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Influence of nitrogen based supplements on live weight, fertility and mortality of heifers grazing dry season native pasture

Taylor, W.J. and Holroyd, R.G. and Rebgetz, J.G. (1982) Influence of nitrogen based supplements on live weight, fertility and mortality of heifers grazing dry season native pasture. In: Animal Production in Australia: The Australian Society of Animal Production. Fourteenth Biennial Conference.

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Abstract

Supplements containing urea or biuret were fed in the dry season to yearling and two year old pregnant heifers grazing native spear grass pastures in north Queensland. Liveweight change and survival during the dry season and fertility in the following year were measured.

In the first experiment during a relatively favourable dry season, supplementation significantly (P<0.01) reduced liveweight loss in yearling heifers (5 vs. 32 kg). In the following year during a drought, supplement significantly (P<.01) reduced liveweight loss in yearling heifers (32 vs. 41 kg) and significantly (P <0.01) reduced mortalities (23.5% vs. 5.2%) in pregnant and lactating heifers. The supplement had no significant effect on subsequent fertility in either experiment.

14th Biennial Conference.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Reproduced with permission Australian Society of Animal Production [ASAP]. © Australian Society of Animal Production, ASAP.
Keywords:Liveweight; Fertility; Heifers; Native pastures; Supplements; Dry season.
Subjects:Animal culture > Cattle > Meat production
Animal culture > Feeds and feeding. Animal nutrition
Deposited On:23 Jan 2006
Last Modified:13 Aug 2010 15:08

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