Nutrient Leaching in Urban Agriculture, Effects of Waste Water Irrigation and Biochar Application to a Petroplinthic Cambisol in N-Ghana
Steffen Werner1, Edmund Kyei Akoto-Danso2, Delphine Manka'abusi2, Christoph Steiner2, Volker Häring1, Andreas Buerkert2, Bernd Marschner1
1Ruhr-Universität Bochum, Inst. of Geography, Soil Science and Soil Ecology, Germany
Urban Agriculture (UA) in developing countries can contribute significantly to food security and diversity. Excessive use of fertilisers, manures and waste water is well documented in the literature. This may lead to high losses of nutrients through leaching especially when irrigation exceeds the demands. Until today very little work was done to measure nutrient leaching, ways to prevent it and consequently increase nutrient use in UA. Biochar (BC) as a soil amendment received considerable attention in recent years for its potential to increase soil carbon stocks, crop yields and reduce nutrient leaching. Since production of BC is inexpensive and does not require sophisticated technology it may be a good strategy to improve soil fertility and reduce nutrient losses.
Keywords: Biochar, nutrient leaching, urban agriculture, waste water
Contact Address: Steffen Werner, Ruhr-Universität Bochum, Inst. of Geography, Soil Science and Soil Ecology, Universitätstr. 140, 44801 Bochum, Germany, e-mail: steffen.wernerrub.de