Latest Publications

Abstract

Linear agricultural nutrient regimes are the principal cause for perturbation of the geochemical cycles for nitrogen (N) and phosphorus (P) and other planetary boundaries. Nutrient cycles are characterized by high spatial disparity and China is a hotspot due to high fertilizer application rates. Using substance flow analysis, this study identified and quantified nutrient flows from agricultural production to residue management of Huangyan tangerines (Citrus reticulata) and water bamboo (Zizania latifolia) in a case study of Huangyan district (Taizhou City, Zhejiang province). About 754 Mg/a of N and 105 Mg/a of P can theoretically be recovered in the tangerines and water bamboo systems from currently untapped material flows. This could replace 59% of the N and 15% of the P currently applied as chemical fertilizer, reducing environmental impacts. Combining the nutrient recovery of both systems and upscaling the results to Taizhou City, the goal from the 14th Five-Year Plan for Agricultural and Rural Modernization to save 1182 Mg of nutrients per year could be exceeded by almost 12 times. This study’s data have varying degrees of uncertainty. The analysis of data representativeness shows potential for improvements, especially in the agricultural production of water bamboo and the nutrient contents of material flows.

Huang, Huang; Qi, Jiaxin; Xiao, Suili; Wende, Wolfgang; Xin, Yingdu
in In: Land 13 (2024) 7: 989

Abstract

In recent years, awareness has grown of the vital importance of ecological systems, provoking increased research into how to improve their resilience. Here, one popular new technical/management solution is the creation of greenways along riversides. In practice, however, the practical outcomes of such greenways have sometimes been disappointing due to an excessive focus on technical solutions at the expense of a sufficient consideration of the social impact. This study intends to reflect on the problem by looking at the dynamics of land use for ecosystem functions at the macro scale as well as the relationship between the implementation of greenways and the local demand for diverse everyday activities, in particular, recreation opportunities, at the micro scale. Based on this, it aims to reveal practical solutions to bridge ecological usages and everyday needs that achieve better preservation and services of ecosystems. Taking the greenways along the Yongning River (YRG), which runs through the urban–rural areas and the urban–rural interface of Huangyan-Taizhou, as a case study, GIS analysis and anthropology approaches were applied. The results show that the YRG has systematically improved the riparian ecosystems by better connecting the eco-land use and preserving the waterfront. At the same time, its ability to fulfil the large potential for leisure and recreation services needs to improve. Residents living in different parts of the city had disparate requirements depending on their patterns of daily behaviour. We conclude that the successful implementation of greenways in cities should not only consider technological and nature-based solutions but also consider the socio-cultural background. The diversity of local needs regarding everyday activities and recreation will lead to an equivalent diversity in riparian landscape design.

Keywords: ecosystem services; waterfront greenway; recreation; nature-based solution; culture-based solution