- Changes in wool production and fibre thickness during mass changes of sheep
|Last update: April 2, 2012 02:49:13 PM|
CHANGES IN WOOL PRODUCTION AND FIBRE THICKNESS DURING MASS CHANGES OF SHEEP
G. A. JACOBS en P. J. DE WET
Sheep losing different quantities of mass with subsequent realimentation all had the same final wool production under the conditions of this experiment. The wool production of sheep which reached 93, 85, 80, 70 and 65 % of their initial body mass of approximately 46 kg in 16 weeks were respectively 100, 83, 84, 60 and 59 % of that of the control group on 88 % of maintenance feeding. The wool production of sheep maintained for 16 weeks at minimum mass levels of 80, 73 and 61 % of their initial mass, were respectively 74, 66 and 57 % of that of the control group on 112 % of maintenance feeding at 46 kg live mass. When fibre thickness and accompanying wool production is in question, a feeding treatment could be mare accurately described by mentioning intake as well as feeding level (intake per unit of metabolic size). With maintenance feeding on a mass level lower than representative of a reasonable condition, the mean loss of wool production, after reaching equalibrium with a low feeding level, was 6,1 ± 7,0a percentage units higher than the loss of live mass, irrespective of the degree of mass loss.