Hidayat, Andi (2024) PENGARUH SIFAT FISIKO-KIMIA DAN MINERAL LIAT TERHADAP SIMPANAN KARBON ORGANIK TANAH LAHAN PANTAI ACEH UTARA. S2 thesis, Universitas Malikussaleh.

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Abstract

The physicochemical properties and soil organic carbon stocks (SOCs) are crucial to enhancing soil and environmental quality. Coastal soils generally exhibit suboptimal physicochemical properties, while carbon storage in coastal soils is influenced by various factors, including clay minerals, though information on this is still limited. This study aims to identify the physicochemical properties and SOCs of coastal soils and their relationship with clay minerals. A total of 36 soil samples were collected from 9 soil profiles in 3 districts (Seunuddon, Lapang, and Dewantara). Three soil profiles in each district were based on their distance from the shoreline (300 m, 900 m, and 1500 m). Each soil profile consists of four layers with a thickness of 20 cm. The results show that the majority of the soils are sandy loam in texture with a low to medium bulk density (0.79–1.90 g/cm³). The organic carbon content is very low to low (0.03%– 1.60%) with a neutral pH, and the cation exchange capacity (CEC) ranges from very low to low (3.23–16.00 cmol+/kg). Clay minerals such as kaolinite, illite, and chlorite are categorized as moderate, with small amounts of quartz and very little vermiculite, goethite, and smectite. Labradorite was almost absent in all three locations. The topsoil layer in all locations has higher SOCs, which decreases with depth. Variations in SOCs based on distance from the coast are influenced by the physicochemical profile of the area. Vermiculite, labradorite, and smectite minerals positively contribute to SOCs; the higher the content of these minerals, the greater the SOCs. Soils with a high percentage of sand and silt tend to have low SOCs, while soils with higher clay fractions show greater amount of SOCs. Keywords: Bulk density, organic-c, soil aggregate, soil fraction, cation exchange capacity

Item Type:	Thesis (S2)
Subjects:	S Agriculture > S Agriculture (General)
Divisions:	Pascasarjana > 54111 - Magister Agroekoteknologi
Depositing User:	Andi Hidayat
Date Deposited:	27 Dec 2024 09:08
Last Modified:	27 Dec 2024 09:08
URI:	https://rama.unimal.ac.id/id/eprint/8926

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