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通过定点、定位、定坡度、定土壤类型 ,于 1997～ 1999年在贵州省长顺县凯佐乡设置了不同耕作栽培技术的试验研究。结果表明 :黔中黄壤丘陵旱坡地 (坡度 11～ 13°)不同耕作栽培技术对水土流失及作物产量影响极大。顺坡平作水土流失最大 ,横坡少耕最小。作物产量最高的为横坡聚土盖膜 ,其土壤侵蚀量达无明显侵蚀的国家标准。土壤侵蚀与降水径流同步发生 ,主要集中于每年的 6月份 ,土壤侵蚀量占全年的 2 / 3以上。
Through fixed point, location, slope and soil type, different types of tillage cultivation techniques were set up in Keishu Township, Changshun County, Guizhou Province from 1997 to 1999. The results showed that different tillage and cultivation techniques on the dry slope land (slope 11 ~ 13 °) in the yellow soil hilly area of Guizhou Province had a great impact on soil erosion and crop yield. Landslides for the largest soil erosion, cross slope less tillage. The highest crop yield was transversal slope polygamy, whose soil erosion reached the national standard without obvious erosion. Soil erosion and precipitation runoff occurred simultaneously, mainly in June each year, soil erosion accounted for more than 2/3 of the year.