论文部分内容阅读
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。
In order to explore the construction method of reasonable population structure in winter wheat production, three field experiments were conducted to establish different winter wheat populations in 2009/2011 and 2012/2013 winter wheat growing season. The effects of dynamic characteristics of winter wheat population on yield were analyzed and the winter wheat population Method of parameter optimization design. The results showed that the formation of yield correlated with the maximum dry matter accumulation rate, the rapid growth of dry matter, and LAI dynamic parameters. The relationship model established reached a significant level (P <0.01) The model was further paired t-test with independent samples (P> 0.05). In winter wheat parameter design, the range of dry matter accumulation, LAI change and population growth characteristic parameters, yield and population The relationship constitutes a constraint condition; the method can quantitatively describe the optimal growth dynamic process of winter wheat population, and is flexible and convenient. The method can provide theoretical analysis means for the construction of reasonable group structure in crop production management.