Evaluation of methane production from maize silage by harvest of different plant portions |
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| Affiliation: | 1. Department of Agricultural and Environmental Sciences – Production, Landscape, Agroenergy, Università degli Studi di Milano, Via G. Celoria 2, 20133 Milano, Italy;2. Istituto Zooprofilattico Sperimentale della Lombardia e dell''Emilia Romagna “Bruno Ubertini”, Strada Campeggi 59/61, 27100 Pavia, Italy;1. State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, China;2. Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou 730000, China;3. State Key Laboratory of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China;4. Natural Resources Institute Finland (Luke), Tietotie 2C, FI-31600, Jokioinen, Finland;2. Department of Dairy Science, University of Wisconsin, Madison 53706;3. The William H. Miner Agricultural Research Institute, Chazy, NY 12921;4. Lallemand Animal Nutrition, Milwaukee, WI 53218;1. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China;2. Department Bioengineering, Leibniz Institute for Agricultural Engineering (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany;3. UK Biochar Centre, School of GeoSciences, University of Edinburgh, Crew Building, King’s Buildings, Edinburgh EH9 3JN, UK;1. Aarhus University, Department of Engineering, Blichers Allé 20, DK 8830 Tjele, Denmark;2. Electrochaea GmbH, Semmelweisstrasse 3, 82152, Planegg, Germany;1. Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, Santiago de Compostela, Spain;2. Department of Agricultural and Environmental Sciences, Production, Landscape, Agroenergy, Università degli Studi di Milano, Milano, Italy |
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| Abstract: | Biogas production is mainly based on the anaerobic digestion of cereals silages and maize silage is the most utilized. Regarding biogas production, the most important portion of the plant is the ear. The corn ear, due to high starch content, is characterized by a higher biogas production compared to the silage of the whole plant.In this paper, we present the results of experimental field tests carried out in Northern Italy that aim to evaluate the anaerobic methane potential (BMP) of different portions of ensiled maize hybrids. The BMP production is evaluated considering the possibility of harvesting and ensiling: the whole plant; the plant cut at 75 cm of height; the ear only; the plant without the ear. For the different solutions, the results are reported as specific BMP and as average biogas production achievable per hectare. The methane production by harvesting and ensiling the whole plant (10,212 and 10,605 m3 ha−1, for maize class 600 and 700, respectively) is higher than the ones achievable by the other plant portions (7961 and 7707 m3 ha−1, from the ear; 9523 and 9784 m3 ha−1, from the plant cut at 75 cm; 3328 and 3554 m3 ha−1, from the plant without the ear, for maize class 600 and 700, respectively). The harvest of the whole plant, although it is the most productive solution, could not be the best solution under an economic and environmental point of view. Harvesting only the ear can be interesting considering the new Italian subsidy framework and for the biogas plants fed by biomass transported over long distances. |
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| Keywords: | Anaerobic digestion Biomethane potential Maize Plant portions Corn ear silage |
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