Enteric methane output and weight accumulation of Nguni and Bonsmara cows raised under different grazing conditions

Slayi, Mhlangabezi; Kayima, Denis; Jaja, Ishmael Festus; Mapiye, Cletos; Dzama, Kennedy

doi:10.1186/s13570-023-00275-7

Pastoralism

Research, Policy and Practice

Table 5 Means (± SEM) of methane production and other performance parameters as affected by the interaction

From: Enteric methane output and weight accumulation of Nguni and Bonsmara cows raised under different grazing conditions

		BCS	Bodyweight (kg)	DMI (kg/day)	CH₄ (g/day/head)	CH₄ (g/kg DMI)	CH₄ (g/100 kg BW)
Communal	Bonsmara	3.13^a ± 0.025	404.85^a ± 3.362	10.53^a ± 0.091	255.15^a ± 468	25.14^a ± 0.755	65.36^a ± 1.976
Communal	Nguni	3.00^b ± 0.025	358.69^b ± 3.440	9.33^b ± 0.093	248.64^a ± 4.792	27.71^a ± 0.772	72.09^a ± 2.021
Commercial	Bonsmara	3.34^a ± 0.025	443.34^a ± 3.390	12.41^a ± 0.092	253.49^a ± 4.723	21.06^a ± 0.761	58.96^a ± 1.992
Commercial	Nguni	3.10^b ± 0.025	377.35^b ± 3.390	10.57^b ± 0.092	227.11^b ± 4.723	21.92^a ± 0.761	61.37^a ± -1.992
Grazing × age
Communal	A	3.08^a ± 0.031	264.12^c ± 4.118	6.87^c ± 0.111	181.79^c ± 5.737	28.17^a ± 0.924	73.31^a ± 2.420
	B	3.10^a ± 0.031	403.15^b ± 4.209	10.48^b ± 0.114	270.79^b ± 5.864	26.48^a ± 0.945	68.84^a ± 2.473
	C	3.01^a ± 0.031	478.04^a ± 4.169	12.43^a ± 0.113	303.11^a ± 5.808	24.62^a ± 0.936	64.02^a ± 2.449
Commercial	A	3.18^ab ± 0.031	301.08^c ± 4.1178	8.43^c ± 0.111	170.86^b ± 5.737	21.05^a ± 0.924	58.94^a ± 2.420
	B	3.17^b ± 0.031	415.89^b ± 4.169	11.64^b ± 0.113	264.63^a ± 5.808	23.44^a ± 0.936	65.64^a ± 2.449
	C	3.30^a ± 0.031	514.06^a ± 4.169	14.39^a ± 0.113	285.42^a ± 5.808	19.97^a ± 0.936	55.91^a ± 2.449
Breed × age
Bonsmara	A	3.18^cb ± 0.031	301.06^c ± 4.118	8.15^c ± 0.111	175.46^c ± 5.737	23.12^a ± 0.924	62.16^ab ± 2.420
	B	3.19^b ± 0.031	427.74^b ± 4.118	11.56^b ± 0.111	279.14^b ± 5.737	24.93^a ± 0.924	67.14^a ± 2.420
	C	3.32^a ± 0.031	543.47^a ± 4.169	14.70^a ± 0.112	308.37^a ± 5.808	21.25^a ± 0.936	57.18^b ± 2.449
Nguni	A	3.07^a ± 0.031	264.14^c ± 4.118	7.15^c ± 0.111	177.19^c ± 5.737	26.10^a ± 0.924	70.08^a ± 2.420
	B	3.09^a ± 0.032	391.30^b ± 4.2601	10.57^b ± 0.115	256.28^b ± 5.935	24.99^a ± 0.956	67.35^a ± 2.503
	C	2.99^a ± 0.031	448.63^a ± 4.1685	12.12^a ± 0.112	280.16^a ± 5.808	23.34^a ± 0.936	62.75^a ± 2.449
Interactions				P-value
Grazing × breed		0.0996	0.0036	0.0004	0.0359	0.2606	0.2783
Grazing × age		0.0376	0.0046	0.0019	0.6094	0.0874	0.0721
Breed × age		0.1414	< 0.0001	< 0.0001	0.0219	0.2796	0.2716

Different letters “a, b, c, and d” represent significant interaction effects (P ≤ 0.05) between breeds, age groups and grazing systems

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