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Information Journal Paper

Title

Projected Changes in Soil Organic Carbon Stocks over a 50-Year Period under Different Grazing Management Systems in Semi-Arid Grasslands of Kenya

Pages

  357-369

Abstract

 Rangeland cover approximately 85% of Kenya’ s land mass and is a major resource for livestock farming with a considerable potential to mitigate climate change, yet these lands are stressed differently by various management. Our study aimed at predicting the long-term changes in Soil Organic Carbon (SOC) in grazing lands of Kenya under different grazing management systems (rotational, continuous and ungrazed), for a 50-year period using RothC 26. 3. This research was conducted on a commercial grazing ranch which practices the two grazing management systems. Soil samples were collected at the depths of 0-10, 10-20 and 20-30 cm for the determination of soil organic carbon concentrations and bulk densities, results were later used for running the RothC model. The predicted results showed that the rate of SOC stock [t/ha] was higher under rotational grazing system in comparison to ungrazed and continual grazing system for the modelling period of 2015-2064. In the absence of grazing, the system was predicted to accumulate 19. 22 Mg C ha-1 of SOC at the rate of 0. 369 Mg C ha-1yr-1, whereas rotational grazing system was predicted to accumulate 30. 46 Mg C ha-1 at the rate of 0. 61 Mg C ha-1yr-1. The continual grazing management system resulted in the accrual of 18. 49 Mg C ha-1 at the rate of 0. 37 Mg C ha-1 yr-1 over 50 years. Thus, rotationally grazing management system have the potential of accumulating soil organic carbon in semi-arid grasslands.

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    APA: Copy

    Rotich, Hillary K., Onwonga, Richard N., Mbau, Judith S., & Koech, Oscar K.. (2020). Projected Changes in Soil Organic Carbon Stocks over a 50-Year Period under Different Grazing Management Systems in Semi-Arid Grasslands of Kenya. JOURNAL OF RANGELAND SCIENCE, 10(4 ), 357-369. SID. https://sid.ir/paper/779402/en

    Vancouver: Copy

    Rotich Hillary K., Onwonga Richard N., Mbau Judith S., Koech Oscar K.. Projected Changes in Soil Organic Carbon Stocks over a 50-Year Period under Different Grazing Management Systems in Semi-Arid Grasslands of Kenya. JOURNAL OF RANGELAND SCIENCE[Internet]. 2020;10(4 ):357-369. Available from: https://sid.ir/paper/779402/en

    IEEE: Copy

    Hillary K. Rotich, Richard N. Onwonga, Judith S. Mbau, and Oscar K. Koech, “Projected Changes in Soil Organic Carbon Stocks over a 50-Year Period under Different Grazing Management Systems in Semi-Arid Grasslands of Kenya,” JOURNAL OF RANGELAND SCIENCE, vol. 10, no. 4 , pp. 357–369, 2020, [Online]. Available: https://sid.ir/paper/779402/en

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