ESTIMATING THE POTENTIAL OF ACHIEVING SELF-RELIANCE BY ROOFTOP GARDENING IN CHIAYI CITY, TAIWAN
ESTIMATING THE POTENTIAL OF ACHIEVING SELF-RELIANCE BY ROOFTOP GARDENING IN CHIAYI CITY, TAIWAN
复制标题
评估台湾嘉义市通过屋顶园艺实现自力更生的潜力
DOI：
10.2495/dne-v12-n4-448-457
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发表时间：
2018
影响因子：
--
通讯作者：
T. Lee
中科院分区：
文献类型：
--
作者：
Y. Hsieh;Jung;T. Lee
全球一半以上的人口选择居住在城市地区而不是农村地区。这导致城市地区可持续粮食供应问题。将蔬菜和水果从农村运输到城市并保持新鲜会消耗能源并造成损失。考虑到成本，在城市及其周边地区种植粮食从来就不是什么新鲜事。然而，直到最近，以商业规模在屋顶种植粮食以实现自力更生才越来越受到关注。随着当前园艺和农业技术的进步，通过在城市屋顶种植来确保粮食供应变得更有可能。在人口密度高或经历下雪冬季的高收入社会中，只有少数商业规模的案例能够负担得起并证明选择如此高投入和高产量的种植系统是合理的。在台湾，由于冬季温暖，应用该系统可能更可行，因为与温带气候地区相比，达到相同产量所需的能源输入较少。通过评估高密度城市通过屋顶种植系统实现自力更生的潜力，决策者可以更深入地了解如何推广这一想法。截至2016年底，嘉义市的人口密度仅次于首都。因此，本研究旨在评估嘉义通过在屋顶种植粮食实现自力更生的潜力。它分析了四种类型屋顶栽培系统的产量，并估算了在不同土地用途（商业、教育和住宅）的三种类型屋顶上使用这些系统的产量和消耗量。结果显示，实现自力更生的最佳方案是商业规模运营的屋顶水培温室模式，尽管这对于嘉义市的普通家庭来说不可持续或不实用。
More than half of the global population has chosen to live in urban areas than in rural areas. This results in issues on sustainable food provision in urban areas. Transporting vegetables and fruits from the countryside to the city while keeping them fresh consumes energy and causes loss. Given the cost, growing food in and around cities has never been a new thing. However, only recently, growing food on rooftops on a business scale to achieve self-reliance has increasingly gained attention. With current technological advances in horticulture and agriculture, it has become more likely to secure food provision by cultivating on urban rooftops. Only a few business scale cases reported in high-income societies with a high-density population or experiencing snowing winter can afford and justify the choice of such a high input as well as a high-yield cultivating system. In Taiwan, with a warm winter, it may be more feasible to apply this system because less energy input is required to achieve the same yield as compared to that required in places in temperate climates. By estimating the potential of a high-density city to achieve self-reliance through rooftop growing systems, decision-makers can have more insight into how the idea can be promoted. As of end 2016, Chiayi city has the second largest population density after the capital city. Thus, this research aims at assessing the potential to achieve self-reliance by growing food on rooftops in Chiayi. It analyzes the yields of four types of rooftop cultivating systems and estimates the production and consumption by using these systems on three types of rooftops in different land uses, namely commercial, educational and residential. The result shows that the best scenario for achieving self-reliance is the rooftop hydroponic greenhouse model operating at the commercial scale although this is not sustainable or practical for general households in Chiayi City.