Simulasi Pengaturan Hasil Hutan Kayu Berdasarkan Jumlah Pohon pada Hutan Alam Produksi di Kalimantan Timur

Abstract

Yield regulation used in The Bussiness Plan (RKU) long term 10 years using a method based on the volume of timber and extensive acreage. Determination of annual allowable production based on volume and wide can describe the availability of the raw material wood round, but could not become the tool of control sustainable natural production forest because of the current forest conditions the high fells of the former forest. Therefore, the simulation of yield regulation based on the number of trees conducted to improve the methods and complete the aspects of yield regulation as long as it is used in every company of forestry. This research using the methods which is, group of types and trees diameter, calculation of the number of trees, simulation calculation of the stands are worthy of slash, classification of plots, and mapping the distribution of plots. Analysis of data was conducted on the calculation of the stand’s volume by using a formula that based on the research of Direktorat Jenderal Bina Program Kehutanan Edisi Khusus (DJBPKEK) No. 51 A tahun 1983 with the formula V = 0.0001234 D2,49130 for the Dipterocarpaceae and V = 0.0001450 D2,42950 for the non Dipterocarpaceae. Simulations was carried out with two approaches, with and without observe to access. Approach with regard to access is the yield regulation approach in the form of a grouping of the plots cutting which will be managed by considering access, while approach without regard to access is the yield regulation appoarch in the form of a grouping of the swath slash which will be managed by the assumption that all of the plots cutting can be accessed, so the company can manage all plots cutting. The result of research about yield regulation simulation based on the number of trees shows that the length of cutting rotation is 70 years, by the standing stock at least up to 50 cm, 25 tree/ha. Annual quota of production based on the number of trees in diameter 50 cm up as many as a year 15.843 tree with a volume of 40.467 m3/years, and the acreage of 800 ha a year.