Soil physicochemical properties to evaluate soil degradation under different land use types in a high rainfall tropical region: A case study from South Sulawesi, Indonesia

1st International Conference on Food Security and Sustainable Agriculture in The Tropics

农业科学;经济学

Ahmad, A.^1 ; Lopulisa, C.^1 ; Imran, A.M.^2 ; Baja, S.^1

Department of Soil Science, Faculty of Agriculture, Hasanuddin University, Jalan Perintis Kemerdekaan KM. 10, Makassar

90245, Indonesia^1

Department of Geology, Faculty of Engineering, Hasanuddin University, Jalan Perintis Kemerdekaan KM. 10, Makassar

90245, Indonesia^2

关键词: Cation exchange capacities;    Different land use types;    Mean annual precipitation;    Physical and chemical properties;    Physicochemical properties of soils;    Soil characteristics;    Soil physico-chemical properties;    X ray diffractometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/157/1/012005/pdf
DOI  :  10.1088/1755-1315/157/1/012005

学科分类：农业科学（综合）

来源: IOP

【 摘 要 】

Intensive cropping in the tropical region always becomes one of important driving forces of soil degradation. The primary aim of this study is to analyze the states and the dynamics of soil physicochemical properties to evaluate soil degradation in the tropical region a high rainfall on agricultural areas in South Sulawesi. A number of soil characteristics were analyzed for physical and chemical properties, and clay minerals with X-ray diffractometer. The degree of soil degradation is determined using Wischmeier and Smith equation. This study reveals that mean annual precipitation in 1979-2016 ranged from 1853.15 to 2981.30 mm/year. For land used for paddy field, palm oil, cacao and coffee plantation, the texture dominated with silt loam-clay loam, cation exchange capacity was 18.63-26.32 cmol+kg-1, 0.98-2.91% of C-organic, 32-55% of base saturation, 0.1-3.5 cm h-1of permeability, soil clay minerals were montmorillonite-kaolinite-halloysite, and the index erodibility was 0.3-0.5. Land used for mixed plants and shrubs, the texture dominated with silt loam-sandy clay loam, cation exchange capacity was 18.63-27.12 cmol+kg-1, 1.09-2.89% of C-organic, 32-55% of base saturation, 0.2-4.9 cm/h of permeability, soil clay minerals were kaolinite-halloysite, and index erodibility was 0.1-0.3. Land use for cultivated in the high intensity of rainfall has changed the physicochemical properties of soils, but cultivated in monoculture has at some degree increased soil erodibility.