Push-pull technology improves carbon stocks in rainfed smallholder agriculture in Western Kenya

IF 2.8 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Carbon Management Pub Date : 2022-01-02 DOI:10.1080/17583004.2022.2035823

P. C. Ndayisaba, S. Kuyah, Charles A. O. Midega, Peter Njoroge Mwangi, Z. Khan

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引用次数: 6

Abstract

Abstract Push-pull technology improves agricultural productivity. However, its long-term effect on biomass carbon and soil organic carbon (SOC) is not yet known. The aims of this study were: to assess the effect of push-pull technology on (1) biomass carbon and (2) SOC, considering climatic conditions and the length of time that push-pull had been practiced on a farm; and (3) to establish the relationship between biomass carbon and SOC on farms. Aboveground biomass carbon and SOC were measured on 36 farms in western Kenya, encompassing three contrasting sites (Bondo, Siaya and Vihiga) and six cropping systems (push-pull and five non-push-pull systems). Farms in western Kenya stock between 3.0 ± 0.3 and 4.0 ± 0.4 t C ha−1 in crop biomass and between 24.4 ± 2.1 and 37.0 ± 2.6 t C ha−1 in the soil for those practicing push-pull, and between 1.1 ± 0.3 and 2.1 ± 0.2 t C ha−1 biomass carbon and between 19.2 ± 2.1 and 31.1 ± 1.7 t C ha−1 soil carbon for those without push-pull. There was no correlation between biomass carbon and SOC. Adoption of push-pull offers opportunities to mitigate climate change through carbon sequestration in plants and soils in low-, medium- and high-rainfall environments in both long and short rain seasons.

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推挽技术改善了肯尼亚西部雨养小农农业的碳储量

推拉技术提高了农业生产力。然而，它对生物量碳和土壤有机碳（SOC）的长期影响尚不清楚。本研究的目的是：评估推挽技术对（1）生物量碳和（2）SOC的影响，考虑到气候条件和农场实施推挽的时间长度；以及（3）建立农场生物量碳与SOC之间的关系。在肯尼亚西部的36个农场测量了地上生物量碳和SOC，包括三个对比点（Bondo、Siaya和Vihiga）和六个种植系统（推拉和五个非推拉系统）。肯尼亚西部农场库存在3.0之间 ± 0.3和4.0 ± 作物生物量为0.4 t C ha−1，介于24.4 ± 2.1和37.0 ± 对于那些练习推拉的人来说，土壤中有2.6 t C ha−1，在1.1之间 ± 0.3和2.1 ± 0.2 t C ha−1生物量碳和19.2之间 ± 2.1和31.1 ± 1.7 t C ha−1土壤碳，对于没有推拉的土壤。生物量碳和SOC之间没有相关性。推拉的采用为在长雨季和短雨季的低、中、高降雨量环境中通过植物和土壤的碳固存来缓解气候变化提供了机会。

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来源期刊

Carbon Management ENVIRONMENTAL SCIENCES-

CiteScore

5.80

自引率

3.20%

发文量

期刊介绍： Carbon Management is a scholarly peer-reviewed forum for insights from the diverse array of disciplines that enhance our understanding of carbon dioxide and other GHG interactions – from biology, ecology, chemistry and engineering to law, policy, economics and sociology. The core aim of Carbon Management is it to examine the options and mechanisms for mitigating the causes and impacts of climate change, which includes mechanisms for reducing emissions and enhancing the removal of GHGs from the atmosphere, as well as metrics used to measure performance of options and mechanisms resulting from international treaties, domestic policies, local regulations, environmental markets, technologies, industrial efforts and consumer choices. One key aim of the journal is to catalyse intellectual debate in an inclusive and scientific manner on the practical work of policy implementation related to the long-term effort of managing our global GHG emissions and impacts. Decisions made in the near future will have profound impacts on the global climate and biosphere. Carbon Management delivers research findings in an accessible format to inform decisions in the fields of research, education, management and environmental policy.