Beberapa Macam Perlakuan Terhadap Penyadapan Agathis Spp. Untuk Meningkatkan Basil Getah

An investigation into tapping of Agathis spp. using several methods has been carried out in Malang Forest District, Unit II Perum Perhutani, East Java, in 1983. The methods are designed to increase resin yield per unit time by manipulating tapping time, duration and covers and orientation.The investigation reveals that:1. Average resin production of the Agathis spp. for one week to two weeks times using of black and white plastic covers are respectively 9,85 gram/tree and 9,61 gram/tree. Without plastic cover the yield is 7, 76 gram/tree, shightly lower then when they are covered.2. The application of black plastic cover at tapping his significantly increased the yield up to 26,9% and those covered with white plastic of 23,8"7o. In both cases the resin yield is significantly higher compared to result obtained when tapping was carried out without cover.3. Average resin yield at tapping face oriented to in east and west from one to two weeks are 7,48 gram/tree and 11,26 gram/tree, respectively.4. The tapping face oriented to the west increases the resin yield up to 50,5% compared with that oriented to the east.5. The average resin yield for one and two week are respectively 8,57 gram/tree and 9,95 gram/tree. Duration of tapping of the Agathis spp. for one and two week does not effect the production level. Therefore 2 week tappin~ is not recomended