Acta Agrestia Sinica

›› 2010, Vol. 18 ›› Issue (5): 656-660.DOI: 10.11733/j.issn.1007-0435.2010.05.008

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A Study on the Spatial Structure of the Simulated Biomass of Cultured Tropical Grassland

BAI Chang-jun, Yan Lin-ling   

  1. 1. Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan Province 575737, China;
    2. Ministry of Agriculture Key Laboratory for Utilization of Tropical Crops Germplasm Resources, Danzhou, Hainan Province 571737, China
  • Received:2009-11-03 Revised:2010-06-23 Online:2010-10-15 Published:2010-10-15

热带人工草地植被产量的时空结构建模研究

白昌军, 严琳玲   

  1. 1. 中国热带农业科学院作物品种资源研究所, 海南, 儋州, 571737;
    2. 农业部热带作物种质资源利用重点开放实验室, 海南, 儋州, 571737
  • 作者简介:白昌军(1967- ),男,甘肃民勤人,研究员,博士,主要从事热带牧草种质资源保存、鉴定评价、新品种选育等方面研究,E-mail:baichangjun2000@yahoo.com.cn
  • 基金资助:
    国家科技支撑计划项目(2008BADB3B08);物种资源保护项目;国家重点研究发展计划(973)项目(2007CB108903)资助

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Abstract: A study was conducted on the influence of grazing on the community structure of 4-year cultured quadrennial tropical grassland.By adopting Dual BP Neural Network,a modeling analysis on the spatial structure was made,while the grassland biomass of 15~175 cm during July,September,November and January was estimated based on the model.Results showed that the vegetation of cultured quadrennial tropical grassland distributed by layers in the vertical space.Forage production mostly concentrated in the layer of 11~60 cm.In particular,grassland biomass of 50cm layer had maximum production around October.

Key words: Tropical cultured grassland, BP Neural Network, Modeling

摘要： 在建成4年的热带人工草地上研究放牧与不放牧对热带栽培草地的影响,使用BP神经网络,对植被生物量时空结构进行建模分析,并对7,9,11,1月份在15~175 cm处的植被生物量进行预测。结果表明,栽培草地群落植被在垂直空间上层状分布,牧草产量多集中在11~60 cm草层,尤其是在10月份左右,50 cm处,植被生物量达到最大。

关键词: 热带人工草地, BP神经网络, 建模

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