Abstract
Indonesia has the largest peat area in the tropical zone, which estimated about 21 million ha, with a percentage of 70% of the peat area in Southeast Asia and 50% of the world's tropical peatlands. This study aims to evaluate the physical properties of soil in each layer of soil and land cover in inland peat swamp forests in LAHG in Central Kalimantan. The research used the profile method (minipit) measuring 120 cm x 120 cm. Each location is given 3 plots on 2 (two) land cover namely forest and burnt area. The research location is in LAHG. This research was conducted in July-December 2020. Samples were analyzed at the Banjarbaru Research and Development Laboratory. The parameters observed were bulk density, moisture content, fiber content, soil color, infiltration, and hydraulic conductivity. The research data were analyzed statistically by means of regression and correlation analysis. The results showed that the study of the physical properties of inland peat soil in the forest had bulk density ranging from 0.10 to 0.15 g / cm-3, moisture content 541.18-910.00%, fiber content 8-40%, infiltration -0 , 58-29.27 ml / hour, hydraulic conductivity 2.4-66.6 cm / hour with reddish black soil color. Whereas on burnt land, bulk density ranged from 0.10 to 0.15 g / cm-3, moisture content was 500.00-916.67%, fiber content was 12-52%, infiltration was -3.19-60.99 ml. / hr, hydraulic conductivity 2.4-30.6 cm / hr with dark black soil color. The study relationship pattern shows positive and negative.
Highlights
Indonesia has the largest peat area in the tropical zone, which estimated about 21 million ha, with a percentage of 70% of the peat area in Southeast Asia and 50% of the world's tropical peatlands
This study aims to evaluate the physical properties of soil in each layer of soil and land cover in inland peat swamp forests in Laboratorium Alam Hutan Gambut (LAHG) in Central Kalimantan
The results showed that the study of the physical properties of inland peat soil in the forest had bulk density ranging from 0.10 to 0.15 g / cm-3, moisture content 541.18-910.00%, fiber content 8-40%, infiltration -0, 58-29.27 ml / hour, hydraulic conductivity 2.4-66.6 cm / hour with reddish black soil color
Summary
Penelitian ini dilaksanakan pada Bulan Agustus 2020 sampai dengan Desember 2020. Lokasi pengambilan tanah gambut bertempat di Kawasan LAHG (Laboratorium Alam Hutan Gambut), Sebangau, Kalimantan Tengah (Gambar 1). Penelitian ini menggunakan metode profil minipit dengan ukuran 120 cm x120 cm. Minipit dibuat seperti penampang tanah (profil), tetapi ukuran lebih kecil dan lebih dangkal. Sampel tanah yang diambil di lapangan adalah sampel tanah tidak terganggu (Undisturb) dengan cara ring sampel pada sisi profil tanah gambut dan dipisahkan berdasarkan kedalaman 0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm, dengan ulangan sebanyak tiga (3) kali dan sampel tanah terganggu dengan mengunakan sekop kecil. Analisis tanah di laboratorium dilaksanakan untuk mengetahui nilai beberapa variabel yang digunakan dalam penelitian sifat fisik tanah gambut. Analisis tanah menggunakan metode seperti yang disajikan pada Tabel 1. Parameter sifat fisik gambut berupa bobot isi, konduktivitas hidrolik, warna tanah, kadar air, infiltrasi dan kadar serat untuk mengetahui pola hubungan serta keterkaitan antar parameter menggunakan metode regresi dan korelasi
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