A meta-analysis was conducted to statistically determine the effects of lipid supplementation on methane (CH4) production, milk production, and milk composition of lactating dairy cows. For this purpose, it database was built using seven scientific publications (25 diets) available in the literature and reporting the effects of lipid supplementation on CH4 production, milk production, and milk composition. Lipid supplementation decreased (P < 0.05) dry matter intake (DMI) by 6.4% compared with control diets, whereas production of milk and 4% FCM and milk composition were not changed (P > 0.05). Lipid supplementation decreased (P < 0.05) CH4 production by 9%, either expressed as MJ d(-1) or as a percentage of gross energy intake (GEI), digestible energy intake (DEI), or metabolizable energy intake (MEI). This reduction was mainly a consequence of it decreased DMI.
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Penn State Univ, Dept Anim Sci, State Coll, PA 16802 USA
Swiss Fed Inst Technol, Dept Environm Sci, CH-8092 Zurich, SwitzerlandPenn State Univ, Dept Anim Sci, State Coll, PA 16802 USA
Raisanen, S. E.
Lapierre, H.
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Agr & Agrifood Canada, Sherbrooke, PQ J1M 0C8, CanadaPenn State Univ, Dept Anim Sci, State Coll, PA 16802 USA
Lapierre, H.
Price, W. J.
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Univ Idaho, Stat Programs, Moscow, ID 83844 USAPenn State Univ, Dept Anim Sci, State Coll, PA 16802 USA
Price, W. J.
Hristov, A. N.
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Penn State Univ, Dept Anim Sci, State Coll, PA 16802 USAPenn State Univ, Dept Anim Sci, State Coll, PA 16802 USA