A density-dependent matrix model and its applications in optimizing harvest schemes  

作　　者：Guofan Shao, WANG Fei, DAI Limin, BAI Jianwei & LI Yingshan Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, USA Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China Inner Mongolia Agriculture University, Hohhot 010019, China Academy of Forest Inventory and Planning, State Forestry Administration, Beijing 100714, China 

出　　处：《Science China(Technological Sciences)》2006年第z1期108-117,共10页中国科学（技术科学英文版）

基　　金：jointly supported by China's Ministry of Science and Technology(Grant No.04EFN216600328);Jilin Yanbian Forestry Group,Liaoning Key Technologies R&D Program(Grant Nos.2004207002&2004201003);the National Natural Science Foundation of China(Grant Nos.30470302&70373044).

摘　　要：Based on temporal data collected from 36 re-measured plots, transition probabilities of trees from a diameter class to a higher class were analyzed for the broad-leaved-Korean pine forest in the Changbai Mountains. It was found that the transition probabilities were related not only to diameter size but also to the total basal area of trees with the diameter class. This paper demonstrates the development of a density-dependent matrix model, DM2, and a series of simulations with it for forest stands with different conditions under different harvest schemes. After validations with independent field data, this model proved a suitable tool for optimization analysis of harvest schemes on computers. The optimum harvest scheme(s) can be determined by referring to stand growth, total timbers harvested, and size diversity changes over time. Three user-friendly interfaces were built with a forest management decision support system FORESTAR?for easy operations of DM2 by forest managers. This paper also summarizes the advantages and disadvantages of DM2.

关 键 词：UNEVEN-AGED forestry  DIAMETER transition model  HARVESTING intensity  DIAMETER limit  sustainable forest management. 

分 类 号：S757.1[农业科学—森林经理学] S712[农业科学—林学]