Fava beans can substitute soybean meal and rapeseed meal as protein source in diets for lactating dairy cows
| Autor: | Peter Lund, Torben Larsen, Lars Wiking, Martin Riis Weisbjerg, Nikolaj Peder Hansen, Mogens Larsen, Marianne Johansen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Rapeseed
Rumen field bean Starch Silage Soybean meal Zea mays 03 medical and health sciences chemistry.chemical_compound Animal science Latin square Genetics Animals Lactation Dry matter Lactose 030304 developmental biology 0303 health sciences Meal Brassica napus digestive oral and skin physiology 0402 animal and dairy science food and beverages protein supplement 04 agricultural and veterinary sciences 040201 dairy & animal science Animal Feed Diet Vicia faba chemistry Animal Science and Zoology Cattle Female Soybeans toasting Food Science |
| Zdroj: | Hansen, N P, Johansen, M, Wiking, L, Larsen, M, Lund, P, Larsen, T & Weisbjerg, M R 2021, ' Fava beans can substitute soybean meal and rapeseed meal as protein source in diets for lactating dairy cows ', Journal of Dairy Science, vol. 104, no. 5, pp. 5508-5521 . https://doi.org/10.3168/jds.2020-19577 |
| Popis: | The effect of replacing mixtures of wheat and soybean meal and wheat and rapeseed meal by toasted fava beans, and the effect of toasting fava beans on feed intake, milk yield, and composition of milk and feces were investigated using 40 Holstein cows in each of two 4 × 4 Latin square design trials conducted simultaneously. In trial 1, the 4 treatment concentrates were untreated fava beans, toasted fava beans, 42% soybean meal + 58% rolled wheat, and a 21, 29, and 50% mix of soybean meal, rolled wheat, and toasted fava beans, respectively [on dry matter (DM) basis]. In trial 2, the 4 experimental treatments were untreated fava beans, toasted fava beans, 64% rapeseed meal + 36% rolled wheat, and a 32, 18, and 50% mix of rapeseed meal, rolled wheat, and toasted fava beans, respectively (on DM basis). In each trial, 16 primiparous and 24 multiparous cows were fed the treatment concentrates as part of a partial mixed ration, of which the forage consisted of 50% corn silage and 50% grass-clover silage. Substitution of soybean meal and wheat or rapeseed meal and wheat with toasted fava beans did not affect total DM intake, and no linear effects were observed on milk yield or energy-corrected milk (ECM) yield. However, in trial 2, a quadratic effect was observed on milk yield when substituting rapeseed meal and wheat with toasted fava beans. In both trials, substitution of soybean meal and wheat or rapeseed meal and wheat with toasted fava beans increased milk lactose concentration and decreased milk protein yield and concentration of protein in milk. In both trials, fecal concentration of starch increased linearly when substituting soybean meal and wheat or rapeseed meal and wheat with toasted fava beans. In trial 2, fecal concentration of P decreased when substituting rapeseed meal and wheat with toasted fava beans. In situ investigations showed increased rumen undegradable protein concentration and thereby increased estimated metabolizable protein supply when toasting fava beans. However, in both trials, milk protein yield and concentration decreased when cows were fed toasted compared with untreated fava beans. Furthermore, when cows were fed toasted compared with untreated fava beans in trial 1, milk yield, ECM yield, and nitrogen efficiency decreased. We conclude that toasted fava beans could substitute soybean meal and wheat or rapeseed meal and wheat with regard to ECM yield. However, milk protein yield decreased when substituting soybean meal and wheat or rapeseed meal and wheat with toasted fava beans. Compared with untreated fava beans, toasting had no positive effect on milk production and nitrogen efficiency. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|