Renewable resource for agricultural ecosystem in China: Ecological benefit for biogas by-product for planting |
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| Institution: | 1. State Key Laboratory of Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China;2. College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China;1. Service de neurologie, centre hospitalier de Pau, 4, boulevard Hauterive, 64046 Pau, France;2. Unité de mycologie moléculaire, centre national de référence mycoses invasives et antifongiques, Institut Pasteur, 25–28, rue du Docteur Roux, 75724 Paris cedex 15, France;3. CNRS URA3012, Institut Pasteur, 25–28, rue du Docteur Roux, 75724 Paris cedex 15, France;4. Service de maladies infectieuses et tropicales, centre d’infectiologie Necker-Pasteur, 149, rue de Sèvres, 75743 Paris cedex 15, France;1. University of Hohenheim, Institute of Crop Science, Biobased Products and Energy Crops, Fruwirthstr. 23, 70599, Stuttgart, Germany;2. University of Hohenheim, Institute of Crop Science, Biostatistics, Fruwirthstr. 23, 70599, Stuttgart, Germany;1. School of Geography, Geomatics and Planning, Jiangsu Normal University, Xuzhou 221116, China;2. Department of Environmental Science, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark;3. Tyndall Centre for Climate Change Research, School of International Development, University of East Anglia, Norwich NR4 7TJ, UK |
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| Abstract: | In China, renewable resources have attracted rising concerns in the sustainable development of circular agricultural economy because renewable resources are considered as a clean energy source and substitutes for chemical fertilizer in rural areas. However, a comprehensive analysis on renewable resources' effect on agricultural ecosystem is still absent. To fill the blank, this paper chose two typical planting-soil ecosystems including greenhouse-soil ecosystem and orchard-soil ecosystem to evaluate the amount of nonrenewable energy (NE) saving, ecological benefits and economic benefits by utilizing biogas fertilizer, in comparison to those by using chemical fertilizer. The results show that compared with chemical fertilizer treatment, in the greenhouse-soil ecosystem, the biogas fertilizer treatment can save 82667.18 MJ NE per hectare, reduce 6554.12 kg carbon dioxide (CO2) emission per hectare, improve soil fertility (soil organic matter, ammonia nitrogen, available phosphorus and available potassium), enhance plant quality (dry matter, solid content, reduced sugar, VC and soluble protein content), increase plant yield and add to 59,232.5 Yuan net income per hectare. We also found out that the optimum ratio of irrigation water and biogas fertilizer is water irrigated with 50% biogas slurry, which can lead to best fruit yield and quality in the orchard-soil ecosystem. It is concluded that promotion of biogas fertilizer can help China to realize low-carbon circular development of agriculture. |
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