摘要
为了提炼辽宁春玉米苗期干旱胁迫影响的定量化评价指标,以‘丹玉39’为试验材料,采用盆栽称重控水法,对不同水平土壤含水量对春玉米苗期根叶生长的影响进行研究。结果表明:正常(75%)和偏湿(85%)水分条件下玉米具有较高的株高,茎粗和叶面积。干旱胁迫下,玉米生长发育受到抑制,株高降低、茎粗变细、根系和地上部的生物量降低,叶片光合面积减小,根冠比增大。但一定程度的干旱(55%)有利于根系下扎,增大根冠比。干旱胁迫对玉米的株高和根系的生长发育有较大的影响,地上生物量受干旱胁迫影响大于根系。
Maize species called as‘Danyu39’was selected in the pot experiment.The effects of soil water contents under 6 treatment of different water supply（soil water contents reach 35%,45%,55%,65%,75% and 85% of holard） on the growth of roots and leaves of spring maize were analyzed,in order to determine the quantitative assessment indices of water stress during seedling in Liaoning Province.The results indicated that：plant height,stem diameter and leaf area of spring maize were great under 75%and 85%of holard.The growth of spring maize was restrained under water stress（35%,45%,55%of holard） .For example,plant height,stem diameter,aboveground and belowground biomass and leaf area all decline,while root/shoot ratio increased.The proper drought（55%of holard） was favorable to the growth of roots,and root/shoot ratio could be increased.The effects of water stress on plant height and growth of roots of spring maize was significant,and its effect on aboveground biomass was larger than on belowground biomass.
出处
《中国农学通报》
CSCD
北大核心
2011年第30期21-26,共6页
Chinese Agricultural Science Bulletin
基金
中央级公益性科研院所基本科研业务费专项"春玉米干旱胁迫影响定量评价及业务系统研发"(SYKYYW200904)
2009年辽宁省气象局科研课题"辽宁省主要农业气象灾害风险评估研究"(200907)
关键词
辽宁省
玉米
水分胁迫
响应
Liaoning Province
maize
water stress
response
