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Determination of GHG and ammonia emissions from stored dairy cattle slurry by using a floating dynamic chamber
Author(s) -
MINATO Keiko,
KOUDA Yasuyuki,
YAMAKAWA Masaaki,
HARA Satoshi,
TAMURA Tadashi,
OSADA Takashi
Publication year - 2013
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/j.1740-0929.2012.01053.x
Subject(s) - zoology , slurry , ammonia , chemistry , greenhouse gas , trace gas , daytime , environmental science , diurnal temperature variation , atmospheric sciences , environmental engineering , physics , ecology , organic chemistry , biology
We developed a system for measuring emissions from stored slurry by using a floating dynamic chamber. CH 4 , CO 2 , N 2 O and NH 3 emitted from the storage tank of a dairy cattle farm in eastern Hokkaido were measured during summer 2008 (7/16–8/6), fall 2008 (10/2–10/26), spring 2009 (6/2–6/21) and winter 2009 (3/11). Average daily gas emission rates in summer, fall and spring were, respectively, 54.8, 54.2 and 34.3 g/m 2 for CH 4 ; 602, 274 and 254 g/m 2 for CO 2 ; 55.4, 68.2 and trace mg/m 2 for N 2 O; and 0.55, 0.73 and 0.46 g/m 2 for NH 3 . CH 4 , CO 2 and NH 3 emission rates during the brief measurement period in winter were reduced to 1/4, 1/23 and 1/2, respectively, of summer emission rate levels. All gas emissions showed diurnal fluctuation and were greatest during the daytime, when the ambient temperature rose. CH 4 , NH 3 and CO 2 emissions increased significantly during the daytime, and the daily emission (in grams) of each gas was positively correlated with maximum daily temperature. According to the combined spring, summer and fall measurements, the CH 4 , N 2 O and NH 3 annual emission factors were 1.42% (g CH 4 /g volatile solids), 0.02% (g N 2 O‐N/g total N) and 0.43% (g NH 3 ‐N/g total N), respectively.