改善水资源管理可提高撒哈拉以南非洲城市粮食流域的粮食自给率

IF 9.8 1区 经济学 Q1 FOOD SCIENCE & TECHNOLOGY
Christian Siderius , Ype van der Velde , Marijn Gülpen , Sophie de Bruin , Hester Biemans
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引用次数: 0

摘要

撒哈拉以南非洲不断增长的城市粮食需求将对当地资源边界(如可用土地面积和水资源)造成压力。在评估未来城市中心可从附近地区获取粮食的程度时,先前的分析主要集中在农艺措施上,目的是缩小产量差距。在此,我们根据城市 "粮食流域 "的概念,探讨了当地节水措施的潜力,以帮助撒哈拉以南非洲地区在 2061-2070 年之前实现粮食自给自足。我们发现,雄心勃勃而又合理的节水措施,主要是提高雨水灌溉土地的生产率,有可能使粮食总产量增加 12%,所有主要食物区的粮食自给率水平达到 75%以上,整个地区实现自给自足。产量的增加可将预计需要扩大的农业用地限制在 25% 以上,这对生物多样性、与土地使用有关的冲突和碳螯合具有重要影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improved water management can increase food self-sufficiency in urban foodsheds of Sub-Saharan Africa

Rising urban food demand in Sub-Saharan Africa will put pressure on local resource boundaries, such as the available land area and water resources. In assessing the extent to which urban centres can source from nearby areas in future, earlier analysis has concentrated on agronomic measures, aiming at yield gap closure. Here, we address the potential of local water conservation measures to help achieve food self-sufficiency in Sub-Saharan Africa by 2061–2070, along the concept of urban ‘foodsheds’, matching crop-based food supply and demand in the surroundings of large cities for all major food groups. We find that ambitious but plausible levels of water conservation, primarily raising productivity on rainfed lands, have the potential to increase overall food production by 12% and food self-sufficiency levels in all major foodsheds to over 75%, with the region as a whole becoming self-sufficient. The increase in production could limit the projected required expansion of agricultural land use by more than 25%, which has important implications for biodiversity, land use-related conflicts and carbon sequestration.

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来源期刊
CiteScore
20.90
自引率
3.40%
发文量
69
期刊介绍: Global Food Security plays a vital role in addressing food security challenges from local to global levels. To secure food systems, it emphasizes multifaceted actions considering technological, biophysical, institutional, economic, social, and political factors. The goal is to foster food systems that meet nutritional needs, preserve the environment, support livelihoods, tackle climate change, and diminish inequalities. This journal serves as a platform for researchers, policymakers, and practitioners to access and engage with recent, diverse research and perspectives on achieving sustainable food security globally. It aspires to be an internationally recognized resource presenting cutting-edge insights in an accessible manner to a broad audience.
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