土壤水分调控对冬小麦籽粒灌浆特性的影响.pdf

　2006, 26(5):122～ 125 Journal of Triticeae Crops 土壤水分调控对冬小麦籽粒灌浆特性的影响 1 2 1 1 1 张　凯 ,任　健 ,仝胜利, 陈利军, 董丽平 (1. , 464000;　2. , 464000) 　: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 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 、T 1 较稳定, T2 变异系数大、T 3 最不稳定;从灌浆速率看, R 较稳定, R max 、R 1 、R 2 变异系数大,R 3 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(R ), 相对延长缓增期持续天数(T ), 促 3 3 进落黄, 对提高粒重有利。 　　:冬小麦;水分调控;籽粒灌浆 　　:S512. 1;S318　　　　:A 　　　　:100-1041(2006)05-012-2 04 Study on the adjustment of Grouting Characteristics of Winter Wheat Seed by Soil Water Controlling 1 2 1 1 1 ZHANG Kai , REN Jian , ONG Sheng-li ,CHEN L-i jun ,DONG L-i ping (1. Xinyang Agricultural College, Xinyang, Henan 464000, China;2. Xinyang Bureau of Ag riculture, Xinyang, Henan 464000, China) Abstract:The process of grouting controlled by w ater is conformed by Logistic curve and the differ- ence of grouting parameter is analyzed in w heat grow n in w ater-proof shelf. The result showed that w ater controlling brings different effect on grouting parameter. A t the aspect of the length of grou- ting, Tmax and T 1 are more stable than T2 and T3 ;At the aspect of the velocity, R is the most stable, next is R max ,R 1,R 2 ;There are obvious effects on grouting parameter w hen w atering 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 w eak seed. Under the circumstances of high-y