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Field Measurement of Carbon Dioxide, Methane and Nitrous oxide Emissions from Manure Stockpile and Open Exercise Yard of a Typical Dairy Farm in China by Chamber Technique
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: 2015 ASABE Annual International Meeting 152171852.(doi:10.13031/aim.20152171852)
Authors: Luyu Ding, Qikun Lu, Lina Xie, Jie Liu, Wei Cao, Zhengxiang Shi, Baoming Li, Shixi Ren, Chaoyuan Wang, Guoqiang Zhang
Keywords: greenhouse gas emissions, dairy cow, exercise yard, manure stockpile
Abstract. In typical dairy production and management system of China, outdoor exercise yard and stockpiles play a major role in emissions of pollutants to atmosphere. GHG (CO2, CH4 and N2O) emissions from brick-paved yard and manure stockpiles of a typical dairy farm in Beijing were measured by closed chamber in four different seasons. There are cubicles in the yard and manure in the yard was removed once a day by tractor. CO2, CH4 and N2O emissions from the yard were within the range of 0.2~42 mg m-2 min-1, 1~616 ug m-2 min-1 and 0.3~129 ug m-2 min-1 in different seasons, respectively. GHG emissions from exercise yard showed a seasonal variation. GHG emission rates from different zones (cubicle zone vs. aisle zone) of the lot greatly varied, and the emissions were significantly affected by manure removal strategy (P<0.05). The zone near cubicles on the yard had more excreta and higher CO2 and CH4 emissions (P<0.05), while N2O emissions showed a disparity in different seasons. Compared with the result before manure removal, N2O emissions were greatly higher after manure removal both at aisle and cubicle zones (P<0.05). Stacking height of the manure stockpiles measured was averaged at 55±12 cm. CO2, CH4 and N2O emissions from manure stockpiles were 4~168 mg m-2 min-1, 0.02~1.79 mg m-2 min-1 and 0.62~536 ug m-2 min-1, respectively. GHG emissions from stockpile also showed a seasonal variation. Volatile solid in manure and temperature were the key factors affecting CO2 and CH4 emissions. N2O emissions were affected by manure storage duration.(Download PDF) (Export to EndNotes)