Effect of feeding long or short wheat hay v. wheat silage in the ration of lactating cows on intake, milk production and digestibility

Animal : an International Journal of Animal Bioscience
Yoav ShaaniJ Miron

Abstract

The objective of this study was to evaluate in lactating cows the effect of either chopping or ensiling of wheat roughage on: intake, digestibility, lactation performance and animal behavior. Three groups of 14 lactating cows each, were fed total mixed rations (TMRs) based on either long wheat hay (HL), short wheat hay (HS) or wheat silage (SI), as the sole roughage source (30% of TMR dry matter (DM)). Parameters examined: sorting behavior, DM intake, milk yield and composition, rumination, recumbence, average daily rumen pH, digesta passage rate, and in-vivo digestibility. Performance data was summarized by day and analyzed using a proc-mixed model. The content of physically effective neutral detergent fiber (peNDF) was similar in the HL and SI and lower in the HS, resulting in similar differences among the three corresponding TMRs. In vitro DM digestibility of wheat silage was higher than that of the two hays (65.6% v. 62.8%) resulting in higher in vitro DM digestibility of the SI-TMR compared with the hay-based TMRs (79.3 v. 77.0%). HS-TMR was better than HL- or SI-TMRs at preventing feed sorting by cows after 12 or 24 h eating of the diets. Cows fed HS-TMR consumed more DM and NDF but less peNDF than the other two groups. A...Continue Reading

References

May 1, 1996·Journal of Dairy Science·B P LammersA J Heinrichs
Feb 24, 2001·Journal of Dairy Science·I Strandén, M Lidauer
Jun 22, 2001·Journal of Dairy Science·J MironM Morrison
Mar 22, 2003·Journal of Dairy Science·C Leonardi, L E Armentano
Jun 16, 2005·Journal of Dairy Science·M DrisslerD M Weary
Aug 21, 2010·Archives of Animal Nutrition·Qendrim ZebeliWinfried Drochner

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