Mitigation of ammonia emissions from pig production using reduced dietary crude protein with amino acid supplementation. (June 2017)

• Record Type: Journal Article
• Authors: Liu, Shule; Ni, Ji-Qin; Radcliffe, John S.; Vonderohe, Caitlin E.
• Is Part Of: Bioresource technology. Volume 233(2017)
• Page Start: 200
• Page End: 208
• Publication Date: 2017-06
• Subjects: Air quality -- Air pollution abatement -- Animal feeding operation -- Dietary manipulation -- Pollution control -- Swine production; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.02.082
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Mitigating ammonia from a 720-pig research building was studied for 155 days. Two crude protein (CP) reduced diets were compared with standard diet for the pigs. Two groups of pigs fed with CP-reduced diets emitted 33% and 57% less ammonia. Manure volumes and NH4 + -N in manure decreased as the CP reduced in the feed. Peak emissions occurred earlier in growth stages for the treated than the control. 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 155 days 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, T1 and T2 decreased manure volumes and manure NH4 + -N concentrations. Group-mean NH3 emission from the control group was 68.9 g d −1 AU −1 (AU = 500 kg live mass). Emissions from T1 (46.7 g d −1 AU −1 ) and T2 (29.8 g d −1 AU −1 ) were reduced by 33.0% and 57.2% ( p < 0.05), respectively. Dynamic peak NH3 emissions appeared during the third nursery phase for T1 and T2, but delayed to the first grower phase for the control group.