气象与环境学报Issue(5)：83-89,7.DOI:10.3969/j.issn.1673-503X.2014.05.012
华北平原冬小麦根系在土壤中的分布研究
Spatial distribution of winter wheat root in soil under field condition in North China plain
摘要
Abstract
Development of wheat root system in soil under field condition is an indispensable parameter,which could quantify accurately the reaction between vegetation and climate and provide references for scientific manage-ment of wheat production and development of water saving agriculture.Using a large root monitoring system at Gucheng ecological environment and agriculturual observation station,roots of wheat species“NO.22 Jimai”were observated,including root length,root length density,root dry-weight density and root diameter.Vertical distribu-tions of roots were analyzed.The results indicate that the root length and root dry-weight decrease with increase of soil depth.There are four different treatments in this experiment,i.e.severe drought,light/middle drought,suitable moisture and heavy moisture.Correlation coefficients of root lengths between four treatments and a control experi-ment are 0.9 1 ,0.29 ,0.90 and 0.86 respectively.Root growth can be affected by soil moisture conditions.It is conducive to increase the amount of wheat root in upper layers and root biomass under sufficient soil water condi-tion,while the inverse is true under water stress.Light drought is favorable to extend wheat roots in middle/lower layer soil.Root length density and root dry-weight density have a significant positive linear correlation in various soil depths.Root diameter decreases with increase of soil depth.关键词
根系分布/根长/根长密度/根重密度/根系粗度Key words
Root system distribution/Root length/Root length density/Root dry-weight density/Root diameter分类
农业科技引用本文复制引用
廖荣伟,刘晶淼,白月明,安顺清,梁宏,卢建立,乐章燕,曹玉静..华北平原冬小麦根系在土壤中的分布研究[J].气象与环境学报,2014,(5):83-89,7.基金项目
国家自然科学基金项目（31071322）资助。 （）
