旱坡地大水平沟种植对养分流失和作物产量的影响

A Preliminary Study on Effects of Large Level Ditch on Nutrient Loss and Crop Production at Dry Sloping-land

通过在黄土丘陵区旱坡地布设大水平沟种植和常规平播种植的对比试验，初步研究了旱坡地大水平沟种植方式对养分流失和作物产量的影响。结果表明：卑坡地采用了大水平沟种植具有明显的减少水土流失和养分流失的功效及明显的增产效果。并对大水平沟的增产机理及大水平沟种植和常规平播种植的肥料利用效率进行了分析。

Control experiments on large level ditch and convention planting at dry slopingland of the loess hilly-gully region have been established to study effects of large level ditchplanting on nutrient loss and crop production. The results show that large level ditch planting has obvious effects of reducing soil and water loss and nutrient loss and increasing cropproduction. The mechanism of increasing crop production of large level ditch planting is analyzed. Meanwhile, fertilizer use efficiency and rainfall use effciency of large level ditch andconvention planting are also analyzed.