Study On Structure Of Secondary Forest In Jingou Ling Farm

The paper studies on Pobulus davidiana Dode secondary forest and Betula platyphylla Suk. secondary forest in Jingou Ling farm, Wangqing Forestry Bureau in Jilin province. It analyses spatial structure characteristic of secondary forest and bring forward corresponding restructured goals and methods. This study will improve condition of the structure, provide theory foundation for management of secondary forest in research area, accelerate positive direction succession of ecosystem, renew stepwisely and come into being the well-liking and steady ecosystem.This paper applies mostly three parameter of spatial structure to analyze level structure of secondary forest, gain the structure characteristic of different ages, multilayer, mixture forest. And it adopt CCH(Crow light Competition Height method) and dividing arrangement of arbor, shrub and herbage to study the vertical structure characteristic of secondary forest. In base of special compose, diameter structure, level structure and vertical structure, it put forward the goals and methods of adjusting structure. It offer theory foundation for taking reasonable management measure in secondary forest, guide activity of manage and practice in Pobulus davidiana Dode secondary forest and Betula platyphylla Suk. secondary forest. Consequently it will improve the structure of Pobulus davidiana Dode secondary forest and Betula platyphylla Suk. secondary forest, advance its level of working and benefit of integer.