Research & reports

Daisuke Tachibana, Hitoshi Watanabe, Kei Yakushiji, Kenji Nakamura, Takaharu YOSHIOKA · AIJ Journal of Technology and Design · Global

This study conducted a four-year growth experiment with eighty ornamental plants, including perennials, bulbous plants, and shrubs, in an experimental rooftop garden using a rainwater storage planting base. It was found that various plant types could grow in a thin 10cm substrate depth, their bloom times and flowering periods were confirmed, and the rainwater storage system allowed for reduced irrigation frequency even in thin-layer planting.

Kevin C. Matteson, Gail Langellotto · Insect Conservation and Diversity · United States (New York City)

The ability of adding 70 plants of seven native wildflower species over two years to augment beneficial insect richness, including bees, butterflies, and predatory wasps, was assessed in New York City community gardens. Bayesian analyses failed to find a strong influence of the native plant additions on beneficial insect richness, even after correcting for prior floral abundance. Butterflies and megachilid bees were found to heavily utilize introduced ornamental and crop flowers in these gardens, even when native flowers were present.

Hiran Moran Ramon Soriano-Robles · Ateliê Geográfico · Mexico (Mexico City)

In peri-urban agriculture in Mexico City, a traditional multi-cropping agro-ecosystem combining diverse species like maize, beans, and amaranth is preserved. Maize and amaranth are central to productive activities and are part of Mexico City's biological and cultural heritage. The conservation and utilization of this diversity can enhance the genetic potential of native crops, contribute to local agricultural development and sustainability, and potentially offer alternatives for a future global food crisis.

Nerea Morán Alonso · · Global

This article reviews the historical background of urban agriculture, highlighting it as an example of action in crisis situations and the social potential of food production in urban contexts. In Southern countries, urban agriculture has gained importance as a development strategy, including programs led by international organizations. Urban gardens, by integrating nature into the city, contribute to urban metabolic efficiency and enhance biological diversity.

Lin Ma · Xibu linye kexue · China (Kunming)

A study on the seedling stage adaptability of 8 Magnoliaceae species was conducted in Chenggong county, Yunnan province, from 2004 to 2009. Results from five years of seedling raising indicated that Woonyoungia septentrionalis, Michelia ingrata, and Manglietia grandis were not adapted to Chenggong and died in frost. Michelia velutina showed very significant differences in height and basal diameter growth compared to other species, leading to its evaluation as the top choice for urban gardening and greening in Kunming city, followed by Manglietia maguanica and Michelia lacei.

윤혜경, 이연숙, 이홍성 · 한국생태환경건축학회 학술발표대회 논문집 · Global

This study investigates the utility of "Health Community Farming Gardens" within apartment buildings in Korea, aiming to present a realistic and effective apartment floor plan that enhances residents' health. Through a literature review of green infrastructure and urban farming, the research confirms that green infrastructure and urban farming revitalize apartment culture, effectively address ecosystem deterioration, and foster a green cultural spread within resident communities. The study emphasizes the innovation of integrating farming gardens into apartment buildings to maintain residents' holistic health.

Junping Liu · System Sciences and Comprehensive Studies in Agriculture · China (Beijing)

This paper constructed an evaluation index system for urban agricultural multi-functionality using factor analysis and analytic hierarchy process for 13 agriculture-related districts in Beijing. Based on GIS spatial analysis of function, Beijing was divided into three urban agricultural subareas according to production economy function, social service function, and ecological protection function. The results indicate that Beijing urban agriculture has an obvious 'core-periphery' spatial structure but with different function-orientation, locational tendency, and development patterns.

John Merson, Roger Attwater, Peter Ampt, Howard G. Wildman, Rosalie Chapple · International Journal of Agricultural Sustainability · Australia

This paper presents an overview of a four-year project examining the western edge of the Sydney basin in Australia — historically a major source of fruit and vegetables for Sydney markets — where rapid urban development expansion has caused a significant reduction in the number of small farms and market gardens. Urban and peri-urban agriculture in the region also serves as an important buffer between urban development and the neighboring Greater Blue Mountains World Heritage Area, with urban expansion and economies of scale identified as contributing to the decline of urban agriculture. The project explored options for supporting these vulnerable farming communities in terms of regulatory factors and economic and environmental sustainability, and investigated the role of agri-industries as landscape buffers to the neighboring World Heritage Area in relation to resilience, communities of practice, and ecosystem services. Working with targeted representative landholders, the study developed tools including an integrated bio-system approach using organic waste conversion and landscape function analysis to help address erosion, nutrient loss, and inefficient water management.

Lucy Bastin · · United Kingdom

Against a backdrop where about 90% of UK residents already live in towns or cities, and roughly 60% of the world's population is projected to live in urban areas by 2030, this essay argues that public land such as parks and allotments can easily be lost without a vocal set of "owners" to speak for it. It notes that most of the UK's "natural" areas have historically been created, managed, or modified by humans, and that overlooked brownfield sites can serve as valuable refuges for insect and plant species that can no longer persist in a countryside dominated by industrialized agriculture.

Yamane Kyoko, Lü Ning, Ohnishi Ohmi · Breeding Science, 59(1): 55-65 · Japan

Analyzing 25 chloroplast SSR loci across 59 cultivated radish accessions and 23 wild Raphanus accessions, the study found evidence for at least three independent domestication events and high genetic diversity in cultivated radish.

Colla S.R., Willis E., Packer L. · Cities and the Environment (CATE), 2(1):4 · Canada (Toronto area)

A foundational study comparing bee diversity and abundance on green roofs and ground-level sites near Toronto. With suitable plants and management, green roofs can host bee communities comparable to ground habitats, discussing implications for urban pollinator conservation and rooftop agriculture.

Buchmann C. · Human Ecology · Cuba (Trinidad de Cuba)

Using ethnobotanical fieldwork in Trinidad de Cuba, this study shows how home gardens serve as the most adaptable local land resource, with garden composition and management adapting in response to major events such as the Soviet collapse, bolstering household food security and social-ecological resilience.

Kevin C. Matteson, Gail Langellotto · Cities and the Environment · United States (New York City)

In 2005, a study compiled a list of crop plants in 19 New York City community gardens, classifying them by bee pollination dependence. Using mark-recapture methods, the abundance of the common eastern bumble bee (Bombus impatiens) was estimated. Wild populations of B. impatiens were found to be abundant in New York City community gardens, where it is the most prevalent native bee species and visits various crop flowers.

Veronica Gaylie · · Global

This book chronicles the establishment of a campus learning garden involving student teachers and environmental education students. Despite starting with no funding, the project resulted in a transformation of attitudes towards nature, community, and the learning process. The book examines this process through metaphors of the garden as environment, community, and transformation, bridging theory and practice for ecology-centered teaching.

Jin-Woo Choi, Hag-Kee Kim, Kyong-Jae Lee, Hyun-Kyung Kang · Journal of the Korean Institute of Landscape Architecture · South Korea

This study analyzed the economics and growth characteristics of native and imported ground cover plants in a new shallow soil rooftop gardening method, using 13cm soil thickness, on the rooftop of the Korean National Housing Corporation. The new method cost 45,000 won/m², which was 50% less expensive than existing methods. Native ground cover plants and some imported species showed increased cover rate, live weight, and dry weight, with improved growth, though some species required weed maintenance.

W.-L. Rao, Z.-K. Zhang, Runzhong Li · Plant Disease · China (Kunming)

In June 2007, sweet cherry trees with mottling and mosaic symptoms were observed in a private garden near Kunming, Yunnan Province, China. Twenty-four samples from sweet cherry, sour cherry, flowering cherry, and peach trees in private and community gardens were tested for eight viruses by RT-PCR. Cherry virus A (CVA) was detected in two symptomatic sweet cherry trees, marking the first report of CVA in sweet cherry in China.

XU Guang-zhong · Journal of Qinghai Normal University · China (Qinghai)

This analysis proposes the development of urban agriculture in Qinghai to address the ecological crisis arising from rapid urbanization. Urban agriculture, based on modern science and technology, integrates production, services, and consumption, possessing economic, ecological, and social functions. Promoting urban agriculture in Qinghai is stated to expand urban green areas and enhance the eco-city's functions.

Karin Ahrné, Jan Bengtsson, Thomas Elmqvist · PLoS ONE · Sweden (Stockholm)

This study investigated bumble bees in allotment gardens along an urbanization gradient from inner Stockholm to rural areas. Findings showed that bumble bee diversity decreased with increasing urbanization, from approximately eight species in rural areas to five to six species in urban allotment gardens. Higher variability in the abundance of certain species in the most urban areas suggested a potentially weaker reliability of the pollination ecosystem service in areas strongly influenced by human activity.

Yu Chen, Wong Nyuk Hien · Advances in Building Energy Research · Global

This chapter reviews three major types of urban greenery: public green areas, rooftop gardens, and vertical landscaping, from systematic and thermal benefit perspectives. It synthesizes worldwide research on these types of urban greenery and provides general guidelines for strategic landscaping in cities.

Pernilla Ouis, Ebba Lisberg Jensen · Malmö University Publications (Malmö University) · Sweden (Malmö)

This article examines the cultural parallelism between biological and cultural diversity as manifested in allotment garden areas in Malmö, Sweden, from a historical perspective. Using empirical data from interviews with allotment gardeners of different ethnic origins across Malmö, it shows how people bring their old plants and exchange varieties and species. This practice is argued to sometimes enhance contact and integration, and other times symbolize difference, contact with the country of origin, or ethnic identity.

Eric G. Strauss · Cities and the Environment · Global

This issue of CATE is dedicated to the theme of urban pollinators in relation to community gardens, addressing a gap in knowledge regarding pollinator ecology in urban landscapes. It notes that while pollinators' roles in agricultural systems are well-studied, their impact in community gardens is less understood. Six papers in this issue explore these questions, aiming to provide a foundation for understanding urban pollinators and guiding future research and management.

Xing Dong · China Environmental Protection Industry · Global

This paper introduces basic knowledge of rooftop gardens and discusses their various environmental benefits.

Marielle Dubbeling, Laura Bracalenti, Laura Lagorio · Open House International · Argentina (Rosario)

In Rosario, Argentina, city planners and university staff collaborated with two low-income communities to design and implement a multifunctional neighborhood park, public square, and road reserve for urban agriculture. A step-by-step participatory design process was followed. This participatory design contributed to improving socio-economic and environmental conditions in the city.

Wang Wen-zhen · Journal of Huangshi Institute of Technology · China (Huangshi)

Due to economic development, Huangshi, China, located along the Yangtze River, has shifted its agriculture from a production-centered peri-urban pattern to a multi-functional urban pattern encompassing production, ecology, and landscape. Integrating urban agriculture with Huangshi's notable location along the Yangtze River is believed to give its modern agriculture distinct features and a promising future.

Andreas Buerkert, Eva Schlecht, Martina Předotová, Rodrigue V.C. Diogo, Katja Kehlenbeck, Jens Gebauer · eScholarship (California Digital Library) · Sub-Saharan Africa

This study analyzed urban and peri-urban agriculture (UPA) systems in major Sub-Saharan African cities, measuring carbon, nitrogen, phosphorus, and potassium fluxes and conducting biodiversity studies. In Niamey, low-input gardens showed annual gaseous carbon emissions of 20-25 t ha-1, predominantly CO2, and high-input gardens irrigated with wastewater had annual CO2-C emissions of 27 t ha-1, with N2O as a major nitrogen loss contributor. Animal manure stored in the open was subject to large carbon and nitrogen losses, indicating environmental tradeoffs. However, UPA gardens in Niamey maintained a large variety of fruit and vegetable species, with richness increasing with garden and household size and commercialization.