Journal article

Effects of herbage mass and herbage allowance on bite mass of grazing dairy cows

PS Alvarez-Hess, ML Douglas, MM Wright, N Norbu, K Giri, WJ Wales, JL Jacobs, MJ Auldist

ANIMAL FEED SCIENCE AND TECHNOLOGY | ELSEVIER | Published : 2021

Abstract

Dry matter intake (DMI) of herbage is a product of bite rate and bite mass and is a determinant of the performance of grazing ruminants. This research tested the effect of herbage allowance and herbage mass on average bite mass of individual dairy cows grazing perennial ryegrass herbage (Lolium perenne L.). Two experiments were conducted, one in each of winter (Experiment 1) and spring (Experiment 2). In each experiment, 24 Holstein-Friesian dairy cows grazed individual perennial ryegrass plots over 10 d. In each experiment cows grazed one of six treatments: low or medium herbage mass (1900 or 2200 kg DM.ha−1 in Experiment 1 and 2200 or 3000 kg DM.ha−1 in Experiment 2) combined with either l..

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