Analisis biomassa dan cadangan karbon tanaman bambu belangke (Gigantochloa pruriens) 82 © 2012 Program Studi Ilmu Lingkungan PPS Universitas Riau Suprihatno, B., Hamidy, R., Amin, B 2012:6 (1) ANALISIS BIOMASSA DAN CADANGAN KARBON TANAMAN BAMBU BELANGKE (Gigantochloa pruriens) Bambang Suprihatno Alumni Pascasarjana Ilmu Lingkungan Program Pascasarjana Universitas Riau, Pekanbaru, Jl. Pattimura No.09.Gobah, 28131. Telp 0761-23742 Rasoel Hamidy Dosen Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Riau, Kampus Bina Widiya Km 12,5 Simpang Baru, Pekanbaru, 28293 Bintal Amin Dosen Pascasarjana Ilmu Lingkungan Program Pascasarjana Universitas Riau, Pekanbaru, Jl. Pattimura No.09.Gobah, 28131. Telp 0761-23742 Analysis of biomass and carbon stock of belangke bamboo plants (Gigantochloa pruriens) ABSTRACT The research was conducted from November 2011 to January 2012 in the mineral soil of Kebun Kayangan, PT Salim Ivomas Pratama to estimate the potential of carbon stock of the bamboo and to quantify the amount of carbon that can be absorbed by bamboo plants. The results of the research showed that carbon content of culm biomass from 50.68 to 54.87% (mean of 53.84%), leaf from 47.68 to 53.76% (mean of 51.47%) and twigs/branches from 51,97 to 52,86 % (mean of 52.48%). The average of carbon content of the bamboo plant biomass was 52.60%. Biomass obtained from the bamboo plants with different heights were 145.07 g (1 m height), 461.33 g (3 m height), 834.79 g (5 m height), 999.24 g (7 m height), 781.14 g (9 m height), 958.31 g (11 m height) and 1,925.67 g (12 m height). The average of the bamboo biomass was 872.22 g/individual. The potential of the bamboo biomass from 23.47 to 29.82 t ha -1 with a mean of 26.30 t ha -1 . Carbon stocks obtained from the bamboo plants with different heights were 78.07 g C (1 m height), 248.04 g C (3 m height), 448.64 g C (5 m height), 541.68 g C (7 m height), 425.72 g C (9 m height), 519.67 g C (11 m height), 1,029.79 g C (12 m height) and the average was 470.23 g C/individual. The potential of carbon stock of the bamboo ranged from 12.61 to 15.93 t C ha -1 with a mean of 14.08 t C ha - 1 . Total carbon stock in bamboo plantation were 52.55 t C ha -1 , which was itemized as follows : carbon stocks of bamboo 14.08 t C ha -1 , under storey 0.11 t C ha -1 , litter 2.83 t C ha -1 and soil 35.53 t C ha -1 . Allometric equations to estimate of biomass according to high of bamboo plant was Polynomial Y = - 520.31 + 684.62x – 113.76x 2 + 6.0227x 3 {Y = biomass (g) and x = plant height (m)}. Allometric equations to estimate carbon stock according to high of bamboo plant was Polynomial Y = - 274.64 + 362.45x – 59.81x 2 + 3.1594x 3 {Y = carbon stocks (g) and x = plant height (m)}. Keywords: Belangke bamboo, Gigantochloa pruriens, carbon stok, mineral soil. ISSN 1978-5283