贵州省岩溶山区旱坡耕地梯化的环境效应研究

Environmental Effect of Terraced Field Construction on the Arid Hillside Land in Karst Mountainous Areas in Guizhou Province

1997～ 1999年 3年时间 ,在田间生产条件下 ,研究贵州岩溶山区旱坡耕地梯化的环境效应 ,结果表明 :可防治水土流失和石漠化扩展 ;为大于 2 5度的旱坡耕地退耕还林 ,准备了较好的立地条件 ;提高小于 2 5度旱坡耕地的粮食作物产量近 2 0 % ,为陡坡耕地顺利退耕提供物质保障 ;本旱坡耕地梯化技术 ,操作简便、易行 ,投资少 ,见效快。

In 1997～1999, a three year field experimental study on the environmental effect of terraced farmland construction on the arid hillside land in Guizhou karst mountainous areas was conducted. The experimental results showed that soil & water erosion, stone & sand spread and desertification can be prevented, which makes good preparation for returning farmlands to forests and grassland on the slope land with more than 25°. The crop yield of the arid hillside land with less than 25° can be increased by twenty percent(20%), which provides good conditions for slope farm land to return farmland to forest and grass. This arid hillside land terraced technology is simple and feasible with less investment and quick return.