论文部分内容阅读
等高带状耕作,也叫“横坡带状耕作”。其做法是:把坡地沿等高线方向分成若干带,间隔横向耕作(间隔—带耕—带),耕后保持沟垄,以节节阻滞径流。据山西省水保所1985年在中阳县设点观测:坡度27°,坡长20m,带1m,横向耕作带种2行玉米,不耕带点种绿豆,对照田按常规耕作配置。当年产流降雨量为87.3mm,横坡带状耕作比对照田分别减少径流量32.8％,减少冲刷量51.8％,增产10.8％。
Contour belt farming, also known as “Heng slope strip farming.” The approach is to divide the slope along several contours into horizontal zones with horizontal tillage at intervals (interval-belt tillage-belt) and furrow-furrow maintenance to prevent runoff. According to Shanxi Provincial Water Inspectorate set up in Zhongyang County in 1985 observations: slope 27 °, slope length 20m, with 1m, horizontal farming with two rows of corn, non-point plowing mung bean, control field according to conventional farming configuration. In the same year, the runoff rainfall was 87.3mm, and the transverse slope tillage reduced the runoff by 32.8% and the erosion by 51.8% and 10.8% respectively compared with the control field.