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Effects of silage additives on intake, live-weight gain and carcass traits of growing and finishing dairy bulls fed pre-wilted grass silage and barley grain-based ration

Published online by Cambridge University Press:  24 July 2017

A. HUUSKONEN*
Affiliation:
Natural Resources Institute Finland (Luke), Green Technology, Tutkimusasemantie 15, FI-92400 Ruukki, Finland
A. SEPPÄLÄ
Affiliation:
Natural Resources Institute Finland (Luke), Green Technology, Humppilantie 14, FI-31600 Jokioinen, Finland
M. RINNE
Affiliation:
Natural Resources Institute Finland (Luke), Green Technology, Humppilantie 14, FI-31600 Jokioinen, Finland
*
*To whom all correspondence should be addressed. Email: arto.huuskonen@luke.fi

Summary

The effects of silage additives on performance of dairy bulls were determined in a feeding trial using 45 Nordic Red and 45 Holstein bulls. Both breeds were allotted randomly to three treatments: (1) timothy silage (TS) without additives + barley (CON); (2) TS with sodium benzoate, potassium sorbate and sodium nitrate-based additive + barley (SALT); and (3) TS with a mixture of mostly formic acid and propionic acid-based additive + barley (ACID). The bulls were fed total mixed rations ad libitum. During the experimental period of 259 days, the average dry matter intake was 10·1 kg/d and there was no difference among the treatments. The average live-weight gain (LWG) and carcass gain was 1363 and 741 g/d, respectively. There were no treatment differences in the carcass gain but LWG of the CON bulls was 5% higher compared with the SALT and ACID bulls. Carcass conformation score of the SALT and ACID bulls was 6% higher compared with the CON bulls. The experiment demonstrated that there was only a slight benefit from silage additives in animal performance when silage dry matter was 350–400 g/kg and silage was ensiled in round bales.

Type
Animal Research Papers
Copyright
Copyright © Cambridge University Press 2017 

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Footnotes

Current address: Eastman Chemical Company, Typpitie 1, FI-90620 Oulu, Finland

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