摘要
通过近10年来在黄土高原地区的定点试验和示范,山地水平沟已在陕、甘、宁、蒙、晋等省区大面积推广。试验、调查结果表明,山地水平沟种植具有拦截径流,防止水土流失,提高土壤肥力,增强作物抗旱、御寒能力等多项功能。在年均坡面径流深12mm 的情况下,每公顷水平沟耕地可有效减少水、土流失1300m^3 和650t。由于水平沟种植是将种、肥同播于沟底稳墒层,人为地为作物生长建立了营养供应层,水、肥供应较为充分,作物产量较一般坡耕地提高35%～300%。
Through experiments and demonstrations at fixed places in the last 10 years,the levelled gullies in hilly area have been popularized in a large scale in Shaanxi,Gansu,Ningxia,Inner Mongolia and Shanxi.It is shown by the results of experiments and investigation that the plant of levelled gullies in hilly area has mul- ti-functions of holding runoff,preventing soil and water loss and increasing soil fertility and crop capabilities of drought resistance and cold resistance.When the average annual depth of runoff on slope surface is 12 mm.the water and soil loss of farmlands with the levelled gullies can be effectively reduced by 1300 cubic meters and 650 tons per hectare respectively.Because the way of plant of levelled gullies is to put seed and manure at a stable moisture-content layer of gully bottom,artificially creating a layer of nutrition supply for the growth of crops,the output Usually is 35%-300% higher than that of common slope land.
出处
《人民黄河》
CAS
北大核心
1992年第8期21-23,共3页
Yellow River
关键词
山地水平沟
黄土高原
水土保持
planting in leveled gullies
test and populization
slope land
loess plateau
