Acta Univ. Agric. Silvic. Mendelianae Brun. 2016, 64, 901-909

https://doi.org/10.11118/actaun201664030901
Published online 2016-07-04

Comparison of Maize Silage-based Diets for Dairy Cows Containing Extruded Rapeseed Cake or Extruded Full-fat Soybean as Major Protein Sources

Jiří Třináctý, Michal Richter, Ludmila Křížová

Department of Animal Nutrition and Quality of Livestock Products, Agriresearch Rapotín Ltd., Vídeňská 699, 691 23 Pohořelice, Czech Republic

The trial was carried out on four Holstein cows with initial milk yield of 27.3 ± 1.7 kg.day−1. Cows were divided into two groups – the first was fed a diet based on extruded rapeseed cake (D-ERC), the second one was fed a diet based on extruded full-fat soybean (D-EFFS), both diets contained maize silage and meadow hay. The experiment was divided into 4 periods of 42 days. Intake of dry matter, crude protein and NEL was not affected by the treatment (P > 0.05) while the intake of PDIA, PDIN and PDIE was lower in D-ERC than in D-EFFS (P < 0.05). Milk yield in D-ERC (22.6 kg.d−1) was lower than in D-EFFS (24.7 kg.d−1, P < 0.001) while concentration of milk fat and protein were reverse (P < 0.05). Smaller portion of essential AADI in crude protein intake (CPI) in D-ERC resulted in lower efficiency of CPI utilization for milk protein synthesis in comparison to D-EFFS being 313 and 327 g.kg−1, respectively (P < 0.01). Concentration of AA in blood plasma was not affected by the type of diet except of His and Ile that were higher in D-EFFS (P < 0.01).

Funding

This paper was supported by the institutional support for the long-term conceptual development of the research organization, Ministry of Agriculture, Decision No. RO1215 from 26th February 2015.

References

32 live references