【摘要】 为了给小麦节水高产栽培中土壤水分管理提供依据,采用池栽遮雨的方法,用Logistic曲线拟合不同水分调控条件下籽粒的灌浆过程,研究灌浆参数的差异。结果表明,水分调控对籽粒灌浆参数有不同程度的影响。从灌浆持续时间看,Tmax、T1较稳定,T2变异系数大、T3最不稳定;从灌浆速率看,R较稳定,Rmax、R1、R2变异系数大,R3最不稳定。相比而言,拔节期灌水1次和拔节期+孕穗期灌水2次对阶段灌浆参数影响较大。强势粒与弱势粒之间灌浆参数差异不明显,表现为强弱势籽粒灌浆趋于同步,强势粒灌浆速率略快于弱势粒。因此在河南高产栽培条件下,提高缓增期灌浆速率(R3),相对延长缓增期持续天数(T3),促进落黄,对提高粒重有利。更多还原

【Abstract】 The process of grouting controlled by water is conformed by Logistic curve and the difference of grouting parameter is analyzed in wheat grown in water-proof shelf.The result showed that water controlling brings different effect on grouting parameter.At the aspect of the length of grouting,T_max and T₁ are more stable than T₂ and T₃;At the aspect of the velocity,R is the most stable,next is R_max,R₁,R₂;There are obvious effects on grouting parameter when watering once at internode elongation stage or internode elongation stage and booting stage twice;the divergence of strong and weak seed is not distinct in the grouting parameter,strong seed is better than weak seed.Under the circumstances of high-yield planting at Henan,increasing slow-growth stage of grouting（R₃）,and enlonging duration of slow-growth stage（T₃）relatively,boosting yellow ripening,is advantaged to increase grain-weight.更多还原