ANALISIS PERTUMBUHAN DAN HASIL TANAMAN JABON (Anthocephallus cadamba)
Abstract: Anthocephallus
cadamba was a native species and one of some commercial trees which had a good
prospect to develop on the low production forest. This research was aimed to
analyze growth and yield of A. cadamba plantation, including the living trees
percentage, productivity, economic cutting cycle, and its profit. Parameter of
data analysis used trees diameter, high and volume, mean annual increment,
polynomial equation modelling and financial analysis i.e. net present value
(NPV), and benefit cost ratio (BCR). The research had been conducted at
research plots of A. cadamba in sub District of Mandau Talawang, Central
Kalimantan Province since 1998 to 2010. Soil type in the site was ultisol
former shifting cultivation and scrubs. The result of this research showed that
living trees precentage at 12 years old was 57.7 %. Mean annual increment and
its density were 19.05 m3 ha-1 and 641 tree ha-1 respectively. Equation
modelling of jabon plantation was y = 4.7814 + 3.6028x - 0.185x2 (R2= 63.34 %).
In the bank rate of 9 % year-1, the economic cutting cycle of this plantation
was 13 years with net present value was IDR 72,79 million per ha. If the bank
rate of 6 % and 12 % per year, then net present value at the 13 years were IDR
108.52 and IDR 48.56 million ha-1 respectively. The A. cadamba was suitable to
timber estate and to increase the productivity of former shifting cultivation,
scrub, and low potential forest areas.
Penulis: Wahyudi
Kode Jurnal: jpkehutanandd120066