A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydrogen sulfide emissions from a swine building affected by dietary crude protein
Hydrogen sulfide (H.sub.2S) is a toxic air pollutant at animal facilities; but the understanding of its generation and emission processes has been limited. This paper studied H.sub.2S emissions during a complete cycle of wean-finish pigs from a research building, where 12 pig rooms were divided into three groups that were fed with standard feed (control), and 2.1-3.8% (T.sub.1) and 4.4-7.8% (T.sub.2) reduced dietary crude protein (CP) feed. The group cycle mean H.sub.2S emission rates were 4.0 [+ or -] 2.9, 4.3 [+ or -] 3.2, and 5.4 [+ or -] 4.0 g d.sup.-1 AU.sup.-1 (Animal Unit = 500 kg live mass), respectively, for the control, T.sub.1, and T.sub.2 groups. Emissions of H.sub.2S were promoted by 10.0 and 36.7%, respectively, for the T.sub.1 and T.sub.2 groups (p < 0.001), although large variabilities existed in the emissions from different rooms within the same groups. The enhanced H.sub.2S emissions from the T.sub.1 and T.sub.2 groups were related to the reduced manure pH and were possibly affected through a number of pathways, which could involve volatile fatty acids and nitrogen concentrations, and microbial activities in manure.
Hydrogen sulfide emissions from a swine building affected by dietary crude protein
Hydrogen sulfide (H.sub.2S) is a toxic air pollutant at animal facilities; but the understanding of its generation and emission processes has been limited. This paper studied H.sub.2S emissions during a complete cycle of wean-finish pigs from a research building, where 12 pig rooms were divided into three groups that were fed with standard feed (control), and 2.1-3.8% (T.sub.1) and 4.4-7.8% (T.sub.2) reduced dietary crude protein (CP) feed. The group cycle mean H.sub.2S emission rates were 4.0 [+ or -] 2.9, 4.3 [+ or -] 3.2, and 5.4 [+ or -] 4.0 g d.sup.-1 AU.sup.-1 (Animal Unit = 500 kg live mass), respectively, for the control, T.sub.1, and T.sub.2 groups. Emissions of H.sub.2S were promoted by 10.0 and 36.7%, respectively, for the T.sub.1 and T.sub.2 groups (p < 0.001), although large variabilities existed in the emissions from different rooms within the same groups. The enhanced H.sub.2S emissions from the T.sub.1 and T.sub.2 groups were related to the reduced manure pH and were possibly affected through a number of pathways, which could involve volatile fatty acids and nitrogen concentrations, and microbial activities in manure.
Hydrogen sulfide emissions from a swine building affected by dietary crude protein
Liu, Shule (author) / Ni, Ji-Qin / Radcliffe, John S / Vonderohe, Caitlin
2017
Article (Journal)
English
BKL:
43.00
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