Table 7.

Gas exchange and methane production of the goats fed the experimental diets.

Item	Diet 1			SEM	p-Value
	C	L	H
O2 consumption, L/d	570	561	619	42.9	0.540
CO2 production, L/d	620	605	690	54.2	0.457
RQ 2	1.09	1.08	1.11	0.022	0.390
CH4 production, L/d	53.0	48.1	60.9	6.89	0.396
CH4, g/d	38.0	34.5	43.7	4.94	0.396
CH4, g/kg DMI	20.9	18.9	20.7	1.46	0.582
CH4, g/kg OM intake	31.7	28.8	31.2	2.21	0.600
CH4, g/kg dOM 3	47.9	48.1	49.8	3.14	0.863
CH4, g/kg NDF intake	52.5	46.7	50.2	4.05	0.579
CH4, g/kg dNDF 4	117	121	119	11.6	0.971
CH4, % GE intake	6.07	5.27	5.78	0.43	0.415
CH4, % DE intake	9.35	8.29	9.32	0.68	0.882
CH4, g/kg milk	16.4	14.8	19.6	1.53	0.103
CH4, g/kg FPCM 5	17.6	14.7	18.1	1.98	0.452

¹ C = control diet; L = linseed diet; H = hemp seed diet. ² RQ = respiratory quotient (CO₂ production/O₂ consumption). ³ dOM: digested OM. ⁴ dNDF: digested NDF. ⁵ FPCM: fat and protein corrected milk.