TABLE 5.

Generation by methane and nitrous oxide by poultry.

Species	Methane generated	Nitrous oxide generated
	mg bird–1 day–1A	mg bird–1 day–1A
Muscovy duck	26.4
Mule	17.4
Domesticated goose	11.4	0.45B
	kg head–1 life cycle–1BC	kg head–1 life cycle–1BC
Broiler chickens	1.59 × 10–5	3 × 10–8
Village chickens	8.48 × 10–5	1.635 × 10–5
Geese	1.5 × 10–3	4.90 × 10–5

^AChen et al. (2014). ^BChen et al. (2003). ^CWang and Huang (2005).