Ammonia deposition in the neighbourhood of an intensive cattle feedlot in Victoria, Australia
Jianlin Shen, Deli Chen, Mei Bai, Jianlei Sun, Trevor Coates, Shu Kee Lam, Yong Li
Scientific Reports | NATURE PUBLISHING GROUP | Published : 2016
Intensive cattle feedlots are large emission sources of ammonia (NH3), but NH3 deposition to the landscape downwind of feedlots is not well understood. We conducted the first study in Australia to measure NH3 dry deposition within 1 km of a commercial beef cattle feedlot in Victoria. NH3 concentrations and deposition fluxes decreased exponentially with distance away from the feedlot. The mean NH3 concentrations decreased from 419 μg N m(-3) at 50 m to 36 μg N m(-3) at 1 km, while the mean NH3 dry deposition fluxes decreased from 2.38 μg N m(-2) s(-1) at 50 m to 0.20 μg N m(-2) s(-1) at 1 km downwind from the feedlot. These results extrapolate to NH3 deposition of 53.9 tonne N yr(-1) in the a..View full abstract
Awarded by National Natural Science Foundation of China
This research was financially supported by the Meat & Livestock Australia, China Scholarship Council and the National Natural Science Foundation of China (41371303). We acknowledge the valuable advice from Dr. Tom Denmead, Dr. Sean McGinn and Dr. Thomas Flesch on experimental design and Dr. Guoping Liu for his field assistance during the experiment. We also thank Dr. Arvin Mosier for his English polishing for the manuscript.