way of straw returning. Covering the season, the straw forms a protective layer on the ground, which can reduce water and soil loss, improve the capacity of soil water storage and soil conservation, reduce the daytime temperature difference, reduce the impact of rainwater on the soil, rinse, eliminate the sun exposure to the ground and improve the field CO 2 concentration, enhance crop photosynthetic efficiency. After the crop is harvested in the season, the straw covered is plowed into the soil, but also