Studies on the Stand Structure and Growth of Natural Forest in Central Area of Taiwan

• Main Authors: Jong, Sheng-Shing, 鍾昇興
• Other Authors: Joou-Shian Lee
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/13392131232173438229

碩士 === 國立中興大學 === 森林學系 === 84 === The natural forest in TaHsueh-Shan and Yuanfeng Areas are the objects of this study.For the investigation of natural for- est in TaHsueh-Shan Area,it''s to simulate the diameter distrib- ution of stand and species separately by two-parament Weibull probability density function;to explore the relation of Weibull function paraments with ecological paraments and environmental factors by correlation and regression analysis and to analyze the discrepancy of growing stock for identical tree species am- ong different environmental factors by Mann-Whitney U-test ana- lysis.The results got from the exploring of growing relation on the natural forest of Yuanfeng Area by two time investigation are as follows: 1.Diameter distribution of stand and species is effectively si- mulated by two-paraments Weibull probability density function. 2.The Diversity index of study area is between 0.71 and 1.06 in the area, it presents opposite J-type distribution between p- lant species and mean individual. 3.For stand, altitudes is the obvious factoe to effect diameter distribution in all geographic factors and c-value and b-value of two-paraments Weibull probability function are decreased by increasing the altitudes gradients.The notable correlation of Weibull function paraments with stand characteristics and ecological paraments is established. 4.The correlations between Weibull function paraments and infl- uential factors of stand structure by regression analysis are: b=0.9823+0.9877D-0.0044V c=4.8699-0.0022A-0.0104D+0.0008V+9.3630Si-6.4670E-3.3369Sr 5.In the study of natural forest growing in Yuanfeng Area, it shows that the volumes increase 189.3167m /ha but plants decr- ease 17 in number by two time investigations on the period of 16 years.At the first investigation, the Species richness and Diversity index of ecological parament are higher but at the second investigation, the Evenness index is higher.