title: Mitigation of ammonia emissions from pig production using reduced dietary crude protein with amino acid supplementation.
abstract: To mitigate ammonia (NH3) emissions from pig production and understand dynamic emission profiles, reduced dietary crude protein (CP) with amino acid supplementation was studied with 720 pigs in a 12-room research building for 155days that covered from weaned to finishing stages. The pigs were divided into three 4-room groups and fed with 2.1-3.8% reduced CP (T1), 4.4-7.8% reduced CP (T2), and standard (control) diets, respectively. Compared with the control group, T1and T2decreased manure volumes and manure NH4+-N concentrations. Group-mean NH3emission from the control group was 68.9gd-1AU-1(AU=500kg live mass). Emissions from T1(46.7gd-1AU-1) and T2(29.8gd-1AU-1) were reduced by 33.0% and 57.2% (p<0.05), respectively. Dynamic peak NH3emissions appeared during the third nursery phase for T1and T2, but delayed to the first grower phase for the control group.
authors.affiliation: Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Shule
authors.initials: S
authors.lastname: Liu
authors.affiliation: Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, IN 47907, USA. Electronic address: jiqin@purdue.edu.
authors.forename: Ji-Qin
authors.initials: JQ
authors.lastname: Ni
authors.affiliation: Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: John S
authors.initials: JS
authors.lastname: Radcliffe
authors.affiliation: Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Caitlin E
authors.initials: CE
authors.lastname: Vonderohe
mesh_terms: D000596:Amino Acids; D000641:Ammonia / Q000378:metabolism*; D000821:Animal Feed; D000818:Animals; D004044:Dietary Proteins / Q000378:metabolism*; D008372:Manure; D034421:Sus scrofa; D013552:Swine
chemical_list: D000596:Amino Acids; D004044:Dietary Proteins; D008372:Manure; D000641:Ammonia
keywords: Air pollution abatement; Air quality; Animal feeding operation; Dietary manipulation; Pollution control; Swine production