辽西半干旱地区深松中耕对作物产量的影响及其作用机理研究  

Effeet of subsoiling on crop yield in semi-arid area of west Liaoning and its mechanism

作　　者：王仕新[1] 崔剑波[1] 庄季屏[1] 

机构地区：[1]中国科学院沈阳应用生态研究所

出　　处：《应用生态学报》1996年第3期267-272,共6页Chinese Journal of Applied Ecology

基　　金：国家"八五"科技攻关项目

摘　　要：对辽宁西部半干旱地区深松中耕对作物产量影响及作用机理的研究表明，深松打破了犁底层，减小了土壤容重及穿透阻力，增加了表层及亚表层土壤的孔隙度．深松土壤水分人渗可达８０ｃｍ，大豆根系深度增加３．６～４．０ｃｍ，大豆产量和水分利用效率分别增加２７．７～３４．５％和１６．１％，在干旱年份玉米增产７．９％．The study shows that subsoiling can break up tillage pan,decrease penetration resistance and soil bulk density,increase subsoil porosity,and results in a deeper water infiltration depth,which is up to 80 cm.After subsoiling,the root length of soybean is increased by 3.6～4.0 cm,its yield and water use efficiency are respectively increased by 27.7～34.5% and 16.1%,and in drought year,maize yield is increased by 7.9%.

关 键 词：作物生态学 土壤深松 半干旱区 中耕 作物产量 

分 类 号：S365[农业科学—作物栽培与耕作技术]