干旱地区农业研究Issue(1)：54-59,6.DOI:10.16302/j.cnki.1000-7601.2015.01.009
CO 2浓度升高对不同水分养分条件下小麦幼苗生长的影响
Effects of elevated CO2 concentration on the growth of wheat seedlings under different water potential and nutrition concentrations
摘要
Abstract
On the basis of hydroponic experiment ,this pot study included five nitrogen concentration levels (N0、N1、N2、N3、N4 ) ,three PEG concentration levels (P0、P1、P2 ) ,and two CO2 concentrations (370 ± 50 μmol·mol-1 ;700 ± 50 μmol·mol-1 ) .We studied the growth ,dry matter accumulation and distribution ,and water relation of wheat seedlings in different conditions .The results showed that plant height ,shoot dry weight ,root weight ,biomass ,and leaf water potential reached their maximums at N1P0 ,and so were the effects of elevated CO2 concentration .Maximal root length and root to shoot ratio appeared at N0 P0 and N1 P2 respectively .The biggest influence of elevated CO2 arose under the same condition .High CO2 concentration could mostly improve the growth of wheat seedlings at appropriate condition . At the same time ,elevated CO2 could improve leaf water potential of wheat seedlings ,which reduced the negative effects of PEG stress to some extent .Therefore ,elevated CO2 concentration would improve the growth of wheat and remit the negative effects of mild water stress ,whereas subtle effect might be observed if wheat growth was under severe drought .关键词
CO2浓度升高/氮素/水分胁迫/小麦幼苗/干物质积累Key words
elevated CO2 concentration/nitrogen/water stress/wheat seedling/dry matter accumulation分类
农业科技引用本文复制引用
司福艳,乔匀周,董宝娣,师长海,姜净卫,陈,郑鑫,刘孟雨..CO 2浓度升高对不同水分养分条件下小麦幼苗生长的影响[J].干旱地区农业研究,2015,(1):54-59,6.基金项目
国家科技支撑计划项目（2012BAD08B02，2013BAD05B02）；国家自然科学基金（31170415，31100191，30870411）；河北省自然科学基金（C2011503003，C2012503003）；河北省科技支撑项目 （）
