| 摘要: |
| 为探讨冬小麦生产中合理群体结构的构建方法, 在2009/2011和2012/2013年冬小麦生长季, 利用3个田间试验建立不同冬小麦群体, 分析冬小麦群体动态变化特征对产量的影响, 并提出冬小麦群体参数优化设计的方法。研究结果表明:产量的形成与干物质最大积累速率、干物质快速增长的延续点及叶面积指数(LAI)动态变化特征参数相关, 所建立的关系模型达到极显著水平(P<0.01), 对模型进一步用独立样本进行配对t检验, 模拟值与实际值差异不显著(P>0.05);冬小麦参数设计中, 不同时期的干物质积累、LAI变化和群体生长特征参数的范围以及产量与群体的关系构成约束条件;该方法能定量描述冬小麦群体最优的生长动态过程, 且灵活方便。本方法能为作物生产管理中合理群体结构的构建提供理论分析手段。 |
| 关键词: 冬小麦 群体参数 产量 设计方法 |
| DOI：10.11841/j.issn.1007-4333.2014.06.06 |
| 投稿时间：2014-02-26 |
| 基金项目:公益性行业科研专项(201203031);国家"973"计划项目(2009CB118602) |
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| Design method of optimizing winter wheat population character parameters |
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ZHAO Jiao, LIAO Shu-hua, WANG Pu
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| (College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China) |
| Abstract: |
| To study the method of building a reasonable population structure in winter wheat production, field experiments were designed to obtain different wheat populations in winter wheat growing seasons from 2009 to 2011, 2012 to 2013.The relationship between winter wheat yield and population dynamic change characteristics was analyzed, and design method of winter wheat population parameters was established.The grain yield of winter wheat was closely related to characteristic parameters such as dry matter maximum accumulation rate, inflection points in the curve for dry matter accumulation rate in grain filling stage and leaf area index (LAI) character parameters.Paired-sample t-test was used to validate the model established, and no significant difference was observed between the simulated and observed values.In the process of parameter design, the constraint conditions were constituted by the reasonable scope of dry matter accumulation and LAI in different growing periods, parameters range and yield formation model.The method is flexible and can quantitatively describe the dynamic process of population growth.It can provide a theoretical guidance for the population building in production management. |
| Key words: winter wheat population parameters yield design method |
