| 不同品性冬小麦籽粒灌浆特性研究 |
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| 引用本文：信志红，郭建平，谭凯炎，张利华，刘凯文，杨荣光，张颖，孙义.不同品性冬小麦籽粒灌浆特性研究[J].气象与环境科学,2019,42(1):18-25.Xin Zhihong,Guo Jianping,Tan Kaiyan,Zhang Lihua，Liu Kaiwen，Yang Rongguang，Zhang Ying，Sun Yi.Study on Grain Filling Characteristics of Different Quality Winter Wheat[J].Meteorological and Environmental Sciences,2019,42(1):18-25. |
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| DOI：doi:10.16765/j.cnki.1673-7148.2019.01.003 |
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| 中文摘要:为揭示冬小麦干物质积累过程的动态变化，利用不同品种冬小麦分期播种的灌浆速率资料，建立了Logistic模型，定量分析了不同播期条件下不同品性冬小麦的灌浆特性，并探讨了冬小麦灌浆特性对气象因子的响应情况。结果表明，籽粒灌浆质量与开花后天数的关系符合Logistic生长曲线方程。基于Logistic模型求算的各次级参数能够较好地表征冬小麦籽粒灌浆特性，半冬性品种较春性品种灌浆高峰期出现时间早；春性品种的粒重渐增期和粒重快增期持续时间一般长于半冬性品种的；半冬性品种的平均活跃灌浆期较春性品种的短；早播和正常播种条件下，春性品种最大和平均灌浆速率均高于半冬性品种的，而迟播条件下春性品种最大和平均灌浆速率均低于半冬性品种的，适期晚播更利于春性品种灌浆和千粒重增加。灌浆特性的变异系数分布总体呈春性品种大于半冬性品种的，表明播期对春性品种的影响更大。不同籽粒灌浆特性对气象因子的响应不同，其中孕穗成熟期内的平均气温、孕穗乳熟期内的降水量、播种乳熟期内的日照时数与冬小麦灌浆特性相关密切，基于灌浆特性与气象因子建立的逐步回归方程决定系数为0.507～0.875，均通过了0.01的显著性检验。 |
| 中文关键词:Logistic模型 不同播期 冬小麦 灌浆特性 定量分析 |
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| Study on Grain Filling Characteristics of Different Quality Winter Wheat |
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| Abstract:In order to reveal the dynamic changes of winter wheat dry matter accumulation, using different varieties of winter wheat sowing grain filling rate data,a Logistic model was established to quantitatively analyze the grain filling characteristics of different varieties winter wheat under different sowing dates.The response of winter wheat grain filling characteristics to temperature was also discussed.The results showed that the relationship between grain filling quality and days after flowering accorded with Logistic growth curve equation.The secondary parameters based on Logistic model can better characterize the grain filling characteristics of winter wheat,semi winter varieties than the spring varieties filling peak appeared early,the duration of increasing grain weight and rapid increase in grain weight period of the spring varieties were generally longer than that of the semi winter varieties; the average active filling period was shorter of semi winter varieties than spring varieties.Under the conditions of early sowing and normal sowing,the maximum and average filling rate of spring varieties was higher than that of semi winter varieties, the maximum and average filling rate of semi winter varieties under late sowing conditions was higher than that of the spring varieties.Suitable late sowing is more conducive to grain filling and 1000 grain weight increase in spring varieties.The variation coefficient of grain filling characteristics showed that the spring varieties were more than the semi winter varieties,indicating that the sowing date had a greater impact on the spring varieties.Different grain filling characteristics have different responses to meteorological factors.The average temperature during the booting maturation period, the precipitation during the booting milk ripening period,and the sunshine duration during the sowing milk ripening period are closely related to the grain filling characteristics of winter wheat.The gradual regression equation established by the filling characteristics and meteorological factors has a coefficient of determination between 0.507 and 0.875,and both pass the significance test of 0.01 level. |
| Keywords:Logistic equation different sowing time winter wheat grain filling characteristics quantitative analysis |
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