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Effect of seasonal conditions on fleece weight and its components in merino sheep grazing Mitchell grass pasture in North West Queensland

Pepper, P.M. and Rose, M. and McKeon, G.M. (1998) Effect of seasonal conditions on fleece weight and its components in merino sheep grazing Mitchell grass pasture in North West Queensland. In: Animal Production in Australia: The Australian Society of Animal Production. Twenty-second Biennial Conference.

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Publisher URL: http://www.asap.asn.au/index.php

Abstract

SUMMARY
Seasonal conditions in the pre to post natal period and selected periods before and during wool growth were described using climatic measures and estimates of the quality and quantity of pasture on offer derived from a validated pasture production model (GRASP). The variation in greasy and clean fleece weight, yield, staple length, fibre diameter, neck and side wrinkle score of Merinos grazing Mitchell grass in north west Queensland was explained in terms of these pasture and climatic measures and animal characteristics such as reproductive status, age and skin area. Multiple regression equations predicting clean and greasy fleece weight from the proportion of days in the wool growth period that the green pool in the pasture was less than one kg/ha, the percentage utilisation of the pasture, age, reproductive status and skin area of the ewes explained 87% and 79% of the variation respectively. Equations with similar predictors explained 58-85% of the variation of the other components. The inclusion of pasture conditions in the pre to post natal period did not significantly improve the predictions of the animal’s later performance.

22nd 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:Merinos; Wool; Mitchell grass; Seasonal conditions.
Subjects:Animal culture > Sheep > Wool production
Deposited On:09 Sep 2004
Last Modified:13 Aug 2010 15:08

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