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- Title
不同熟期玉米品种的籽粒灌浆特性及其与温度关系研究.
- Authors
钱春荣; 王荣焕; 赵久然; 于 洋; 郝玉波; 徐田军; 姜宇博; 宫秀杰; 李 梁; 葛选良
- 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 middle-early maturing hybrids had obvious advantage in grain filling, and then could obtain higher yield.
- Subjects
HARBIN (China); FIELD research; TEMPERATURE; GRAIN
- Publication
Journal of Agricultural Science & Technology (1008-0864), 2017, Vol 19, Issue 8, p105
- ISSN
1008-0864
- Publication type
Article
- DOI
10.13304/j.nykjdb.2016.766