保护性耕作抑制季节性裸露农田扬尘的效果研究

Reach on Effect of Conservation Tillage on Suppressing Dust in Seasonal Bare Farmland

为解决北京地区季节性裸露农田扬尘严重的问题,在昌平区开展保护性耕作和传统耕作两种处理模式的对比试验。结果表明:实施保护性耕作能够提高表层土壤平均含水率1.2%、增加地表覆盖率16.2%、减少农田土壤风蚀量38.34%、减少0~60 cm近地表大颗粒农田扬尘21.2%和60~150 cm远地表中小颗粒农田扬尘18.4%,抑制裸露农田扬尘效果显著。

In order to solve the serious dusting problem of seasonal bare farmland in Beijing,a comparative experiment of conservation tillage and traditional tillage was carried out in Changping district.The results show that:Conservation tillage can increase the average surface soil moisture content by 1.2%,increase the surface coverage by 16.2%,reduce the soil drifting by 38.34%,and reduce the large dust particles near the surface of 0~60 cm by 21.2%and the small and medium dust particles at the surface of 60~150 cm by 18.4%.The effect of dust suppression on bare farmland is remarkable.