论文部分内容阅读
一、整地的作用在农业上,深翻改土和精耕细作,是提高作物产量的重要措施之一。造林整地,则是提高造林成活率,改善林木生长条件的有力措施。特别是在水土流失严重,气候干旱的黄土高原,细致整地则有重大的作用,其主要作用有以下几方面: 1.拦截径流,蓄水保墒在水土流失严重的黄土高原,一般整地方法都具有简易的水土保持工程性质,可以大部或全部地拦截径流。同时,经过整地翻松了土壤,使其孔隙度增加,容重变小,透水性增强,能够更多的接纳天然降水。经过整地的土壤含水量比荒坡一般要提高20～80％。
First, the role of land preparation In agriculture, deep soil improvement and intensive farming is one of the important measures to improve crop yields. Afforestation and site preparation are the powerful measures to improve the survival rate of afforestation and improve the conditions of tree growth. Especially in the loess plateau with serious soil erosion and arid climate, meticulous land preparation plays a significant role. Its main functions are as follows: 1. Interception of runoff, water storage and soil moisture In the Loess Plateau with serious soil erosion, the general land preparation methods all have Simple nature of water and soil conservation projects, most or all can intercept runoff. At the same time, after soil preparation loosen the soil, the porosity increases, the bulk density becomes smaller and the water permeability increases, so that more natural precipitation can be accepted. After soil preparation of soil moisture than the barren slope generally increase 20 ~ 80%.