中国农业科技导报2017，Vol.19Issue(8)：105-114,10.DOI:10.13304/j.nykjdb.2016.766
不同熟期玉米品种的籽粒灌浆特性及其与温度关系研究
Study on the Grain Filling Characteristics and Their Relationship with Temperature of Maize Hybrids Differing in Maturities
摘要
Abstract
Maize grain maturity was significantly correlated with the heat condition during silking to mature stage.Clarifying the grain filling characteristics of different maize hybrids and their relationship with the temperature of grain filling stage could provide theoretical basis for maize grain development regulation and maturity selection.Field experiments were conducted in Harbin in 2014 and 2015 with 9 maize hybrids to study the grain filling characteristics of different maturity maize hybrids,and the relationship with temperature.The results showed that the maximum grain filling rate(Gmax),grain weight at the time of maximum grain filling rate(Wmax) and average grain filling rate (Gmean) of middle-early maturity hybrids were the highest among the 3 maturity hybrids,while those of super-early maturing hybrids were the second.The active filling stage (P) and effective filling time (t3) increased with the extension of ripening period,and the increase was mainly in the period of late grain filling stage.The active filling stage(P) and effective filling time (t3) was significantly positive correlated with the effective accumulated temperature during middle stage of grain filling period,and significantly negative correlated with the daily average temperature during grain filling stage.The maximum and average grain filling rate were positively correlated with the effective accumulated temperature ≥ 10℃ during the early stage of grain filling period and daily average temperature during the filling period,which was significantly negative correlated with the effective accumulated temperature ≥ 10℃ during the middle stage of grain filling period and daily mean temperature during the early stage of grain filling period.In the ecological area with limited caloric resources,the average daily temperature during the late stage of grain filling period of the middle-late maturing hybrids was lower,which was not conducive to grain filling,leading to the grain weight of middle-late maturing hybrids was less than that of the middle-early and super-early maturing hybrids.The prolonged maturity was not conducive to grain weight increase under the condition with limited caloric resources.The middleearly maturing hybrids had obvious advantage in grain filling,and then could obtain higher yield.关键词
玉米/熟期/灌浆/温度Key words
maize/maturity/grain filling/temperature分类
农业科技引用本文复制引用
钱春荣,葛选良,王荣焕,赵久然,于洋,郝玉波,徐田军,姜宇博,宫秀杰,李梁..不同熟期玉米品种的籽粒灌浆特性及其与温度关系研究[J].中国农业科技导报,2017,19(8):105-114,10.基金项目
北京市农林科学院博士后科研基金项目 （）
北京市博士后科研活动经费项目(2015ZZ-67) （2015ZZ-67）
国家自然科学基金项目(31301279) （31301279）
公益性行业(农业)科研专项(201303125-7) （农业）
“十二五”国家科技支撑计划项目(2014BAD12B01-2)资助. （2014BAD12B01-2）
