不同土壤类型对玉米根系干重变化及其分布的影响  

Dynamic of Dry Weight of Maize Roots and Root Distribution in Two Soils

作　　者：杨青华[1] 高尔明[1] 马新明[1] 

机构地区：[1]河南农业大学农学院,河南郑州450002

出　　处：《土壤通报》2001年第5期238-240,共3页Chinese Journal of Soil Science

基　　金：国家"九五"重大攻关项目"豫东南砂姜黑土区域治理与农业综合开发研究和示范"的部分内容

摘　　要：利用根系双向切片法，研究了潮土与砂姜黑土两种土壤类型玉米根系干重的动态变化及其在土层中的分布．结果表明：两种土壤类型对玉米根系干重及其分布的影响差异较大．砂姜黑土玉米单株根系干重较大，且增加与减少时间较早，下扎速度快，深层根量多；而潮土玉米单株根系干重较小，且增加与减少时间较迟，下扎速度慢，整个根系主要集中分布于０～２０ｃｍ土层．We studied the dynamic of maize root dry weight and root distribution in fluvo-aquic soil and Shajiang black soil. The result showed that in shajiang black soil maize root dry weight per plant was higher than in fluvo-aquic soil, and the time for roots to change were earlier in the same manner. The roots penetrated into deep layers also more quickly and much more roots were distributed in the deeper soil layers in Shajiang black soil than in fluvo-aquic soil.

关 键 词：潮土 砂姜黑土 玉米 根系干重 土壤类型 

分 类 号：S513.061[农业科学—作物学]