Effects of a 20-year old Miscanthus × giganteus stand and its removal on soil characteristics and greenhouse gas emissions |
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| Affiliation: | 1. INRA, AgroParisTech, Environment and Arable Crops Research Unit, 78850 Thiverval-Grignon, France;2. AgroParisTech, INRA, Environment and Arable Crops Research Unit, 78850 Thiverval-Grignon, France;3. Centre for Ecology and Hydrology Edinburgh, Bush Estate, Penicuik EH26 0QB, UK;1. Department of Plant Physiology, Faculty of Agriculture and Economics, University of Agriculture, Podłużna 3, 30-239 Kraków, Poland;2. F. Górski Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Kraków, Poland;3. Institute of Plant Production, Department of Grassland, Faculty of Agriculture and Economics, University of Agriculture, Mickiewicza 21, Kraków, Poland;4. Department of Animal Nutrition and Feed Management, Faculty of Animal Sciences, University of Agriculture, Mickiewicza 24/28, Poland;5. Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Jagiellonska 28, 40-032 Katowice, Poland;6. Department of Grasses, Leguminous and Energy Crops, Plant Breeding and Acclimatization Institute, Radzików, 05-870 Błonie, Poland;1. DipSA – Department of Agricultural Sciences, University of Bologna,Viale Fanin 44, 40127 Bologna, Italy;2. Di3A – Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, Via Valdisavoia 5, 95123 Catania, Italy;1. Laboratoire Génie Civil et géo-Environnement (LGCgE), ISA Lille, 48 boulevard Vauban, 59046 Lille Cedex, France;2. University of Rwanda-College of Education, Remera Campus, KG 11 Avenue 47, P.O. Box 5039 Kigali, Rwanda;3. Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV), Université du Littoral Côte d''Opale (ULCO), 50 rue Ferdinand Buisson, 62228 Calais Cedex, France;4. Université de Carthage, Laboratoire des Sciences Horticoles, Institut National Agronomique de Tunisie, 43 Avenue Charles Nicolle, 1082 Tunis, Mahrajène, Tunisia;5. Biotechnologies et Gestion des Agents Pathogènes en Agriculture (BioGAP), Institut Charles Viollette, ISA Lille, 48 boulevard Vauban, 59046 Lille Cedex, France;1. Department of Plant Pathology, Physiology and Weed Science, 435 Old Glade Road, Virginia Tech, Blacksburg, VA 24061, USA;2. Department of Agronomy, Purdue University, West Lafayette, IN 47907, USA;3. Mendel BioEnergy Seeds, Mendel Biotechnology Inc., 3935 Point Eden Way, Hayward, CA 94545, USA;1. Department of Biobased Products and Energy Crops (340b), Institute of Crop Science, University of Hohenheim, Stuttgart 70599, Germany;2. College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, Hunan, PR China;3. College of Agronomy, Hunan Agricultural University, Changsha 410128, Hunan, PR China |
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| Abstract: | Miscanthus is a perennial rhizomatous C4 grass with high yield potentials and low nutrient needs, thus a promising candidate for the production of cellulosic biomass. While optimal management options and yields attainable on a commercial scale are still debated, no study has yet addressed its removal and potential effects on following crops. Here, we present results from a trial involving a 20-year old Miscanthus stand on i) soil C, N, P and K stocks, compared with an adjacent field cultivated with a rotation of annual arable food crops, ii) the greenhouse gases (GHG) emissions following the removal of Miscanthus and iii) the immediate short-term effects on the following land use (re-cultivation to wheat or set-aside).Compared to the adjacent field under annual crops, the Miscanthus plot had a larger soil organic C stock (by 13 t C ha−1) but a similar N stock, and lower P and K stocks (with differences of 100 kg P ha−1 and 1170 kg K ha−1, respectively). These losses imply that some degree of fertilization may be necessary as compensation. The effects of Miscanthus removal for the following wheat were significant on crop N content but negligible on grain yield.1.5 t CO2 ha−1 of CO2 were released after the Miscanthus removal and the N2O emissions increased from 150 g N2O-N ha−1 to 493 g N2O-N ha−1 during the following year. These results highlight the importance of investigation of the end-of-life stage of perennial crops for an accurate assessment of their environmental impacts. |
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| Keywords: | Soil nutrients Carbon storage Removal Greenhouse gas Nitrous oxide |
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