干旱地区农业研究2009，Vol.27Issue(4)：171-175,5.
保护性耕作对黄土高原春玉米田土壤理化特性的影响
Effects of conservation tillage on soil physicochemical properties in the spring maize area of the Loess Plateau
摘要
Abstract
The values of soil bulk density, water content and seven kinds of soil nutrie nt content (organic matter, total nitrogen, available nitrogen, total phosphorus , available phosphorus, total potassium and available potassium) were evaluated in an agricultural soil, located in the spring maize area of the Loess Plateau, with three treatments such as no tillage(NT), conventional tillage+straw retu rning(TS) and conventional tillage(CT), in order to study the effects of conse rvation tillage on the changes of physical and chemical properties of soil in th is zone. Samples were collected during the second year from the arable layer and four different stages. The results showed that the soil bulk density in the 0～ 10 cm soil depth under the treatment of no tillage was lower than that under con ventional tillage in prophase of maize growth, but had a larger increase in the later growing stage; compared to conventional tillage, no tillage made a signifi cant increase in soil water of 0～60 cm soil depth in the prophase of maize g rowth and 100～200 cm soil depth in the dough stage, and had a better effect on water storage; the contents of organic matter, total nitrogen, available nitroge n and available phosphorus in soil depth of 0～20 cm under conventional tillage were higher than those und er no tillage, but had bigger coefficients of variation, while no tillage kept a rising trend of stability in most soil nutrient contents and made a higher cont ents in total potassium and available potassium.关键词
黄土高原/保护性耕作/土壤容重/土壤水分/土壤养分Key words
Loess Plateau/conservation tillage/soil bulk density/soil water/soil nutrien t分类
农业科技引用本文复制引用
刘鹏涛,冯佰利,慕芳,苏旺,徐芦,蔡晓青,刘月仙,朱瑞祥,薛少平..保护性耕作对黄土高原春玉米田土壤理化特性的影响[J].干旱地区农业研究,2009,27(4):171-175,5.基金项目
农业部先正达农业科教及农村发展项目"黄土高原春玉米保护性耕作技术体系及配套机具研究" （）
