Growth and yield model for non-timber forest product of kemenyan (Styrax sumatrana J.J. Sm) in Tapanuli, North Sumatra

International Conference on Agriculture, Environment, and Food Security

农业科学;生态环境科学

Aswandi^1 ; Kholibrina, C.R.^1

Forestry and Environment Research Development, Institute of Aek Nauli, Kampus Kehutanan Aek Nauli, Jl Raya Parapat Km 10.5, Sibaganding, Parapat Simalungun North Sumatra

21174, Indonesia^1

关键词: Catchment area;    Current annual increments;    Diameter growth;    Growth and yield;    Growth and yield models;    Measurement data;    Non-timber forest products;    Optimal growth;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/122/1/012036/pdf
DOI  :  10.1088/1755-1315/122/1/012036

来源: IOP

【 摘 要 】

Kemenyan is Styrax tree resin, the main of non-timber forest product commodity in Lake Toba catchment area, North Sumatra since hundreds years ago. However, there are lack of information about the growth and yield prediction for this tree species. The objective of study is to construct the growth and yield models for Styrax sumatrana in Tapanuli region, North Sumatra. Measurement data from 20 temporary plots were used to formulate stand diameter and height equations, and to project the incense production. The highest Current Annual Increment (CAI) of diameter occurs in the stand's age 21 to 25 years (1.00 cm/year). The growth of diameter declines significantly to 0.48 cm/year in age 46 to 50 years, and decrease to 0.26 cm/year at age 50 years up. The intersection of CAI and MAI curves occur in stand age 31 to 35 years. It shows that the optimal growth occurs in this period. The average of incenses production was 318.59 g/tree/year. The optimum incense production was achieved when the diameter growth was maximal and tapping scars accumulation was limited.