0023-6152

AA00697606

6796258

To conduct the management practices of plantations and improve the capability of professional construction, about 30 ha of the 241.1 ha state–owned forest land situated at Alishan district 141 forest compartment provided by Chiayi Forest District Office in Taiwan was chosen as the planning scope of the forest management plan in this study. The contents covered mensuration, thinning, and ecological surveys. This study also took about 3 ha of the experimental forest area as the basis of the practical planning for “thinning, skidding, yarding and transportation”. The forest management plan included the management objectives, status quo analysis, activity assessment, planning scheme, benefit assessment, and budget estimation. The measurement works included a survey on the thinning area via the double sampling method and forest stand volume estimation. The results indicated that the sampling percent of the planned thinning area in the photo sample area was 53%, and that of the ground sample area was 26%. There were totally 339 trees in 16 sample areas according to the survey of forest stand density in the sample area; the volume formula was based on the estimation formula of the crown area and volume shown in aerial photos established through the check formula. The Pearson product-moment correlation coefficient was 0.64–0.81. There was some correlation among the volume, coverage area of aerial crown, and crown projection area on the ground. The planning of thinning operations in forest management cover thinning and budget estimation. The volume of the three thinning modes, i.e., low thinning plan area, block clearing cut plan area, and intermediate thinning plan area, totaled 775.34 m³, and the required budgets were NTD 3,394,185.