Animal Husbandry Research Institute

Kumamoto-shi, Japan

Animal Husbandry Research Institute

Kumamoto-shi, Japan
SEARCH FILTERS
Time filter
Source Type

Sawamoto T.,Rakuno Gakuen University | Nakamura M.,Rakuno Gakuen University | Nekomoto K.,Rakuno Gakuen University | Hoshiba S.,Rakuno Gakuen University | And 3 more authors.
Animal science journal = Nihon chikusan Gakkaiho | Year: 2016

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. © 2015 Japanese Society of Animal Science.


PubMed | Animal Research Center, Rakuno Gakuen University, Institute of Livestock and Grassland Science and Animal Husbandry Research Institute
Type: Journal Article | Journal: Animal science journal = Nihon chikusan Gakkaiho | Year: 2016

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 2.0L, which was filled with nitrogen gas and then sealed by butyl rubber. Four levels of temperature were used for incubation: 35, 25, 15 and 5C. 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.

Loading Animal Husbandry Research Institute collaborators
Loading Animal Husbandry Research Institute collaborators