Carbon/nitrogen ratio as a major factor for predicting the effects of organic wastes on soil bacterial communities assessed by DNA-based molecular techniques |
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Authors: | Ge Yuan Chen Chengrong Xu Zhihong Eldridge Simon M Chan Kwong Yin He Yan He Ji-Zheng |
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Institution: | (1) Centre for Forestry and Horticultural Research and School of Biomolecular and Physical Sciences, Griffith University, Nathan, Queensland, 4111, Australia;(2) Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;(3) Centre for Recycled Organics in Agriculture, NSW Department of Primary Industries, Richmond, NSW, 2753, Australia;(4) College of Environmental and Natural Resource Sciences, Zhejiang University, Hangzhou, 310029, China; |
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Abstract: | Background, aim, and scope Current Australian legislation permits the beneficial application of grease trap waste (GTW) to agricultural soil, viewing
it as a beneficial source of organic matter and soil conditioner containing no/low amounts of metals or pathogenic organisms.
However, little is known about the influence of GTW on soil bacterial community. A field experiment was established at Menangle
in south western Sydney in Australia to quantitatively assess the impacts of different types (GTW CO and GTW CL) and amounts
of GTW application on the soil bacterial community and diversity. Furthermore, a municipal solid waste (MSW) compost was simultaneously
examined to compare against the other organic wastes. Knowledge about the shifts in microbial community structure and diversity
following the applications of organic wastes could help to evaluate the ecological consequences on the soil and thus to develop
sound regulatory guidelines for the beneficial reuse of organic wastes in agricultural lands. |
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