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不同生育时期水分有限亏缺对冬小麦产量及其构成因素的影响
引用本文:王俊儒,李生秀.不同生育时期水分有限亏缺对冬小麦产量及其构成因素的影响[J].西北植物学报,2000,20(2):193-200.
作者姓名:王俊儒  李生秀
作者单位:1. 西北农林科技大学基础科学系,陕西杨陵,712100
2. 西北农林科技大学资源与环境科学系,陕西杨陵,712100
基金项目:国家自然科学基金重大项目!“水肥高效优化耦合模式”( 49890 3 3 0 )
摘    要:利用温室盆栽试验研究了施N与不施N(施肥)条件下不同生育阶段水分有限亏缺对冬小麦产量及其构成因素的影响。结果表明,在小麦苗期、拔节期、灌浆期进行水分亏缺胁迫处理。对其经济学产量,生物学产量,每盆有效穗数、每穗粒数、千粒重等影响达显著或极显著水平。苗期和灌浆期为水分亏缺不敏感期,拔节期为亏缺敏感期。在施底肥条件下拔节期水分亏缺使每穗粒数、千粒重显著减少,或低于对照水平。从补偿角度看,苗期是生物学产量

关 键 词:冬小麦  生育时期  水分有限亏缺  产量  构成因素
文章编号:1000-4025-(2000)02-0193-08
修稿时间:1999-10-28

Effect of water-limited deficit stress in different growth stages on winter wheat grain yields and their yield constituents
WANG Jun ru,LI Sheng xiu \j.Effect of water-limited deficit stress in different growth stages on winter wheat grain yields and their yield constituents[J].Acta Botanica Boreali-Occidentalia Sinica,2000,20(2):193-200.
Authors:WANG Jun ru  LI Sheng xiu \j
Abstract:Using pot experimert with or without N fertilizer supply,the effects of water limited deficit stress in different stages on wheat grain yields and their constituents were studied.The results showed that water limited deficit stress in seedling stage,jointing stage and filling stage significantly affected grain yield,biomass,the effective numbers of ears,the grain numbers of each ear and the 1000 grain weight.The seedling stage and filling stage were not so sensitive to water limit deficit stress,but the jointing stage was very sensitive to the stress.The grain numbers of each ear and the 1000 grain weight significantly decreased by water stress in jointing stage with N fertilizer supply before sowing.On the other hand,the seedling stage was water effective compensation period of biomass;the jointing stage was highly effective water compensations period of biomass and also the effective compensation period of grain yield.Affected by the water status in seedling stage and filling stage,water supply in jointing stage have different compensation effects to 3 yield kind of factors.With N fertilizer applicated before sowing,water supply in filling stage had no compensation effect to grain yield but lowered the 1000 grain weight.
Keywords:winter wheat  growth stages  water deficit stress  yield  yield constituents
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