Frequent allocation of rotationally grazed dairy cows changes grazing behavior and improves productivity

Journal of Dairy Science
P A AbrahamseS Tamminga

Abstract

Twenty Holstein cows were blocked in 2 groups according to milk yield to evaluate the effect of frequency of allocation to new grazing plots on pasture intake, grazing behavior, rumen characteristics, and milk yield. The 2 treatments, daily allocation to 0.125-ha plots (1D) or allocation every 4 d to 0.5-ha plots (4D) of Lolium perenne L., were tested in a randomized block design (2 rotations with 3 or 4 measuring periods of 4 d each) with mixed model analysis accounting for repeated measures. There were no differences in the chemical composition of offered pasture and in pasture dry matter intake (DMI) between 1D and 4D. However, an interaction between treatment and rotation indicated a difference in pasture DMI between treatments during the first rotation (4D, 16.5 vs. 1D, 18.3 kg/d) but not during the second rotation (4D, 15.0 vs. 1D, 14.7 kg/d), possibly a result of a greater pasture mass in the first rotation. Grazing time (average 562 min/d) and ruminating time (average 468 min/d), observed using IGER graze recorders, were similar between treatments, but grazing time increased numerically (549 to 568 min/d), and ruminating time decreased linearly (471 to 450 min/d) within periods in the 4D treatment. Mean rumen pH (6.16 v...Continue Reading

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Citations

Oct 21, 2015·Animals : an Open Access Journal From MDPI·Shirley KuhnenLuiz Carlos Pinheiro Machado Filho
Aug 13, 2015·Animal : an International Journal of Animal Bioscience·D WarnerA Bannink
Dec 9, 2014·Animal : an International Journal of Animal Bioscience·M CoppaA Ferlay
Jul 27, 2011·Journal of Dairy Science·S M van ZijderveldH B Perdok
Aug 5, 2010·The Proceedings of the Nutrition Society·Alison H Kingston-SmithMichael Abberton
Jan 25, 2012·Tropical Animal Health and Production·Madodana S Dodzi, Voster Muchenje
May 19, 2018·Animals : an Open Access Journal From MDPI·Alberto RomanzinStefano Bovolenta
Nov 26, 2020·Animals : an Open Access Journal From MDPI·Jessica G PollockDeborah A McConnell

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