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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
The results showed that Zhongmai 9 and 951-2 were significantly superior to Dongfeng 170 1 in plant traits and yield traits, and were two fine varieties suitable for high-yielding and middle-yielding wheat planting in central Shanxi. The biomass and economic growth of the three cultivars were all fitted with the growth pattern of S-shape and expressed by Logistic equation Y = K / (1 + ae-bx). The increase of grain weight was related to stem, leaf and sheath dry weight There are some changes in the relationship between the decline can be used straight line equation Y = a + bx or parabolic equation Y = a + bx + cx2 simulation. The change of weather conditions after flowering had a significant impact on the accumulation, operation and distribution of material in wheat field, which could lead to the difference in grain weight between years even though good cultivation management and population structure were reasonable. However, The sustained high temperature is the main factor affecting the yield instability of high-yielding wheat fields