Effect of maturity and hybrid on ruminal and intestinal digestion of corn silage in dry cows
| Autor: | A. Le Morvan, J. Peyrat, René Baumont, Pierre Nozière |
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| Přispěvatelé: | Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), 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, Station Expérimentale de la Jaillière, ARVALIS - Institut du végétal [Paris], French Seed Companies Union, French National Federation of Sorghum and Maize Seed Producers, French national tech research agency (ANRT), Arvalis-Institut du Vegetal (La Chapelle St-Sauveur, France), 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 |
| Rok vydání: | 2016 |
| Předmět: |
Dietary Fiber
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences corn silage Rumen Silage Starch Protein digestion Biology Zea mays ruminal digestion chemistry.chemical_compound Animal science Latin square Genetics Animals Intestinal Mucosa 2. Zero hunger Maturity (geology) chemistry.chemical_classification neutral detergent fiber starch 0402 animal and dairy science food and beverages 04 agricultural and veterinary sciences Hydrogen-Ion Concentration Fatty Acids Volatile 040201 dairy & animal science Neutral Detergent Fiber Agronomy chemistry Fermentation 040103 agronomy & agriculture Propionate 0401 agriculture forestry and fisheries Cattle Digestion Female Animal Science and Zoology [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition Food Science |
| Zdroj: | Journal of Dairy Science Journal of Dairy Science, American Dairy Science Association, 2016, 99 (1), pp.258-268. ⟨10.3168/jds.2015-9466⟩ |
| ISSN: | 0022-0302 |
| Popis: | International audience; The aim of this study was to evaluate the effect of stage of maturity at harvest on extent of starch, neutral detergent fiber (NDF), and protein digestion, and rumen fermentation in dry cows fed whole-plant corn silage from different hybrids. Four nonlactating Holstein cows cannulated at the rumen and proximal duodenum were fed 4 corn silages differing in hybrid (flint vs. flint-dent) and maturity stage (early vs. late) in a 4 x 4 Latin square design. From early to late maturity, starch content increased (from 234.5 to 348.5 g/kg), whereas total-tract (99.7 to 94.5%) and ruminal starch digestibility (91.3 to 86.5%) decreased significantly. The decrease in ruminal starch digestibility with increasing maturity was similar between hybrids. No effects were found of maturity, hybrid, or maturity x hybrid interaction on total-tract NDF digestibility, ruminal NDF digestibility, true digestibility of N and organic matter in the rumen, or microbial synthesis. Harvesting at later maturity led to increased ruminal ammonia, total volatile fatty acid concentrations, and acetate/propionate ratio but not pH. This study concludes that delaying date of harvest modifies the proportions of digestible starch and NDF supplied to cattle. Adjusting date of corn harvest to modulate amount of rumendigested starch could be used as a strategy to control nutrient delivery to ruminants. |
| Databáze: | OpenAIRE |
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