为通过模型分析和模拟来制定控制杂草的优化策略,我们设计并完成了一个杂草种子风扩散的室内实验。本文根据实验获得的数据建立了杂草种子扩散的空间模型。结果表明:杂草种子在任意方向上的扩散服从近似的高斯分布;在实验条件下,杂草种子扩散的空间分布型随风速的变化而变化。著名的Howard等〔5〕的杂草扩散模型是本文所建模型的特例。据此,我们推断Howard等〔5〕的模型所表示的分布型与一定高度的杂草种子在中等风速条件下扩散的分布型相似。 In order to formulate an optimization strategy for weed control through model analysis and simulation, we designed and completed a laboratory experiment on weed seed dispersion. In this paper, based on the experimental data obtained weed seed diffusion model. The results showed that the diffusion of weed seeds in any direction obeyed an approximate Gaussian distribution. Under the experimental conditions, the spatial distribution of weed seeds changed with the change of wind speed. The famous Howard et al. [5] weed diffusion model is a special case of this model. Accordingly, we infer that the distribution model of Howard et al. [5] model is similar to that of a certain height of weed seeds diffused at moderate wind speed.