Struktur Biomassa Di Atas Dan Di Bawah Permukaan Tanah Tanaman Jati Dengan Modifikasi Pola Tanam

Until now, study on the ecological aspects of agroforestry, e.g. estimation of above and below ground biomass is rare, since foresters tend to be more interested in its technical and production aspects. This study was conducted to develop estimation of of above and below ground biomass by employing allometric equation. The object of the study is teak (Teclona grandis) plantation under specific agroforestry model i.e, management regime (MR) type II, where trees are planted similar to alley cropping system with cassava as cash crop for 17, 41, and 65 month old. A total number of 9 trees, three from each of the stands, were taken as sample trees. A destructive method for whole biomass and main-axis cutting (MAC) method for biomass stratification were apllied to all sample trees. Result shows that there were close relationships between stem diameter and stem biomass as well as branch and leaf biomass, allowing us to make biomass estimation from the measured stem diameter. The equations are : w,= 0.0138 (D012H)1-(45 [kg,cm2m] for stern biomasswit = 0.0000589 (D0.1)4-747 [kg,cm] for branch biomass and w1 = 0.00879 (D01)241\u27 [kg,cm] for leaf biomass and wh, = 0.0396. (D012H)°Y-6217[kg,cm2m] for root biomass. Under the MR III plantation, the 17, 41 and 65 month old stands producing an estimated above-ground biomass of 0.0459, 5.097 and 15.143 ton/ha and below ground biomass of 0.0501, 1.373 and 2.838 ton/ha, respeectively. Stand biomass is dominated by the woody organ and above ground parts, which drive the nutrient contribution to the ecosystem. Keywords: management regime, teak, above and below ground biomass, allometr