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Yunta Bernal, Cristina, 2010. Methane production of dairy cows fed cereals with or without protein supplement and high quality silage. Second cycle, A2E. Uppsala: SLU, Dept. of Animal Nutrition and Management



Ruminants produce methane during the fermentation of feed in the rumen. This release of methane represents not only an energetic loss for the animal but also contributes to the global warming because methane is released to the atmosphere. To mitigate the methane production from ruminants, and in particular from cows, feeding strategies need to be studied. The objective of the thesis was to evaluate the quantity of methane produced in diets with or without protein concentrate combined with two silages differing in protein content (17% vs. 13%). An experiment using a Latin squares design with six Swedish Red cows in two orthogonal blocks was performed to study three different treatments: treatment AC with silage A (2/3 early harvested silage + 1/3 red clover) and cereal, treatment AP with silage A, cereal and protein supplement and treatment BC with silage B and cereal. Each period lasted three weeks with two weeks adaptation to the diet and last week as a measurement period. There were no differences in methane production in absolute terms between treatments, and the average methane production of the cows was 473 g/d. Milk production and methane production per kg milk did not differ between treatments. Significant differences were found only between treatments AP and BC in methane production per kg of protein intake (104.7 g/kg vs. 203.3), per kg of MJ intake (1.6 g/kg vs. 2.0) and per kg of starch intake (492.1 g/kg vs. 228.5).

Main title:Methane production of dairy cows fed cereals with or without protein supplement and high quality silage
Authors:Yunta Bernal, Cristina
Supervisor:Danielsson, Rebecca and Spörndly, Eva
Examiner:Bertilsson, Jan
Series:Examensarbete / Sveriges lantbruksuniversitet, Institutionen för husdjurens utfodring och vård
Volume/Sequential designation:317
Year of Publication:2010
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:HVEMP Master of Science Programme in Animal Science 240 HEC
Supervising department:(VH) > Dept. of Animal Nutrition and Management
Keywords:Methane, dairy cows, cereal concentrate, Protein Supplement, silage
Permanent URL:
Subject. Use of subject categories until 2023-04-30.:Animal feeding
Animal physiology - Nutrition
Deposited On:24 Sep 2010 10:44
Metadata Last Modified:06 Oct 2012 14:09

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