University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Karin Weigel
(2008):
Experimentelle Untersuchungen zum Einsatz von getrockneter Weizenschlempe und geschütztem Rapsextraktionsschrot.
Master / Diploma Thesis,
BOKU-Universität für Bodenkultur,
pp 83.
UB BOKU
obvsg
FullText
- Abstract:
- The present study compared the effects of distillers dried grains with solubles (DDGS, product: Starprot®), rumen protected rape seed extracts (RES, product: RaPass®) and soy bean extracts (SES) on feed intake, milk yield and milk composition of dairy cows. For this purpose 72 cows were assigned to three groups based on milk yield, number of lactation and days in milk. The trial consisted in 2 replicates processing 36 cows with each a pre-period (2 weeks), an experimental period (4 weeks), a post-treatment period (2 weeks) and a 2 weeks interval without treatment between the two replicates. All cows were given a total mixed ration based mainly on maize and grass silage. During the pre-period and the post-treatment period all cows were offered uniformly a concentrate containing all three protein sources at equal amounts (20.1% crude protein (CP)). During the experimental period the cows of the respective treatment groups were offered concentrates containing exclusively one of the protein sources under question (each 16.5% total CP and 7.1MJ NEL/kg). The following parameters were recorded: crude nutrient contents of feeds, feed intake, supply with energy, CP, nXP and non-degradable CP, milk performance (yield, milk fat, milk protein, lactose, non-fat solids), milk urea concentration, milk cell count, and milk pH. None of the parameters analyzed were affected by the different protein sources in the concentrates except for an increase in milk urea content through SES at the end of the experimental period. It is concluded that soy bean extracts may be replaced by DDGS and/or rumen protected rape seed extracts under feeding conditions of the present study without negative impact on performance.
- Beurteilende(r): Windisch Wilhelm Matthias