干旱与渍涝对砂姜黑土玉米根系干重变化及其分布的影响  

Effects of Drought and Waterlogging on Root Dry Weight and Its Distribution of Maize in Shajiang Black Soil.

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,郑州450002

出　　处：《生态学杂志》2000年第3期28-31,共4页Chinese Journal of Ecology

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：Under the conditions of drought and waterlogging,the dynamic of root dry weight and its distribution were studied with the method of root cutting collection in shajiang black soil. The result showed that root dry weight and its distribution were largely affected by drought and waterlogging,especially the later. During a drought,root dry weight of maize per plant was higher, and the time of root dry weight increase and decrease were earlier, the speed of roots spreading into deep soil were quicker and many roots were distributed in deeper soil layer. While during a waterlogging, the result was contrary to the above.Under the conditions of drought and waterlogging,the dynamic of root dry weight and its distribution were studied with the method of root cutting collection in shajiang black soil. The result showed that root dry weight and its distribution were largely affected by drought and waterlogging,especially the later. During a drought,root dry weight of maize per plant was higher, and the time of root dry weight increase and decrease were earlier, the speed of roots spreading into deep soil were quicker and many roots were distributed in deeper soil layer. While during a waterlogging, the result was contrary to the above.

关 键 词：玉米 砂痿黑土 根系干重 根系分布 干旱 渍涝 

分 类 号：S154[农业科学—土壤学]