田间小麦叶面积空间分布数学模型的建立与应用

 对不同类型冬小麦品种叶形空间分布参数进行了定量描述,建立了叶片形状、叶面积指数随生长期的变化、叶面积随高度的分布及叶倾角分布(LAD)等叶形空间分布的模型及计算系统,提出了叶片形状因子和长势模型,单叶空间最高点、高度层间隔内累积水平投影叶面积及各组分的空间取向与叶倾角分布解析模型系统及其主要设计算法。上述模型为具有普适意义的冬小麦冠层结构机理模型,其计算系统可以精确计算任意高度层次的投影叶面积分布特性,是评价作物株形结构优劣、判断群体结构合理与否的有力工具,对解析和利用多角度遥感数据监测作物长势等也有重要参

Establishment and Application of Mathematical Model of Spatial Distribution of Wheat Leaf Area

The spatial distribution models and computing system of winter wheat including analytic models for winterwheat leaf shape and LAI development along with growth stages, winter wheat leaf area and LAD distribution along withheight were established by measuring and quantitive analysis of different structures of winter wheat varieties. The establishedmodels were as follows: the foliar shape factors simulation models, the spatial highest point model of single leaf, thecumulate projection leaf area models for the given height intervals, the spatial distribution models of leaf angle distribution.The main designing arithmetic of the system was also described in detail. These established models and computing systemcould be used for the precision calculation of the leaf area vertical distribution. It also could be used as the integratedevaluate indicators of the structure characteristics. It is good for analysis of the bi-directional remote sensing data formonitoring the crop growth vigour.