title: The cumulative methane production from dairy cattle slurry can be explained by its volatile solid, temperature and length of storage.
abstract: In order to refine the national estimate of methane emission from stored cattle slurry, it is important to comprehend the basic characteristics of methane production. Two dairy cattle slurries were obtained from livestock farms located in Hokkaido (a northern island) and Kyushu (a southern island). The slurries were diluted with water into three levels: undiluted, three times diluted, and 10 times diluted. Three hundred mL of the slurries were put into a bottle with a headspace volume of 2.0 L, which was filled with nitrogen gas and then sealed by butyl rubber. Four levels of temperature were used for incubation: 35, 25, 15 and 5 °C. The time course of the cumulative methane production per volatile solid (VS) was satisfactorily expressed by an asymptotic regression model. The effect of dilution on the methane production per VS was not distinctive, but that of temperature was of primary importance. In particular, higher temperature yields a higher potential production and a shorter time when the cumulative production reaches half of the potential production. The inclusive and simple models obtained in this study indicate that the cumulative methane production from stored cattle slurry can be explained by VS, temperature and length of storage.
authors.affiliation: Department of Sustainable Agriculture, College of Agriculture, Food and Environment Sciences, Rakuno Gakuen University, Ebetsu, Hokkaido.
authors.forename: Takuji
authors.initials: T
authors.lastname: Sawamoto
authors.affiliation: Department of Sustainable Agriculture, College of Agriculture, Food and Environment Sciences, Rakuno Gakuen University, Ebetsu, Hokkaido.|Zukosha Co., Ltd., Obihiro, Hokkaido, Japan.
authors.forename: Megumi
authors.initials: M
authors.lastname: Nakamura
authors.affiliation: Department of Sustainable Agriculture, College of Agriculture, Food and Environment Sciences, Rakuno Gakuen University, Ebetsu, Hokkaido.
authors.forename: Kenji
authors.initials: K
authors.lastname: Nekomoto
authors.affiliation: Department of Sustainable Agriculture, College of Agriculture, Food and Environment Sciences, Rakuno Gakuen University, Ebetsu, Hokkaido.
authors.forename: Shinji
authors.initials: S
authors.lastname: Hoshiba
authors.affiliation: Animal Research Center, Hokkaido Research Organization, Shintoku, Hokkaido.
authors.forename: Keiko
authors.initials: K
authors.lastname: Minato
authors.affiliation: Kumamoto Prefectural Agricultural Research Center, Animal Husbandry Research Institute, Koushi, Kumamoto.
authors.forename: Motoo
authors.initials: M
authors.lastname: Nakayama
authors.affiliation: National Agriculture and Food Research Organization, Institute of Livestock and Grassland Science, Tsukuba, Ibaraki.
authors.forename: Takashi
authors.initials: T
authors.lastname: Osada
mesh_terms: D000818:Animals; D002417:Cattle; D003612:Dairying; D007564:Japan; D008372:Manure / Q000032:analysis*; D008697:Methane / Q000096:biosynthesis*; D015233:Models, Statistical; D012037:Refuse Disposal / Q000379:methods*; D013696:Temperature; D013997:Time Factors; D014835:Volatilization
chemical_list: D008372:Manure; D008697:Methane
keywords: dairy cattle slurry; methane; slurry storage; temperature dependency; volatile solid