干旱胁迫对大豆根系发育影响初报  

Effect of Drought Stress at Different Growth Stages on Root Development of Soybean

作　　者：闫春娟[1] 王文斌[1] 孙旭刚[1] 曹永强[1] 宋书宏[1] 袁玉璐[1] 

机构地区：[1]辽宁省农业科学院作物研究所,辽宁沈阳110161

出　　处：《大豆科学》2012年第6期924-926,931,共4页Soybean Science

基　　金：国家大豆产业技术体系资助项目(CARS-004-CES11)

摘　　要：盆栽条件下,设置干旱、轻度干旱和适宜水分处理,探讨了不同生育时期干旱胁迫对大豆根生物量、根冠比、根长、根表面积和根体积的影响。结果表明:在同一控水时期,随着土壤含水量的增加,根冠比逐渐降低。营养生长期(V2～R1)控水,随着土壤含水量的增加,根生物量、根表面积逐渐增加,且适宜水分显著高于干旱,但与轻度干旱间无显著差异,各水分处理间的根长、根表面积无显著差异。花荚期(R1～R5)控水,轻度干旱的根生物量、根体积显著高于干旱处理,适宜水分的根长、根表面积显著高于干旱和轻度干旱处理。鼓粒期(R5～R7)控水,根生物量、根长、根表面积、根体积3个处理间差异不显著。Soil drought stress directly affect soybean root system.Under pot condition,three water treatment of drought（W1）,slight drought（W2）and normal water supply（W3）,which was accounting for 50%,60% and 80% of field water capacity,were adopted at V2-R1,R1-R5,R5-R7,respectively,and root traits were determined.Root to shoot ratio decreased with the increasing of soil moisture when water was controlled at the same growth stage.When soil water content was controlled at V2-R1,root biomass and root surface area increased with the increasing of soil moisture,and was significantly higher under W3 than W1;No significant difference for root length and root surface area were found between three treatments.When soil water content was controlled at R1-R5,root biomass and root volume of W2 were significantly higher than W1,while root length and root surface area in W3 were significantly higher than W1and W2.When soil water content was controlled at R5-R7,root biomass,root length,root surface area and root volume had no significant difference between three treatments.

关 键 词：水分胁迫 根系特性 大豆 

分 类 号：S565.1[农业科学—作物学]