毛竹林生态系统能流经济阈值模拟研究  

A STUDY ON THE SIMULATION OF ECONOMICAL THRESHOLD OF ENERGY FLOW IN PHYLLOSTACHYS PUBESCENS ECOSYSTEM

作　　者：何东进[1] 洪伟[1] 吴承祯[1] 蓝斌[2] 

机构地区：[1]福建农林大学林学院,南平353001 [2]鹭江大学,厦门361000

出　　处：《林业科学》2001年第z1期194-199,共6页Scientia Silvae Sinicae

基　　金：福建省自然科学基金资助项目 (C96 0 2 7)

摘　　要：Using the data obtained from sample plots of Phyllostachys pubescens, the dynamic model of energy flow of Phyllostachys pubescens ecosystem was built in this paper.Based on the model,the analysis of energy flow was combined organically with the methods of economical threshold, the concept of economical threshold of energy flow of Phyllostachys pubescen ecosystem (EET) was put forward,and the effect of compensation and super compensation were discussed furthermore.The results showed that the economical threshold of energy flow of Phyllostachys pubescens ecosystem were: EET leaf =0.3133· x 3,EET branch =0.2440· x 1 (where x 1 and x 3 represent energy of leave and branches respectively) ;the effect of compensation and super compensation existed in Phyllostachys pubescens, and the compensation point and super compensation point of Phyllostachys pubescens were 31.33%,13.61% (expressed in defoliation rate)and 24.40%,11.94% (expressed in branch cut rate)respectively.Therefor,this paper will not only enrich the study of energy ecology in the Phyllostachys pubescens ecosystem,but also provide a scientific basis for the management of Phyllostachys pubescens.Using the data obtained from sample plots of Phyllostachys pubescens, the dynamic model of energy flow of Phyllostachys pubescens ecosystem was built in this paper.Based on the model,the analysis of energy flow was combined organically with the methods of economical threshold, the concept of economical threshold of energy flow of Phyllostachys pubescen ecosystem (EET) was put forward,and the effect of compensation and super compensation were discussed furthermore.The results showed that the economical threshold of energy flow of Phyllostachys pubescens ecosystem were: EET leaf =0.3133· x 3,EET branch =0.2440· x 1 (where x 1 and x 3 represent energy of leave and branches respectively) ;the effect of compensation and super compensation existed in Phyllostachys pubescens, and the compensation point and super compensation point of Phyllostachys pubescens were 31.33%,13.61% (expressed in defoliation rate)and 24.40%,11.94% (expressed in branch cut rate)respectively.Therefor,this paper will not only enrich the study of energy ecology in the Phyllostachys pubescens ecosystem,but also provide a scientific basis for the management of Phyllostachys pubescens.

关 键 词：毛竹 生态系统 能流动态模型 经济阈值 补偿与超补偿 

分 类 号：S79[农业科学—林木遗传育种]