%0 Journal Article
%T Effects of early growth stage shading on rice flag leaf physiological characters and grain growth at grain-filling stage<br>生育前期遮光对水稻灌浆期剑叶生理特性及籽粒生长的影响
%A LIU Qi-hua
%A ZHOU Xue-biao
%A YANG Lian-qun
%A LI Tian
%A ZHANG Jian-jun
%A <br>刘奇华
%A 周学标
%A 杨连群
%A 李天
%A 张建军
%J 应用生态学报
%D 2009
%I 
%X In a pot experiment, rice plants were shaded during the period from transplanting to booting, aimed to study the effects of early growth stage shading on the rice growth at grain-filing stage.Comparing with the control, early growth stage shading decreased the tiller numbe by 26.72%.but increased the flag leaf area and soluble sugar content by 33.86% and 30.23%,respectively.The filled-grain number per panicle,1000-grain mass, ultimate brown rice mass, and maximum and average grain-filling rates decreased by 8.65%,4.81%,9.74%,20.22%,and 19.13%,and the effective panicle number and grain yield declined by 25.26%and 39.56%,respectively.The peak time of grain-filling rate (T_m) advanced 1.66 days, while the grain-filling time (T_(99))prolonged 6.80 days. For shading-tolerance variety, its flag leaf Chla, Chlb,and Chl(a+b)contents at early and mid grain-filling stages,and the protein N and soluble sugar contents and Chl a/b in its flag leaves at grain-filling stage all increased under early growth stage shading,and the ultimate brown rice mass and 1000-grain mass maintained at the similar levels as the control. Consequently.its grain yield reduction rate was lower than that of shading-sensitive variety.
%K early growth stage shading
%K rice
%K flag leaf
%K physiological characters
%K grain growth
%K grain yield<br>前期遮光
%K 水稻
%K 剑叶
%K 生理特性
%K 籽粒生长
%K 籽粒产量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=D7EA9D3BD28E99BF64DDD34C958C0CD3&yid=DE12191FBD62783C&vid=A04140E723CB732E&iid=9CF7A0430CBB2DFD&sid=F3160F9CC1D4A520&eid=7B9C09EE391A7996&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=0&reference_num=0