三峡库区农林复合系统根系分布及分形研究  

Study on Root Distribution and Fractional Structure of Agro-forestry Systems in Three Gorges Reservoir Region

作　　者：黄闰泉[1] 涂光新[1] 李凤莲 

机构地区：[1]湖北省林业科学研究院,武汉430079 [2]湖北省武当山旅游经济特区林业局,十堰442714

出　　处：《湖北林业科技》2006年第4期1-4,共4页Hubei Forestry Science and Technology

基　　金：国家"九五"攻关项目"三峡库区多功能防护林营建技术研究与开发"(96-007-02-04)的部分内容。

摘　　要：通过对柑桔×小麦+金乔麦植物篱、柑桔×小麦+茶树植物篱、柑桔×小麦+银合欢植物篱等系统的组成植物材料不同径级根系垂直分布、水平分布和系统的根系分布及竞争,以及柑桔、银合欢的根片段分形研究表明:植物材料根系呈典型的Gauss曲线分布,少数呈Lorentz分布;柑桔×小麦+茶树植物篱复合系统根系存在着较强的竞争关系,与柑桔×小麦+金乔麦植物篱复合系统相比,小麦减产18.5%,柑桔单果平均重减小14.3%;柑桔和银合欢的大部分分形参数与林龄或Ln-1间存在着3/4的标度关系,分形研究将丰富农林复合系统的结构优化方法,提高科学性、可操作性、可预见性。By inspecting and anatyzing on verticat, horizontal distribution and competition of roots in Citrus intercropping wheat and planting Fagopyrum Mill as hedgerows, Citrus intercropping wheat and planting Camellia sinensis CLO. kuntze as hedgerows, Citrus intercropping wheat and planting Leucaena glauca as hedgerows etc agro-forestry systems, and fractional structure discipline of Citrus and Leucaena glauca, this research displays that root vertical and horizontal distribution curves obey typical Gauss curve and Lorentz curve; in comparison with Citrus intercropping wheat and planting Fagopyrum Mill as hedgerows, roots in agro-forestry system of Citrus intercropping wheat and planting Camellia sinensis CL O. kuntze as hedgerows have stronger competitive relation, reduction of output of wheat reaches 18. 5 percent, average weight of Citrus decreases 14.3 percent; some fractional parameters of Citrus and Leucaena glauca have relation with 3/4 square of age of forest or Ln-1. Studying on fractional branching principle will enrich optimizing methods on structure of agro--forestry systems, enhances its scientificness, maneuverability and foreseeable capacity.

关 键 词：三峡库区 农林复合系统 分形结构 

分 类 号：S718.5[农业科学—林学]