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

Abstract

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