小麦茎秆抗倒性的数学模型研究

利用多元统计分析和微分方程建立了小麦发育后期茎秆抗倒伏的数学模型.首先,对实验所得的数据进行了预处理,建立了倒伏指数的相关模型,并在给定穗重的条件下,模拟出理想的株型结构;然后,对小麦茎秆进行受力分析,建立小麦倒伏临界力的微分方程,算出腊熟期各品种小麦的抗倒伏风速;最后,对所建模型以及相关问题和结果进行总结分析,并结合实际提出小麦育种的一些建议.

The Analysis on Lodging Resistance of High-quailty Wheat

Recently,high-quality wheat is one of crucial topics in the modern agriculture, and the harvest of high-quality wheat mainly results from lodging problem.To investigate the lodging of high-quaility wheat,this paper introduces three different mathematical models concerning the index of lodging resistence,and analyzes key factors on this index by correlation analysis and path analysis.To better design the structure of several typical wheats in 2008,particle swarm optimization is used to address this hard problem.Finally,we analyze and discuss the threshold loading of the wheat as well as the threshold wind speed.