Potential of urban green spaces for supporting horticultural production: a national scale analysis
Potential of urban green spaces for supporting horticultural production: a national scale analysis
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DOI：
10.1088/1748-9326/ac4730
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发表时间：
2021-12
影响因子：
6.7
通讯作者：
L. Walsh;B. Mead;C. Hardman;D. Evans;Lingxuan Liu;N. Falagán;S. Kourmpetli;Jessica A. C. Davies
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文献类型：
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作者：
L. Walsh;B. Mead;C. Hardman;D. Evans;Lingxuan Liu;N. Falagán;S. Kourmpetli;Jessica A. C. Davies
随着城市地区和土地使用限制的增加，人们越来越有兴趣利用城市空间进行粮食生产。几项研究发现，城市增长在补充水果和蔬菜生产方面具有巨大潜力，重点是一两个城市作为案例研究，而其他研究则评估了全球规模的潜力。在这里，我们提供了一个全国范围内的城市绿色空间的园艺生产潜力的分析，这是一个农业食品和城市发展政策制定的相关规模使用英国（GB）作为案例研究。确定了GB中可用于园艺生产的城市绿色空间，并根据三种生产方案量化了潜在产量。在26个城镇和城市的城市绿色空间分布在GB检查，了解生产潜力相比，其总的程度和人口。GB中的城市绿色空间在其上限上能够支持比目前国内水果和蔬菜产量高8倍的生产。这相当于目前国内生产和进口总和的38%，如果排除不适合GB种植条件的外来水果和蔬菜，则超过400%。全国大多数城市绿色空间被发现属于少数几个类别，私人住宅花园和舒适空间构成了大部分空间。通过进一步详细研究GB中的城镇和城市，我们发现，绿色空间的面积在不同规模的城市大都市之间没有很大的差异，并且都被发现有很大的潜力来满足当地城市人口的饮食需求。这项研究强调，可以适当制定国家政策，支持城市农业，利用城市绿色空间进行粮食生产，有助于提高国家粮食系统对进口途径冲击或国内生产和分配中断的抵御能力。
As urban areas and land-use constraints grow, there is increasing interest in utilizing urban spaces for food production. Several studies have uncovered significant potential for urban growing to supplement production of fruit and vegetables, focusing on one or two cities as case studies, whilst others have assessed the global scale potential. Here, we provide a national-scale analysis of the horticultural production potential of urban green spaces, which is a relevant scale for agri-food and urban development policy making using Great Britain (GB) as a case study. Urban green spaces available for horticultural production across GB are identified and potential yields quantified based on three production options. The distribution of urban green spaces within 26 urban towns and cities across GB are then examined to understand the productive potential compared to their total extent and populations. Urban green spaces in GB, at their upper limit, have the capacity to support production that is 8× greater than current domestic production of fruit and vegetables. This amounts to 38% of current domestic production and imports combined, or >400% if exotic fruits and vegetables less suited to GB growing conditions are excluded. Most urban green spaces nationally are found to fall within a small number of categories, with private residential gardens and amenity spaces making up the majority of space. By examining towns and cities across GB in further detail, we find that the area of green space does not vary greatly between urban conurbations of different sizes, and all are found to have substantial potential to meet the dietary needs of the local urban population. This study highlights that national policies can be suitably developed to support urban agriculture and that making use of urban green spaces for food production could help to enhance the resilience of the national-scale food system to shocks in import pathways, or disruptions to domestic production and distribution.