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杂草种子空间扩散模型的建立 被引量:3

THE ESTABLISHMENT OF SPATIAL MODELS FOR WEED SEED DISPERSAL
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摘要  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 make optimal strategies for weed control by simulation and model analysis, we designed and did an indoor experiment of weed seed dispersal by wind. Based on the experimental data, in this paper, spatial model of weed seed dispersal has been built. The results show: dispersal of weed seed in any direction obeys an approximate Gaussian distribution; under the experimental conditions, spatial distribution type of weed seed dispersal will change with variation of wind speed. Well-known Howard et al....
出处 《贵州科学》 2004年第2期1-4,共4页 Guizhou Science
基金 国家自然科学基金(编号:30060024) 国家民委生态系统模型及应用开放重点实验室开放基金 荷兰瓦赫宁根大学基金(编号:PE&RCiv003) 中国-丹麦合作项目(1998)
关键词 概率分布 杂草种群 扩散模型 probabilistic distribution weed population dispersal model
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参考文献7

  • 1[1]KropffMJ, et al. Modling crop- weed interactions. CABIntemational,[M]Wallingford UK and IRRI Los Banos Philippines. 1993
  • 2[2]Cousens R. Mortimer, M. Dynamics of weed populations [M]. Cambridge University Press. 1995
  • 3[3]David C B, Wu, H, Sharpe P J H, Chandler J M. Modeling distributions of crop and weed seed germination time [J]. Weed Science, 1989.37:724 - 729
  • 4[5]Howard C L, et al., The dispersal of weeds: seed movement in arable agriculture[M]. Proceedings of Brighton Crop Protection Conference,Weeds. pp. 1991, 821 - 828
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