国立屏东科技大学森林系硕士班专题讨论报告台湾北中部海岸保安林.PDF

立 林 論 北 林 The Assessment Methods of Health Indicators for Coastal Protection Forest in Northern and Central Taiwan 葉龍 劉玲 年 北 林 45 0.02 ha 2004 年4 8林數 北 林 立 數 狀類5 林 1.力2. 3.4. 5. 力 5異 92 % 力 林林 數 率 88 % 林狀 數數 率 92 % 數 數 率 92 % 數 良 力不 北 林 林狀行林 理 錄 13 33 1. 2. 3.度 0.4~20 mm 4. 22 栗 30 年5.度 7 度 更 林 狀狀 林 I Abstract The study involves the investigation of coastal protection forest in Northern and Central Taiwan, to work out 45 plots, and each plot area is 0.02 ha, and measurement of those variables related to tree health from April of 2004 to August. Factor analysis is applied to construct coastal protection forest in Northern and Central Taiwan health indicators in order to make the classification of tree health easier, and discriminate analysis functions are also constructed to predict tree health conditions. After the application of factor analysis those health-related variables have been classified into five factors: 1. branch vigor indicator, 2.bark damage indicator, 3.branch insect eat indicator, 4.root damage indicator, 5.crown vigor indicator. The above five factors can explain 92 % of the communalities for total variance which are with high explication ,and then they are used to classify tree health. The result of stand discriminate analysis shows that the hit rate is 88 % and it represents that the indicators produced by factor analysis are useful in complementing tree health classification. The hit