The characteristics of Pinus mercusii resin productivity flow pattern

Pinus merkusii Jungh et de Vriese belongs to the pine species that grows naturally in Indonesia, particularly in Sumatra: Aceh, Tapanuli and Kerinci. The Perhutani has managed and developed P merkusii as a source for the state revenue. Wood and resin are the most important products of the P merkusii tree.The purpose of this study was to understand the effect of the tree growth based on its resin productivity and its characteristic flow pattern per unit time to support the completion of the project. This study was conducted at KPH Banyumas Barat in March-October 2018. The height and periphery of the trees were the data parameters for the growth evaluation. The resin productivity was evaluated for a year based on the characteristic flow pattern approach by using the drill tapping method on 201 sample trees which was repeated weekly. According to the statistical analysis, the tree's periphery has a positive effect on the resin productivity whereas the height has a negative one, which means that the cultivation of the pine tree is highly affected by the selected sylviculture. The research showed, by conducting a systematic measurement of the resin productivity of the 201 chosen trees reveals the existence of a good characteristic of resin pattern productivity in 10 individuals trees. The characteristic of resin productivity output pattern sequentially increased with a peak in May-August. This characteristic data is very useful for the Perhutani to optimize the cultivation of the entire P merkusii class for future endeavors.