Greenhouse Gas Fluxes from Selected Soil Fertility Management Practices in Humic Nitisols of Upper Eastern Kenya

Abstract/Overview

We quantified the soil carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes of five soil fertility management practices (inorganic fertilizer (Mf), maize residue + inorganic fertilizer (RMf), maize residue + inorganic fertilizer + goat manure (RMfM), maize residue + tithonia diversifolia + goat manure (RTiM), and a control (CtC)) in Kenya’s central highlands using a static chamber method from March 2019 to March 2020. The cumulative annual soil CH4 uptake ranged from −1.07 to −0.64 kg CH4-C ha−1 yr−1, CO2 emissions from 4.59 to 9.01 Mg CO2-C ha−1 yr−1, and N2O fluxes from 104 to 279 g N2O-N ha−1 yr−1. The RTiM produced the highest CO2 emissions (9.01 Mg CO2-C ha−1 yr−1), carbon sequestration (3.99 Mg CO2-eq ha−1), yield-scaled N2O emissions (YSE) (0.043 g N2O-N kg−1 grain yield), the lowest net global warming potential (net GWP) (−14.7 Mg CO2-eq ha−1) and greenhouse gas intensities (GHGI) (−2.81 Kg CO2-eq kg−1 grain yield). We observed average maize grain yields of 7.98 Mg ha−1 yr−1 under RMfM treatment. Integrating inorganic fertilizer and maize residue retention resulted in low emissions, increased soil organic carbon sequestration, and high maize yields.

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APA

W.</div>, < (2024). Greenhouse Gas Fluxes from Selected Soil Fertility Management Practices in Humic Nitisols of Upper Eastern Kenya. Afribary. Retrieved from https://afribary.com/works/greenhouse-gas-fluxes-from-selected-soil-fertility-management-practices-in-humic-nitisols-of-upper-eastern-kenya

MLA 8th

W.</div>, <div>Githongo "Greenhouse Gas Fluxes from Selected Soil Fertility Management Practices in Humic Nitisols of Upper Eastern Kenya" Afribary. Afribary, 04 Jun. 2024, https://afribary.com/works/greenhouse-gas-fluxes-from-selected-soil-fertility-management-practices-in-humic-nitisols-of-upper-eastern-kenya. Accessed 25 Jul. 2024.

MLA7

W.</div>, <div>Githongo . "Greenhouse Gas Fluxes from Selected Soil Fertility Management Practices in Humic Nitisols of Upper Eastern Kenya". Afribary, Afribary, 04 Jun. 2024. Web. 25 Jul. 2024. < https://afribary.com/works/greenhouse-gas-fluxes-from-selected-soil-fertility-management-practices-in-humic-nitisols-of-upper-eastern-kenya >.

Chicago

W.</div>, <div>Githongo . "Greenhouse Gas Fluxes from Selected Soil Fertility Management Practices in Humic Nitisols of Upper Eastern Kenya" Afribary (2024). Accessed July 25, 2024. https://afribary.com/works/greenhouse-gas-fluxes-from-selected-soil-fertility-management-practices-in-humic-nitisols-of-upper-eastern-kenya