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Journal : Jurnal Penelitian Hutan Tanaman

PENDUGAAN BIOMASSA DAN KANDUNGAN KARBON KAYU AFRIKA (Maesopsis emenii Engl.) DI KABUPATEN SUKABUMI, JAWA BARAT Ismayadi Samsoedin; Harmastini Sukiman; Marfuah Wardani; N. M. Heriyanto
Jurnal Penelitian Hutan Tanaman Vol 13, No 1 (2016): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1355.745 KB) | DOI: 10.20886/jpht.2016.13.1.73-81

Abstract

ABSTRACTMaesopsis emenii Engl. is one of the fast growing species that can grow on marginal soils with a high enough increment. This study aims to develop allometry equation and predict carbon content in every part of tree and forest stands of M. emenii at the age of eight years. Data was collected using a destructive sampling method through selection of sample trees, 10 out of 450 trees were selected that best represent the stand. Results showed that dry weight of the average oven plant organs are, consecutively stem sections 122.54 kg, 42.94 kg of roots, branches and twigs of 7.15 kg and 6.03 kg of leafs. Allometry equation between the above-ground dry weight of diameter is Y = 0,0363X (R ² = 0.96), logs with diameter of Y = 0,0347X (R ² = 0.95), root with diameter of Y = 0,0205X (R 2,5131 2,4926 2,3267 ² = 0.90) and between total dry weight with diameter of Y = 0,0559X (R ² = 0.97). Carbon content obtained at the 2,464 highest part of the trunk that is as much as 68,07%, respectively roots as much as 23,87%, branches and twigs of 3,97% and the leaves as much as 3,35%. Total carbon content in the stands at M. emenii 30.65 tonnes C per ha.Keyword: Biomass, carbon content and Maesopsis emenii ABSTRAKKayu afrika (Maesopsis emenii Engl.) merupakan salah satu tanaman tumbuh cepat yang dapat tumbuh pada tanah marjinal dengan riap yang cukup tinggi. Penelitian ini bertujuan untuk membuat persamaan alometri guna menduga kandungan karbon di setiap bagian pohon dan menduga potensi karbon pada tegakan kayu afrika umur 8 tahun dan menduga kandungan karbon pada tegakan hutan tanaman kayu afrika (M. emenii) umur 8 tahun. Pengumpulan data dilakukan dengan menggunakan metode destructive sampling melalui pemilihan pohon contoh, dari 450 pohon dipilih 10 pohon yang dapat mewakili tegakan tersebut. Hasil penelitian menunjukkan bahwa berat kering oven ratarata bagian kayu afrika berturut-turut adalah bagian batang 122,54 kg, akar 42,94 kg, cabang dan ranting 7,15 kg dan bagian daun 6,03 kg. Persamaan alometri antara berat kering bagian atas tanah kayu afrika dengan diameter ialah Y= 0,0363x (R² = 0,96), batang kayu afrika dengan diameter ialah Y = 0,0347x (R² = 0,95), akar kayu afrika 2,5131 2,4926 dengan diameter ialah Y = 0,0205x (R² = 0,90) dan antara berat kering total kayu afrika dengan diameter ialah Y 2,3267 = 0,0559x (R² = 0,97). Kandungan karbon kayu afrika paling tinggi diperoleh pada bagian batang sebanyak 2,464 68,07%, berturut-turut bagian akar sebanyak 23,87%, cabang dan ranting 3,97% dan bagian daun sebanyak 3,35%. Total kandungan karbon pada tegakan kayu afrika umur 8 tahun sebesar 30,65 ton C per ha. Kata kunci: Biomassa, kandungan karbon, Maesopsis emenii
KEANEKARAGAMAN HAYATI DAN ROSOT KARBON PADA RAWA-GAMBUT DI BUKIT BATU, KABUPATEN BENGKALIS, PROVINSI RIAU (Biodiversity and Carbon Sinks on Peat Swamps in Bukit Batu, Bengkalis Regency, Riau Province) N. M. Heriyanto; Dolly Priatna; Ismayadi Samsoedin
Jurnal Penelitian Hutan Tanaman Vol 17, No 1 (2020): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (962.628 KB) | DOI: 10.20886/jpht.2020.17.1.53-67

Abstract

                                                 ABSTRACTResearch on biodiversity and carbon sinks is still needed by the government to support policies in order to manage forests sustainably. The purpose of this study was to analyze the composition of species, stand structure, biomass and carbon sinks on peat-swamps in Bukit Batu, Bengkalis Regency, Riau Province. The research method was carried out with an inventory of vegetation to determine the potential of stands, rejuvenation, biomass and carbon sinks. Sample plots were taken randomly in the form of measuring plots of 100 m x 100 m in each condition of old secondary forest, young secondary forest and old scrub forest in the peat-swamp protection forest. The species commonly found and evenly spread in all conditions of the peat-swamp forest were Gymnacranthera paniculata, Shorea teysmanniana, and Shorea gibbosa. The structure of the third stand condition of the peatswamp forest was still like a peat-swamp natural forest with the structure of the curve was in the shape of an inverted letter “J.” The three conditions of the peat-swamp forests have high biomass and carbon deposits with the highest content of those that were found in the old secondary forests, and the lowest was in the old scrub forests. The condition of the old secondary  forests has the highest potential to absorb carbon dioxide in the air. The tree species that are potentially used as seed sources were S. teysmanniana, S. gibbosa and Diospyros maingayi.                                                   ABSTRAK                                                               Penelitian keanekaragaman hayati dan rosot karbon masih diperlukan pemerintah untuk mendukung kebijakan dalam rangka mengelola hutan secara berkelanjutan. Tujuan penelitian ini adalah untuk menganalisis komposisi jenis, struktur tegakan, biomassa dan rosot karbonnya pada rawa-gambut di Bukit Batu, Kabupaten Bengkalis, Provinsi Riau. Metode penelitian dilakukan dengan cara inventarisasi vegetasi guna mengetahui potensi tegakan, permudaan, biomassa dan rosot karbon. Sampel plot diambil secara acak berupa plot berukuran 100 m x 100 m di setiap kondisi hutan sekunder tua, hutan sekunder muda dan hutan belukar tua pada hutan lindung rawa-gambut. Jenis Gymnacranthera paniculata, Shorea teysmanniana dan Shorea gibbosa ditemukan tersebar merata di setiap kondisi hutan rawa-gambut. Struktur tegakan ketiga kondisi hutan rawa-gambut masih seperti hutan alam rawa-gambut dengan kurva struktur tegakan berbentuk huruf “J” terbalik. Ketiga kondisi hutan rawa-gambut tersebut memiliki biomassa dan simpanan karbon yang tinggi dengan biomassa dan simpanan karbon tertinggi ada di hutan sekunder tua dan terendah di hutan belukar tua. Kondisi hutan sekunder tua berpotensi untuk menyerap karbon dioksida di udara yang tertinggi. Pohon yang potensial dijadikan sumber benih adalah pohon S. teysmanniana, S. gibbosa, dan Diospyros maingayi.