Nilai Dugaan Serapan Karbon Dioksida Berdasarkan Plot Lingkaran dan Plot N-Jumlah Pohon di Areal Rehabilitasi ConocoPhilips Hutan Pendidikan Gunung Walat

Abstract

Kegiatan inventarisasi hutan tanaman untuk menduga serapan karbon dioksida umumnya menggunakan metode penarikan contoh dengan bentuk plot contoh berupa lingkaran dan plot n-jumlah pohon. Penelitian ini bertujuan menduga nilai cadangan karbon dan serapan karbon dioksida berdasarkan plot lingkaran (0,04 ha) dan plot n-jumlah pohon (6, 7, dan 8 pohon) serta membandingkan hasil pendugaan kedua bentuk plot contoh tersebut. Metode stratified systematic sampling with random start digunakan dalam pendugaan tersebut pada areal rehabilitasi ConocoPhillips di Hutan Pendidikan Gunung Walat dengan intensitas sampling sebesar 16% dan jarak antar plot sejauh 50 m. Sebanyak 40 plot contoh terpilih dan tersebar pada areal tanaman tahun 2009, 2010, 2011, dan 2014. Hasil penelitian menunjukkan bahwa nilai dugaan cadangan karbon dan serapan karbon sebesar 6,24 ton/ha dan 22,89 ton/ha. Nilai dugaan cadangan karbon dan serapan karbon berdasarkan plot lingkaran mempunyai ketelitian paling baik dibandingkan plot 6-jumlah pohon.

Plantation forest inventory activities to estimate carbon dioxide absorption generally use the sampling approach with sample plots in the form of circles and n-number of trees. This study aims to estimate the value of carbon stocks and carbon dioxide absorption based on circular plots (0,04 ha) and n-number of trees (6, 7, and 8 trees) and to compare the estimation result of the two sample plots. The stratified systematic sampling with random start was used in this estimation in the ConocoPhillips rehabilitation area in Gunung Walat Educational Forest with a sampling intensity of 16% and a distance between plots of 50 m. A total of 40 sample plots were selected and spread over the plantation areas in 2009, 2010, 2011, and 2014. The result showed that the estimated value of carbon stock and carbon sequestration were 6.24 tons/ha and 22.89 tons/ha. The estimated value of carbon stock and carbon sequestration based on the circular plot has the best accuracy compared to the 6-number of trees plot.