Effect of land rehabilitation measures on soil organic carbon fractions in semi-arid environment

Autor: James Mumo Mutio, Syphyline Kebeney, Ruth Njoroge, Harrison Churu, Wilson Ng'etich, Denis Mugaa, Boniface Alkamoi, Fred Wamalwa
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Frontiers in Sustainable Food Systems, Vol 7 (2023)
Druh dokumentu: article
ISSN: 2571-581X
DOI: 10.3389/fsufs.2023.1095865
Popis: Soil erosion threatens the sustainable intensification of food systems among smallholder farmers in arid and semi-arid lands (ASALs). Intensifying adoption of soil mitigation and rehabilitation measures is thus needed urgently in these ASALs, but scaling up these measures depends on scientific evidence of their contributions to key components of sustainable intensification such as soil organic carbon. However, there is no information on how existing mitigation and rehabilitation measures influence soil carbon fractions and carbon management indices in ASALs. This study evaluated the influence of soil erosion mitigation and rehabilitation measures on soil carbon fractions and management indices in Arenic Lixisols of semi-arid environments in West Pokot County, Kenya. We evaluated different vegetation types (maize-beans intercrop and pastures) with and without two locally developed terrace designs for soil conservation (Fanya Juu and Fanya Chini). Combining terracing with annual cropping significantly increased total organic carbon (TOC). The highest TOC (13 g C kg−1) was recorded in pasturelands with terraces while degraded land with no intervention was found to have the lowest TOC (6.0 g C kg−1). Terraced farms with longer residence time (>4 years old) had significantly higher organic carbon than (
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