Live weight gain, urinary nitrogen excretion and urination behaviour of dairy heifers grazing pasture, chicory and plantain
L Cheng, J Mccormick, AN Hussein, C Logan, D Pacheco, MC Hodge, GR Edwards
JOURNAL OF AGRICULTURAL SCIENCE | CAMBRIDGE UNIV PRESS | Published : 2017
The objective of the present study was to investigate live weight (LW) gain, urinary nitrogen (UN) excretion and urination behaviour of dairy heifers grazing pasture, chicory and plantain in autumn and spring. The study comprised a 35-day autumn trial (with a 7-day acclimation period) and a 28-days spring trial (with a 7-day acclimation period). For each trial, 56 Friesian × Jersey heifers were blocked into five dietary treatments balanced for their LW and breeding worth (i.e. genetic merit of a cow for production and reproduction): 1·00 perennial ryegrass-white clover pasture (PA); 1·00 chicory (CH); 1·00 plantain (PL); 0·50 pasture + 0·50 chicory (PA + CH); and 0·50 pasture + 0·50 plantain..View full abstract
We acknowledge the support of the AGMARDT Postdoctoral Fellowship to author Long Cheng. Thanks go to Helen Hague, David Jack, Daniel Dash, Adam Caldwell, Jeffrey Curtis, Sarah Taylor, Don Hefer, Kurt Engelbrecht, Ao Chen, Omar AlMarashdeh, Racheal Bryant and Alan Marshall from Lincoln University, Clemence Fraslin and Laure Guinot from AgroParisTech, France, Julie Grabot from Bordeaux Sciences Agro, France, Yingluck Moonsan and Preecha Moonsan from Pibulsongkram Rajabhat University, Thailand for pasture preparation, animal sampling and useful discussion.