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Assessment of land use management and its effect on soil quality and carbon stock in Ebonyi State, Southeast Nigeria.
Ota, Henry Obiahu; Mohan, K C; Udume, Bethel Uchenna; Olim, Denis Michael; Okolo, Chukwuebuka Christopher.
Afiliación
  • Ota HO; School of Science and Environmental Research Institute, University of Waikato, Private Bag 3105, Hamilton, New Zealand; Department of Soil Science and Environmental Management, Ebonyi State University, Abakaliki, Nigeria. Electronic address: ota.henryobiahu@waikato.ac.nz.
  • Mohan KC; School of Science and Environmental Research Institute, University of Waikato, Private Bag 3105, Hamilton, New Zealand.
  • Udume BU; Department of Fisheries and Aquatic Resources Management Michael Okpara University of Agriculture Umudike P. M. B. 7267, Umuahia, Abia State, Nigeria.
  • Olim DM; Department of Soil Science, University of Calabar, Nigeria.
  • Okolo CC; Department of Natural Resources Management, Jimma University, P. O. Box 378, Ethiopia.
J Environ Manage ; 358: 120889, 2024 May.
Article en En | MEDLINE | ID: mdl-38652993
ABSTRACT
Evaluating soil quality (SQ) resulting from land management use impact is important for soil carbon (C) monitoring, land sustainability and suitability. However, the data in less developed regions of Africa like Nigeria is scarce, limiting our understanding at global scale. The study evaluated land management use on soil quality in Ebonyi State, Nigeria, a representative region of Africa. Soil samples were collected in 2021 and resampled in 2022 from regions including five land use managements (FS = forest soil; GLS = grass land soil; ACS = alley cropping Soil; SDS = sewage dump-soils; CCS = continuously cultivated soil). Soil physical and chemical properties were analyzed and discussed. The results shows that soil physical properties (bulk density, hydraulic conductivity, aggregate stability) were significantly (P < 0.05) influenced by land use management. Moderate to high bulk density, very low hydraulic conductivity (HC), and low aggregate stability were observed across land management, suggesting potential inhibition to root penetration, poor aeration, and water infiltration. Improved land management practices such as planting of cover crops either for re-grassing or addition of crop residues could be adopted as conservative options for increasing soil quality and encourage additional soil C. Soil pH decreased with the increase in soil depth in all land uses for both years. A higher soil pH of 6.78 (slightly acidic) was seen in SDS and lower mean 6.0 (moderately acidic) was obtained in CCS at 0-20 cm in 2021. The average mean nitrogen content was rated "very high" (0.81 g kg-1 and 0.69 g kg-1) in 2021 and 2022 respectively, suggesting nitrogen might not be a limiting factor for plant growth in the region. During the 2021 and 2022 study periods, the overall average mean C stock were 12.71 g kg-1 and 15.87 g kg-1 respectively suggesting 3.1 g kg-1 C stock increment in 2022. Soil inorganic C also increased by 9.86 g cm-2 in 2022. The study provided crucial information about how land management use affected soil physico-chemical properties including C stock and suggested that C stock could be improved by adopting appropriate land management use practices. The results fill a data gap in under-studied regions, but also facilitate potential land management practices.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Suelo / Carbono País/Región como asunto: Africa Idioma: En Revista: J Environ Manage Año: 2024 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Suelo / Carbono País/Región como asunto: Africa Idioma: En Revista: J Environ Manage Año: 2024 Tipo del documento: Article