ORIGINAL RESEARCH article
Front. Environ. Sci.
Sec. Soil Processes
Volume 13 - 2025 | doi: 10.3389/fenvs.2025.1572266
This article is part of the Research TopicRegenerative Agriculture for Soil Health, Greenhouse Gas Mitigation, and Climate ActionView all 6 articles
Local sediment and lime but no straw amendments can potentially improve barley biomass and yield at the field plot scale in Kenya
Provisionally accepted- 1Leibniz Center for Agricultural Landscape Research (ZALF), Müncheberg, Germany
- 2Department of Environmental Systems Sciences, ETH Zürich, Zurich, Zürich, Switzerland
- 3School of Agriculture and Biotechnology, University of Eldoret, Eldoret, Uasin Gishu, Kenya
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Soil acidification and nutrient leaching are major agricultural challenges in East Africa, leading to aluminum (Al) toxicity and poor crop yields. Various soil amendments are used worldwide to increase soil pH and crop production. Local sediment amendments have been identified as a potential soil improvement in Kenya, but the mechanisms remain unclear. This study examined the effects of liming, straw return, and local sediment amendments on nutrient availability and barley yield in Eldoret, Kenya. Plots were established with 1% and 3% of two local sediments (from Baringo and Nakuru) or with 0.15% lime, each with and without straw addition. Baringo 3% and lime treatments significantly reduced soil Al availability and increased soil pH, soil phosphorous (P) availability and barley yield (Baringo 3%: 1.3 t ha⁻¹, Lime: 0.91 t ha⁻¹), while the control had no yield. However, only Baringo 3% also increased soil silicon (Si) availability, achieving the highest yield. Other treatments and straw return had no significant impact on nutrient availability and plant production. These results indicate that the increase in barley yield with local sediment may be driven mainly by carbonate dissolution raising soil pH, while higher Si availability and accumulation could further enhance plant production. However, the beneficial effects are dependent on the sediment material and amendment rate.
Keywords: aluminum toxicity, Crop Production, Liming, plant performance, Silicon availability, yield
Received: 06 Feb 2025; Accepted: 28 May 2025.
Copyright: © 2025 Scherwietes, Six, Bawen and Schaller. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Eric Scherwietes, Leibniz Center for Agricultural Landscape Research (ZALF), Müncheberg, Germany
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