Comparison of the climate change mitigation potential between cashew agro-ecosystems and other land-uses in the dry semi-deciduous zone of Ghana

IF 2.2 3区 农林科学 Q2 AGRONOMY
Adu-Gyamfi Asamoah, Reginald T. Guuroh, Patrick Opoku, Eunice Okyere-Agyapong, Kwabena Afriyie-Agyekum, Seungdo Kim, Hanah Zoo, Lei Wang
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Abstract

In Ghana, cashew cultivation is rapidly expanding as a major land-use type. However, its contribution to climate change mitigation through carbon sequestration remains poorly quantified. Specifically, there is limited empirical data comparing the biomass carbon sequestration potential of cashew agro-ecosystems to other dominant land-uses such as cocoa plantations, shaded food-croplands, and natural forests within the same ecological zone. This study addresses that gap by assessing biomass carbon stocks (aboveground and belowground) of cashew trees of varying ages in comparison to cocoa trees, shade trees on food-croplands, and natural forests in Ghana’s dry semi-deciduous zone. The focus was exclusively on vegetation biomass carbon, excluding other carbon pools. Cashew and cocoa agro-ecosystems were grouped by age: below ten years and ten years and older. For each land-use system, 14 temporary sample plots (0.1 ha each) were established, with natural forest plots sampled in a nearby but ecologically comparable area, resulting in 84 total plots. The study revealed age-related differences in carbon sequestration among cashew trees, with carbon stocks ranging from 16.60 to 71.34 Mgha−1. The study also found significant differences in carbon sequestration among cashew trees aged 10 years and older and both age groups of cocoa trees, with a weak significant difference between cashew trees aged 10 years and older and natural forest. However, no significant difference was observed between cashew trees aged 10 years and older, and food-croplands. These findings highlight the potential of cashew agro-ecosystems in climate change mitigation, providing valuable insights for land-use planning and climate policy formulation.

加纳干旱半落叶带腰果农业生态系统与其他土地利用方式减缓气候变化潜力的比较
在加纳,腰果种植作为一种主要的土地利用类型正在迅速扩大。然而,其通过碳固存对减缓气候变化的贡献仍然难以量化。具体而言,比较腰果农业生态系统与同一生态区内其他主要土地利用(如可可种植园、遮荫粮食农田和天然林)的生物量碳固存潜力的经验数据有限。本研究通过评估不同年龄腰果树的生物量碳储量(地上和地下),并将其与可可树、粮食农田上的遮荫树和加纳干燥半落叶带的天然林进行比较,解决了这一差距。重点是植被生物量碳,不包括其他碳库。腰果和可可农业生态系统按年龄分组:10岁以下和10岁以上。对于每个土地利用系统,建立了14个临时样地(每个样地0.1公顷),并在附近但生态可比较的地区取样天然林样地,总共84个样地。该研究揭示了腰果树碳固存的年龄相关差异,其碳储量在16.60至71.34 Mgha−1之间。研究还发现,10年及以上腰果树的固碳量与可可树的两个年龄组之间存在显著差异,10年及以上腰果树与天然林之间存在微弱的显著差异。然而,在10年及以上的腰果树和粮食农田之间没有观察到显著差异。这些发现突出了腰果农业生态系统在减缓气候变化方面的潜力,为土地利用规划和气候政策制定提供了有价值的见解。
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来源期刊
Agroforestry Systems
Agroforestry Systems 农林科学-林学
CiteScore
5.30
自引率
9.10%
发文量
78
审稿时长
4.5 months
期刊介绍: Agroforestry Systems is an international scientific journal that publishes results of novel, high impact original research, critical reviews and short communications on any aspect of agroforestry. The journal particularly encourages contributions that demonstrate the role of agroforestry in providing commodity as well non-commodity benefits such as ecosystem services. Papers dealing with both biophysical and socioeconomic aspects are welcome. These include results of investigations of a fundamental or applied nature dealing with integrated systems involving trees and crops and/or livestock. Manuscripts that are purely descriptive in nature or confirmatory in nature of well-established findings, and with limited international scope are discouraged. To be acceptable for publication, the information presented must be relevant to a context wider than the specific location where the study was undertaken, and provide new insight or make a significant contribution to the agroforestry knowledge base
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