华北农学报2011，Vol.26Issue(5)：186-191,6.
穗生长发育阶段不同水分亏缺对杂交稻产量形成的影响
The Effect of Different Water Deficit during Panicle Developmental Stage of Hybrid Rice on Grain Formation
摘要
Abstract
During panicle development stage of hybrid rice varieties, with experiment cultivated in pots and contrived simulation of water deficit,method to determine soil moisture by electronic balance and W. E. T Sensor, the effect of water treatments lasting different time and stress level on grain formation was studied. The results showed that both different time intervals and levels water deficit influenced panicle growth and development obviously, numbers of spikelets and filled grains, fertility rate and 1 000-grain weight all decreased, which leaded to the sharp reduction of panicle weight and grain yields. The decrease of spikelets numbers is one of the main reasons leading to yield reduction, secondary, the drop of fertility rate and grain weight. A positive correlation existed between yield drop range and water deficit degree, heavier water deficit had the greater influence than middle water deficit,and lower water deficit had certain influence, too. Water deficit during entire period of panicle growth and 10 -20 d after panicle initiation had the greatest influence,nextly,0 - 10 d after panicle initiation,20 - 30 d after panicle initiation had little influence on the panicle growth, but certain influence on grain filling. Influence degree of super hybrid rice,Guodao 6,was lower than that of normal hybrid rice,Shanyou 63 ,and its automatic adjustment a-bility of growth compensation and yield component factors after enduring moderate water deficit was stronger.关键词
杂交稻/水分亏缺/穗生长发育/产量性状Key words
Hybrid rice/ Water deficit/Panicle development/ Yield traits分类
农业科技引用本文复制引用
张卫星,朱德峰,朱智伟,林贤青,张玉屏,陈惠哲..穗生长发育阶段不同水分亏缺对杂交稻产量形成的影响[J].华北农学报,2011,26(5):186-191,6.基金项目
农业部重大科技专项(200701) （200701）
国家水稻产业技术体系建设专项(2009-2012) （2009-2012）
中央级公益性科研院所专项(CNRRI2009R G006-5) （CNRRI2009R G006-5）
