Section 20: Methane determining factors - Revision history

Bgolden: Bgolden moved page Methane determining factors to Section 20: Methane determining factors without leaving a redirect

2025-04-25T14:05:51Z

Bgolden moved page Methane determining factors to Section 20: Methane determining factors without leaving a redirect

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Bgolden at 13:48, 25 April 2025

2025-04-25T13:48:22Z

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			<b>NOTE: This version of Section 20 has been approved by the working group's Chair. Please be aware that further revisions may occur before final review and approval by the Board and ICAR members per the [[Approval of Page Process]].
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	== Diet and rumen microbiota ==		== Diet and rumen microbiota ==
	Table 1 contains a list of dietary or microbiota factors that determine CH<sub>4</sub> production.		Table 1 contains a list of dietary or microbiota factors that determine CH<sub>4</sub> production.

Lbenzoni: /* Host genetics, physiology and environment */

2024-03-05T14:43:27Z

Host genetics, physiology and environment

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Lbenzoni at 14:28, 5 March 2024

2024-03-05T14:28:57Z

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Lbenzoni at 09:25, 20 February 2024

2024-02-20T09:25:07Z

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Lbenzoni at 09:10, 20 February 2024

2024-02-20T09:10:39Z

← Older revision		Revision as of 09:10, 20 February 2024
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	\|DMI was also the most important determining factor, but there were different regression lines for maize silage and dried grass as the main roughage component respectively:		\|DMI was also the most important determining factor, but there were different regression lines for maize silage and dried grass as the main roughage component respectively:
	<math>CH4\ (g)=93+16.8\times DMI(kg)</math>		<math>CH4\ (g)=93+16.8\times DMI(kg)</math>
	<math>CH4\ (g)=81+14.0\times DMI(kg)</math>Methane release was particularly dependent on the intake of crude fiber (CF) and ether extract (EE): <math>CH4\ (g)=63+80xCF\ (kg)+11xNFE\ (kg)+19xCP(kg)-195xEE\ (kg)</math>		<math>CH4\ (g)=81+14.0\times DMI(kg)</math>

			Methane release was particularly dependent on the intake of crude fiber (CF) and ether extract (EE):

			<math>CH4\ (g)=63+80xCF\ (kg)+11xNFE\ (kg)+19xCP(kg)-195xEE\ (kg)</math>
	\|Kirchgessner et al., 1991		\|Kirchgessner et al., 1991
	\|-		\|-

Lbenzoni at 08:14, 20 February 2024

2024-02-20T08:14:10Z

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	\|Jentsch et al., 2007		\|Jentsch et al., 2007
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	\|DMI was also the most important determining factor, but there were different regression lines for maize silage and dried grass as the main roughage component: CH4 (g)=93+16.~~8×DMI~~(kg) ~~and~~ CH4 (g)=81+14.~~0×DMI~~(kg)~~, respectively.~~ Methane release was particularly dependent on the intake of crude fiber (CF) and ether extract (EE): CH4 (g)=63+80xCF (kg)+11xNFE (kg)+19xCP(kg)-195xEE (kg).		\|DMI was also the most important determining factor, but there were different regression lines for maize silage and dried grass as the main roughage component respectively:
			<math>CH4\ (g)=93+16.8\times DMI(kg)</math>
			<math>CH4\ (g)=81+14.0\times DMI(kg)</math>Methane release was particularly dependent on the intake of crude fiber (CF) and ether extract (EE): <math>CH4\ (g)=63+80xCF\ (kg)+11xNFE\ (kg)+19xCP(kg)-195xEE\ (kg)</math>
	\|Kirchgessner et al., 1991		\|Kirchgessner et al., 1991
	\|-		\|-
	\|Methane linearly increased with NDF intake (CH4 (L)=59.~~4×NDF~~[kg]+ 64.6) for cows together with their calves independent of the breed.		\|Methane linearly increased with NDF intake <math>CH4\ (L)=59.4\times NDF[kg]+ 64.6</math> for cows together with their calves independent of the breed.
	\|Estermann et al., 2002		\|Estermann et al., 2002
	\|-		\|-
	\|Enteric CH4 could be predicted with the equation: CH4 (g/d)=84+~~47×cellulose~~(kg/d)+~~32×starch~~(kg/d)+~~62×sugars~~ (kg/d).		\|Enteric CH4 could be predicted with the equation:
			<math>CH4\ (g/d)=84+47\times cellulose(kg/d)+32\times starch(kg/d)+62\times sugars\ (kg/d)</math>
	\|Hindrichsen et al., 2005		\|Hindrichsen et al., 2005
	\|-		\|-

Lbenzoni: /* HOST GENETICS, PHYSIOLOGY AND ENVIRONMENT */

2024-02-14T19:59:52Z

HOST GENETICS, PHYSIOLOGY AND ENVIRONMENT

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	\|}Table 1. Methane determining factors related to diet and rumen microbiota.		\|}Table 1. Methane determining factors related to diet and rumen microbiota.

	== ~~HOST GENETICS~~, ~~PHYSIOLOGY AND ENVIRONMENT~~ ==		== Host genetics, physiology and environment ==
	A low-moderate proportion of variation in CH4 emissions among ruminants is under genetic control. Heritability coefficients of MeY and RMPR were h²=0.22 and 0.19 respectively in a population of 1,043 Angus growing steers and heifers measured during 2 days in RC (Donoghue et al., 2016). The heritability coefficient of MeY was h²=0.13 in a population of		A low-moderate proportion of variation in CH4 emissions among ruminants is under genetic control. Heritability coefficients of MeY and RMPR were h²=0.22 and 0.19 respectively in a population of 1,043 Angus growing steers and heifers measured during 2 days in RC (Donoghue et al., 2016). The heritability coefficient of MeY was h²=0.13 in a population of

Lbenzoni: /* DIET AND RUMEN MICROBIOTA */

2024-02-14T19:59:25Z

DIET AND RUMEN MICROBIOTA

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	== ~~DIET AND RUMEN MICROBIOTA~~ ==		== Diet and rumen microbiota ==
	Table 1 contains a list of dietary or microbiota factors that determine CH<sub>4</sub> production.		Table 1 contains a list of dietary or microbiota factors that determine CH<sub>4</sub> production.
	{\| class="wikitable"		{\| class="wikitable"

Lbenzoni: /* DIET AND RUMEN MICROBIOTA */

2024-02-14T19:59:05Z

DIET AND RUMEN MICROBIOTA

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	===DIET AND RUMEN MICROBIOTA===		== DIET AND RUMEN MICROBIOTA ==
	Table 1 contains a list of dietary or microbiota factors that determine CH<sub>4</sub> production.		Table 1 contains a list of dietary or microbiota factors that determine CH<sub>4</sub> production.
	{\| class="wikitable"		{\| class="wikitable"
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	\|Wims et al., 2010		\|Wims et al., 2010
	\|}Table 1. Methane determining factors related to diet and rumen microbiota.		\|}Table 1. Methane determining factors related to diet and rumen microbiota.
	===HOST GENETICS, PHYSIOLOGY AND ENVIRONMENT===
			== HOST GENETICS, PHYSIOLOGY AND ENVIRONMENT ==
	A low-moderate proportion of variation in CH4 emissions among ruminants is under genetic control. Heritability coefficients of MeY and RMPR were h²=0.22 and 0.19 respectively in a population of 1,043 Angus growing steers and heifers measured during 2 days in RC (Donoghue et al., 2016). The heritability coefficient of MeY was h²=0.13 in a population of		A low-moderate proportion of variation in CH4 emissions among ruminants is under genetic control. Heritability coefficients of MeY and RMPR were h²=0.22 and 0.19 respectively in a population of 1,043 Angus growing steers and heifers measured during 2 days in RC (Donoghue et al., 2016). The heritability coefficient of MeY was h²=0.13 in a population of