Increasing linseed supply in dairy cow diets based on hay or corn silage: Effect on enteric methane emission, rumen microbial fermentation, and digestion
Autor: | Christine Martin, Michel Doreau, Pascale Mosoni, Anne Ferlay, Y. Rochette, Yves Chilliard |
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Přispěvatelé: | Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut National de la Recherche Agronomique (INRA)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Unité de Microbiologie (MIC), Institut National de la Recherche Agronomique (INRA), French National Research Agency under the 'Programme National de Recherche en Alimentation et Nutrition Humaine' ANR-05-PNRA-017-04, Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement |
Rok vydání: | 2016 |
Předmět: |
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences
0301 basic medicine Rumen Silage Forage digestion Zea mays 03 medical and health sciences Fodder Latin square Flax Genetics Animals hay or corn silage Dry matter Food science 2. Zero hunger Dose-Response Relationship Drug Chemistry dairy cow methane 0402 animal and dairy science food and beverages 04 agricultural and veterinary sciences 040201 dairy & animal science Diet Gastrointestinal Microbiome 030104 developmental biology Dietary Supplements Fermentation Hay Animal Nutritional Physiological Phenomena Cattle Female Animal Science and Zoology linseed Digestion Food Science |
Zdroj: | Journal of Dairy Science Journal of Dairy Science, American Dairy Science Association, 2016, 99 (5), pp.3445-3456. ⟨10.3168/jds.2015-10110⟩ |
ISSN: | 0022-0302 |
Popis: | International audience; We investigated the effects of increasing extruded linseed supply in diets based on hay (H; experiment 1) or corn silage (CS; experiment 2) on enteric methane (CH4) emission, rumen microbial and fermentation parameters, and rumen and total-tract digestibility. In each experiment, 4 lactating Holstein cows fitted with cannulas at the rumen and proximal duodenum were used in a 4 x 4 Latin square design (28-d periods). Cows were fed ad libitum a diet [50:50 and 60:40 forage:concentrate on a dry matter (DM) basis for experiments 1 and 2, respectively] without supplementation (H0, CS0) or supplemented with extruded linseed at 5% (H5, CS5), 10% (H10, CS10), and 15% (H15, CS15) of dietary DM (i.e., 1.8, 3.6 and 5.4% total fatty acids added, respectively). All measurements were carried out during the last 8 d of each period. Linseed supply linearly decreased daily CH4 emission in cows fed H diets (from 486 to 289 g/d for H0 to H15, on average) and CS diets (from 354 to 207 g/d for CS0 to CS15, on average). The average decrease in CH4 per kilogram of DM intake was, respectively, 7, 15, and 38% for H5, H10, H15 compared with the H0 diet, and 4, 8, and -34% for CS5, CS10, and CS15 compared with the CS0 diet. The same dose-response effect was observed on CH4 emission in percent of gross energy intake, per kilogram of nutrient digested, and per kilogram of 4% fat- and 3.3% protein-corrected milk (FPCM) in both experiments. Changes in the composition of rumen volatile fatty acids in response to increasing linseed supply resulted in a moderate or marked linear decrease in acetate:propionate ratio for H or CS diets, respectively. The depressive effect of linseed on total protozoa concentration was linear for H diets (-15 to -40%, on average, for H5 to H15 compared with H0) and quadratic for CS diets (-17 to -83%, on average, for CS5 to CS15 compared with CS0). Concentration of methanogens was similar among H or CS diets. The energetic benefits from the decreased CH4 emission with linseed supply in diets based on hay or corn silage did not improve digestibility or milk yield. Milk efficiency (kg of FPCM/kg of DM intake) was improved with linseed supply up to H10 in H diets and was unchanged in CS diets. Lower CH4 enteric emission from dairy cows fed linseed helps limit the environmental footprint of ruminant livestock. |
Databáze: | OpenAIRE |
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