[1]闫春娟,王文斌,涂晓杰,等.不同生育时期干旱胁迫对大豆根系特性及产量的影响[J].大豆科学,2013,32(01):59-67.[doi:10.3969/j.issn.1000-9841.2013.01.014]
　YAN Chun-juan,WANG Wen-bin,TU Xiao-jie,et al.Effect of Drought Stress at Different Growth Stage on Yield and Root Characteristics of Soybean[J].Soybean Science,2013,32(01):59-67.[doi:10.3969/j.issn.1000-9841.2013.01.014]
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不同生育时期干旱胁迫对大豆根系特性及产量的影响

《大豆科学》[ISSN:1000-9841/CN:23-1227/S] 卷: 第32卷 期数: 2013年01期 页码: 59-67 栏目: 出版日期: 2013-02-25
Title:
Effect of Drought Stress at Different Growth Stage on Yield and Root Characteristics of Soybean
文章编号:
1000-9841(2013)01-0059-04
作者:
闫春娟; 王文斌; 涂晓杰; 王昌陵; 张立军; 杜强; 宋书宏
辽宁省农业科学院 作物研究所，辽宁 沈阳 110866
Author(s):
YAN Chun-juan; WANG Wen-bin; TU Xiao-jie; WANG Chang-ling; ZHANG Li-jun; DU Qiang; SONG Shu-hong
Crop Institute,Liaoning Academy of Agricultural Sciences,Shenyang 110866,Liaoning,China
关键词:
干旱; 产量; 根系特性; 大豆
分类号:
S565.1
DOI:
10.3969/j.issn.1000-9841.2013.01.014
摘要:
盆栽试验条件下,以辽豆18为材料,分别在V2～R1,R1～R5,R5～R7期设置3个控水处理,控水结束后取样测定根系性状,成熟后测定产量。结果表明:干旱影响大豆产量的形成,干旱(W1)胁迫引起产量下降的程度要高于轻度干旱(W2)。不同时期干旱(W1)引起产量下降程度为:鼓粒期>花荚期>营养生长期。干旱胁迫(W1)主要通过降低大豆的单株荚数从而降低单株产量。大豆的根长比例和根表面积比例主要为根系直径为0～1.0 mm的细根,分别约占总根长的90%和总根表面积的60%。大豆根体积的分配比例主要是根系直径大于4.5 mm的粗根,其根体积所占比例在48%以上。R1～R5和R5～R7控水大豆细根(根系直径为0～1.0 mm)的根长和根表面积分配比例较V2～R1控水时增加。干旱降低了植株中直径大于4.5 mm粗根的根长比例、根表面积比例和根体积比例。随着生育进程的推进,根生物量密度逐渐增加,土壤干旱胁迫降低了根生物量密度。
Abstract:
In order to investigate the effects of drought stress on yield and root characteristics in soybean,potexperiments were carried out in Shenyang,Liaodou18 was chosen as the tested variety,and 3 water supply levels were included in terms of soil water content controlled at vegetative stage(V2-R1),flowering and podding stage(R1-R5)and pod filling stage(R5-R7),respectively.The negative effect of soil drought(W1)at different stages on soybean yield showed in the order:R5-R7>R1-R5>V2-R1.Drought stress(W1)decreased soybean yield mainly through reducing pod number per plant,and mild drought(W2)caused lower yield decreasing than drought(W1).Both root length ratio and root surface area ratio were primarily fine root(root diameter,d=0-1.0 mm),accounting for 90% and 60%,respectively.Soybean root volume ratio was mainly thick root(d>4.5mm),accounting for more than 48% of total root volume.When water controlled at R1-R5 and R5-R7, the length and surface area allocation ratio of fine root(d=0-1.0 mm)exceeded that of V2-R1.Soil drought reduced root length,root surface area and root volume allocation proportion of thick root(d>4.5 mm).The root biomass density increased with the advance of growthprocess,while drought stress reduced root biomass density.

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备注/Memo

基金项目：辽宁省科技攻关项目(2011201020)。

第一作者简介：闫春娟（1983-），女，硕士，助理研究员，研究方向为大豆育种及栽培。E-mail：yanchunjuan1983@163.com。
通讯作者：宋书宏（1964-），男，研究员，研究方向为大豆育种及栽培。E-mail：sshun@163.com。

更新日期/Last Update: 2013-02-20