不同冬小麦品种灌浆特性研究

研究结果表明 ,中麦 9号和 951- 2 0品种在植株性状、产量性状上明显优于东丰 170 1,是适合山西中部麦区高肥及中肥条件下种植的两个优良品种。 3个品种的生物产量及经济系数增长均与S型生长规律相拟合 ,可用Logistic方程Y =K/(1+ae-bx)来表达 ;其子粒重量的增加与茎、叶、鞘干重的变化有一定的消长关系 ,可用直线方程Y =a +bx或抛物线方程Y =a +bx +cx2 模拟。开花后天气条件的变化对麦田的物质积累、运转和分配有显著的影响 ,即使在良好的栽培管理和群体结构比较合理的情况下也可导致粒重在年际间的差异 ,而灌浆盛期的持续高温是高产麦田产量不稳的主要影响因素

Study on the Filling Characteristics of Different Winter Wheat Varieties

Experiment results showed: wheat varieties Zhongmai 9 and 951-20 were obviously superior to Dongfeng 1701 in yield under the condition of high and mid-fertility soil in the middle part of Shanxi province. The increasing trends of biomass and economic coefficient of the three varieties could be simulated as Logistic equation( Y =K/(1+ae -b x ). The increase of grain weight and the change of stem, leaves and sheath weight could be simulated as Y = a+b x or Y =a+b x +c x 2. The climate conditions after bloom had significant effect on dry matter accumulation, transportation, and distribution. Sustained high temperature in the full filling stage was the main cause of decreasing wheat grain weight on high-productive fields even if good cultivation management and rational colony structures were existed.