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The effect of grazing residual control methods on cow intake and milk production in late spring


Irvine, LD and Freeman, MJ and Rawnsley, RP, The effect of grazing residual control methods on cow intake and milk production in late spring, Proceedings of the 4th Australasian Dairy Science Symposium, 31 August - 2 September 2010, Lincoln, New Zealand, pp. 195-198. ISBN 9780864762306 (2010) [Refereed Conference Paper]

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Mowing of pasture before grazing, topping of pasture after grazing, and regrazing of pasture were studied as methods to control post-grazing residuals at optimum levels for pasture quality and growth. The study was conducted over a 14-day period during November 2009 and the impact of each of these methods of residual control on cow intake and milk production was measured. Cows were split into eight herds of 15 cows and allocated to one of four treatments with two replicates. Compared to the control, topping pasture pre-grazing reduced (P < 0.01) cow intake by 2.3 kg DM/cow/day, milk yield by 2.9 L/cow/day (P < 0.05) and milk protein percent (P < 0.05). The pasture that was mown before grazing was significantly (P < 0.05) higher in neutral detergent fibre and significantly (P < 0.05) lower in metabolisable energy, than all other treatments. This study has indicated that pre-graze topping as a method of maintaining low pasture residuals during spring reduces milk production and cow intake.

Item Details

Item Type:Refereed Conference Paper
Keywords:cow intake; dairy cow; grazing residual; milk yield; topping
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture production not elsewhere classified
Objective Division:Animal Production and Animal Primary Products
Objective Group:Pasture, browse and fodder crops
Objective Field:Sown pastures (excl. lucerne)
UTAS Author:Irvine, LD (Ms Lesley Irvine)
UTAS Author:Freeman, MJ (Mr Mark Freeman)
UTAS Author:Rawnsley, RP (Dr Richard Rawnsley)
ID Code:64766
Year Published:2010
Deposited By:Agricultural Science
Deposited On:2010-08-24
Last Modified:2012-03-20
Downloads:13 View Download Statistics

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