Pertumbuhan dan Serapan Karbon Tanaman Silvikultur Intensif Shorea leprosula Pola Rumpang (Kasus di PT Sarpatim, Kalimantan Tengah)

Abstract

Penerapan silvikultur intensif (SILIN) pola rumpang memiliki potensi untuk mempercepat produktivitas dan meningkatkan penyerapan karbon hutan alam. Praktik SILIN dapat berkontribusi untuk memitigasi perubahan iklim melalui mekanisme perdagangan karbon. Penelitian bertujuan menganalisis pertumbuhan dan kemampuan serapan karbon tanaman SILIN Shorea leprosula pola rumpang. Tanaman SILIN pada berbagai umur dan kemiringan lapangan diukur sebanyak 30 plot contoh. Riap rata-rata diameter dan tinggi tanaman S. leprosula hingga umur 10 tahun masing-masing sebesar 1,92 cm/tahun dan 1,49 m/tahun, dan persen hidup tanaman mencapai 72%. Kemiringan lapangan tidak memengaruhi pertumbuhan diameter dan tinggi tanaman. Cadangan karbon SILIN pola rumpang hingga umur 10 tahun diperoleh sebesar 20,75 ton C/ha dengan laju serapan karbon sebesar 8,61 ton CO2/ha/tahun. Hubungan antara umur tanaman (A, tahun) dan serapan karbon (CO2stok, ton CO2/ha) digambarkan melalui persamaan CO2stok= e^(6,24339-16,8028(1/A)) (Lack of Fit = 0,665; s = 11,10). Tegakan alam yang terdapat didalam rumpang memiliki cadangan karbon sebesar 62,62 tonC/ha.

The application of intensive silviculture (SILIN) in the gap pattern has the potential to accelerate productivity and increase carbon sequestration in natural forests. The SILIN practice can contribute to mitigating climate change through carbon trading mechanisms. The research aims to analyze the growth and carbon sequestration capacity of SILIN Shorea leprosula plants in a gap pattern. SILIN plants at various ages and slopes were measured in 30 sample plots. The average diameter and height growth rates of S. leprosula plants up to 10 years old were 1,92 cm/year and 1,49 m/year, respectively with a plant survival rate of 72%. The slope doesn’t affect the growth of plant diameter and height. The carbon stock of SILIN in the gap pattern up to 10 years old was found to be 20,75 tons C/ha, with a carbon sequestration of 8,61 tons CO2/ha/year. The relationship between plant age (A, years) and carbon sequestration (CO2stok, tons CO2/ha) are described by the equation CO2_stok= e^(6,24339-16,8028(1/A)) (Lack of Fit = 0,665; s = 11,10). Natural stands within the gaps have a carbon stock of 62,62 tons C/ha.