Effects of replacing corn silage with barley silage on performance of high-producing ‎Holstein cows ‎

Document Type : Research Paper

Authors

1 Ph.D. Candidate, Department of Animal Science, College of Agriculture and ‎Natural Resources, University of Tehran, Karaj, Iran

2 Professor, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

3 Associate Professor, Department of Animal Science, College of Agriculture and Natural Resources, ‎University of Tehran, Karaj, Iran

4 Assistant Professor, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

Abstract

The objective of this study was to determine the effects of the replacement of corn silage with barley silage on high producing dairy cow performance. Thirty six high-producing (57.3±3.9kg/d) dairy cow in mid-lactation (93±7 DIM) were assigned to one of three experimental treatments including (1) no barley silage (BS) and 30% corn silage (CS), (2) 10% BS and 20% CS, and (3) 20% BS and 10 % CS in the TMR over two 24-day periods. The results showed that replacement of corn silage with barley silage linearly increased fat corrected milk (FCM; P=0.04), fat yield (P=0.04) and fat corrected milk production efficiency (P=0.01). There was also a tendency for linear increase in milk fat percentage (P=0.08), and linear decrease in milk lactose percentage (P=0.05). Ruminal acetate proportion and pH increased with increasing barley silage and propionate proportion decreased. Increasing barley silage resulted in linear increase in dry matter, organic matter and neutral detergent fiber digestibility (NDF; P<0.05). This study showed that replacing corn silage with barley silage could be considered as a successful strategy to improve performance and forage provisions of high-producing dairy cows.

Keywords

References

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Iranian Journal of animal Science
Volume 51, Issue 3
December 2020
Pages 173-181

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History

  • Receive Date: 15 October 2019
  • Revise Date: 09 June 2020
  • Accept Date: 19 July 2020

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