摘要
为了研究气象因素对旱地小麦品种灌浆特性的影响,试验采用2个旱地小麦品种晋麦91号和晋麦47号,在同一地区雨养农业条件下,连续种植2年。通过对灌浆期气象因素的观察记录,利用Logistic方程对2个品种灌浆特性及其参数进行分析,明确旱地小麦灌浆特性与气象因素的相关性,利用多元线性逐步回归分析找到影响旱地小麦灌浆特性的直接作用因子。结果表明：旱地小麦品种千粒重变化趋势呈前期缓、中期快、后期稳的S型灌浆曲线类型,灌浆期35-40 d,灌浆速率最大值出现在开花后17-20 d,日增长量最大值为2.4 g以上;旱地小麦灌浆期间影响籽粒灌浆的主要气象因素是温度指标,在旱作条件下,20 cm地温是旱地小麦灌浆粒重的主导因素。
In order to provide theory basis for high efficient cultivation techniques and study the meteorological factors on grain filling characteristic of the dry-land wheat ,it had the two wheat varieties ：Jinmai 91 and Jinmai 47,planted for two consecutive years under the natural rainfall in the same region.Through observation of the pustulation period and record meteorological factors ,logistic equation was used to study the grain filling traits, using the method correlation analysis and stepwise regression analysis. A clear correlation of the grain filling characteristic and the meteorological factors were found. The results showed that the wheat weight of a thousand seeds growth assumed the slow-quick-slow change tendency of the S-type during each phase.About 35-40 d filling stage,the grain filling rate maximum value appeared after blossoms 17-20 d and daily maximum growth was more than 2.4 g.During the grouting, grain-filling grain weight index was more sensitive to temperature. Through stepwise regression analysis, the highest surface temperature of 20 cm soil was the dominant factor.
出处
《北方农业学报》
2016年第6期67-72,共6页
Journal of Northern Agriculture
基金
国家"863"计划项目(2011AA100501)
山西省农科院育种工程项目(11yzgc054)
山西省农科院科技攻关项目(YGG1423)
关键词
小麦品种
灌浆特性
气象因素
千粒重
Wheat
Grain filling characteristic
Meteorological factor
Wheat weight of a thousand seeds
