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。
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.
出处
《草地学报》
CAS
CSCD
北大核心
2010年第5期656-660,共5页
Acta Agrestia Sinica
基金
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
关键词
热带人工草地
BP神经网络
建模
Tropical cultured grassland
BP Neural Network
Modeling
