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近年来,由于干旱、少雨,土地沙化面积逐年扩大,沙尘暴等自然灾害频发,甘肃省受风沙危害而弃耕的农田逐年增加。传统的耕作使地表裸露,土层疏松,蒸发严重,是造成水蚀和风蚀的重要原因之一。大力发展侵蚀环境下的少免耕技术,有效遏止沙尘暴的肆虐,减少水土流失,促进传统农业向现代农业转变,具有重要而深远的意义。1.保护性耕作的特点保护性耕作是一种新型的旱地耕作法,主要由免耕播
In recent years, farmland abandoned by harms caused by wind and sand in Gansu Province has been increasing year by year because of drought, lack of rainfall and the increasing area of land desertification and frequent natural disasters such as sandstorms. Traditional farming makes the surface bare, loose soil, evaporation is one of the important causes of water erosion and wind erosion. It is of great and far-reaching significance to vigorously develop the technology of reducing no-till in the erosion environment, effectively curb the raging sandstorms, reduce soil and water loss, and promote the transformation from traditional agriculture to modern agriculture. 1. The Characteristics of Conservation Tillage Conservation tillage is a new type of dry farming method mainly consisting of no-till