【摘要】 定西地区属半干旱黄土丘陵沟壑区,农业生产发展缓慢的主要原因是干旱缺水和水土流失。经坡地田间聚流技术试验研究表明:渗水孔耕作法,不仅能增强天然降雨入渗,而且还能增加入渗深度,减少地表蒸发,提高了降雨利用率和水分利用效率,达到了保土、增收及合理利用水土资源的目的。更多还原

【Abstract】 There is a slow speed of developing agricultural production in loess hilly gully areas ofDingxi. The major reasons that influence the speed are drought, less precipitation and soil andwater loss. Through the experiments,it was shown that the tillage measures which collect runofffor infiltrating into the hole can not only retain rainfall,but also increase the depth of infiltrationand decrease evapotranspiration of soil surface in order to improve the utilization of rainfall andsoil moisture. The objectives that preserve the soil,increase the yield and return,and utilize na-ture resources rationally can be achieved。更多还原