Short communication: Partial replacement of ground corn with algae meal in a dairy cow diet: Milk yield and composition, nutrient digestibility, and metabolic profile
| Autor: | Esther J. Yu, Caio Seiti Takiya, G.G. da Silva, E. Ferreira de Jesus, T. H. da Silva, Francisco Palma Rennó, Thiago Henrique Annibale Vendramini, T.A. Del Valle |
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| Předmět: |
0301 basic medicine
Rumen Zea mays 03 medical and health sciences chemistry.chemical_compound Algae Genetics Animals Lactation Dry matter Food science Meal biology 0402 animal and dairy science Coproduct food and beverages 04 agricultural and veterinary sciences biology.organism_classification Animal Feed 040201 dairy & animal science Diet Neutral Detergent Fiber Milk 030104 developmental biology chemistry Metabolome Urea Cattle Digestion Female Animal Science and Zoology Composition (visual arts) Energy source Food Science |
| Zdroj: | ResearcherID |
| Popis: | This study was undertaken to evaluate the effects of partially replacing dietary ground corn with a microalgae meal from Prototheca moriformis (composed of deoiled microalgae and soyhulls) on milk yield and composition, nutrient intake, total-tract apparent digestibility, and blood profile of lactating dairy cows. Twenty multiparous Holstein cows (57.7±49.4d in milk, 25.3±5.3 of milk yield, and 590±71kg of live weight at the start of experiment, mean ± standard deviation) were used in a cross-over design experiment, with 21-d periods. Diets were no microalgae meal (CON) or 91.8g/kg of microalgae meal partially replacing dietary ground corn (ALG). Cows showed similar milk yield and composition. The 3.5% fat-corrected milk production was 30.2±1.34kg/d for CON and 31.1±1.42kg/d for ALG. Despite cows having similar dry matter intake, ALG increased neutral detergent fiber and ether extract intake. In addition, cows fed ALG exhibited higher ether extract digestibility. No differences were detected in glucose, urea, amino-aspartate transferase, and gamma-glutamyl transferase blood concentrations. Feeding ALG increased the total cholesterol and high-density lipoprotein in blood compared with CON. The microalgae meal may partially replace ground corn in diets of lactating cows without impairing the animal's performance. |
| Databáze: | OpenAIRE |
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