【摘要】 在大田条件下,探讨了不同降水年型不同水分处理条件下大穗型小麦品种籽粒灌浆及产量的变化。结果表明:通过用不同方程对籽粒生长动态进行拟合,Cubic方程最精确。2000～2001干旱年型W和Ws与两个灌浆持续期参数(Se、S)相关性显著,2001～2002丰雨年型W和Ws与3个灌浆速率参数(V、Vs、Vmax)间相关性达显著水平。两年度相比,2000～2001年度籽粒灌浆持续期短,灌浆速率小,导致粒重降低。灌水对灌浆参数的效应年际间存在差异,2000～2001年度随灌水次数增多,S和Se延长,灌浆速率降低;而2001～2002年度随灌水次数增多,S和Se缩短,灌浆速率以灌一水处理最小,灌两水处理最高。灌水对产量的影响,2000～2001年度显著增产,2001～2002年度处理间无显著差异,灌三水处理较灌两水处理反而减产。更多还原

【Abstract】 Under field conditions,changes of grain filling and yield of winter wheat with large-ear cultivar Yumai66 were studied in Zhengzhou experimental sit in Henan province during the 200~2002 growing seasons,there was different significantly between 2000~2001 and 2001~2002.The grain filling process of Yumai66,were modeled with Cubic,Quadratic and Logistic equation,R~2 values of modeled equations were significant,and the Cubic R~2 value was the significantest.There was a significant correlation between W and Ws,Se,S in dry year of 2000~2001,and between W and Ws,V,Vs,Vmax in rainy year of 2001~2002.In comparison with 2001~2002,grain filling duration was shortened,filling rate was smaller,which resulted in falling of grain weight in 2000~2001.Effects of irrigation on filling parameters were different between two year-styles,with irrigation improving,S and Se was lagged,filling rate reduced in 2000~2001,but S and Se was shortened,grain filling rate of irrigation treatment with one application was lowest,that of irrigation treatment with two applications was the highest in 2001~2002.Irrigation improved yield significantly in 2000~2001,but there was not significant different between treatments,even yield of irrigation treatment with three applications was lower than that of irrigation treatment with two applications in 2001~2002.更多还原