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Categorias: Noticias Prensa

Brewers spent grains as alternative to soy for milk cows

The Net Energy of lactation (ENl) value ranges from 1386 to 1434 Kcal / Kg MS at 1530-1673 Kcal / Kg MS and reaches up to 1888 Kcal / Kg MS. This variability translates into a very different economic interest compared to other raw materials, depending on the value considered.
Usually it is recommended to use up to 20/25% in the feed and up to 10/15% in the total MS of the diet. However in practice up to 30/40% has been reached without the production of milk being affected. No different responses have been observed when providing wet or dry bagasse.
When the use of bagasse and soybean in dairy cattle has been compared, the results have been favorable to bagasse in many cases. The same conclusion comes to Polan et al. With better results with bagasse, while showing an increase in intake, a decrease of ammoniacal nitrogen in the rumen and, although the dry bagasse N digestibility was lower than that of soybean, they conclude that it is used in metabolism In a more efficient way as evidenced by the higher production of milk with dried bagasse.
Bagasse is also an excellent source of fiber for ruminants and has a very positive effect on chewing time, which is higher (56.6 min / Kg / MS) than for other fibrous raw materials such as beet pulp (32.3 min / kg DM) This effect is beneficial to recycle buffer substances in the saliva and contribute to minimize the risk of acidosis. The NRC (2000) gives an effective fiber value (ENDF) of 66% of the NDF content.
Belibasakis and Tsirgogianni find that the use of bagasse up to 45%, compared to maize silo, increases milk production, total milk solids content and fat content. They point out that the reason for this response may be the non-degradable protein content and the amino acid composition of the bagasse. Dhiman et al. Observe that the use of bagasse does not influence the intake of DM, corrected fat content and milk composition. The ruminal parameters were also not affected: VFA content, molar ratio between VFA, NH3, and pH.
In short, bagasse is a good source of alternative protein to soy for use in milk cows.