+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Influence of liveweight, liveweight change and diet on wool growth, staple strength, and fibre diameter in young sheep



Influence of liveweight, liveweight change and diet on wool growth, staple strength, and fibre diameter in young sheep



Australian Journal of Agricultural Research 49(2): 269-277



The effects of initial liveweight, liveweight change, and composition of the diet on wool growth and staple strength in weaner sheep were investigated. Weaner wethers (64) were allocated to treatments in a factorial design (23). The factors were initial liveweight (heavy, 33 kg; light, 25 kg), liveweight change (fed at maintenance for 56 days, or 28 days at 0.6Xmaintenance then 28 days at 1.6Xmaintenance), and diet (lupin seed based diet or canola meal based diet). The heavier weaners grew approximately 1.9 g/day more wool than the light sheep during the experimental period and this resulted in a higher clean fleece weight (1.8 v. 1.4 kg), staple strength (37 v. 27.4 N/ktex), and fibre diameter (18.0 v. 17.4 mum). Substituting canola meal for lupin seed increased wool growth during the experiment and clean wool yield, but did not affect clean fleece weight or staple strength. The weaners fed to lose and then gain weight grew wool with a lower staple strength than the weaners fed to maintain weight through the experiment (28.6 v. 35.8 N/ktex), but there were no differences in any of the other fleece characteristics. The ratio of wool growth to dry matter intake (DMI) was higher in the sheep fed canola meal than those fed lupins (by approximately 1.5 g/kg DMI) and higher in weaners losing weight than those fed to maintain weight (by approximately 4.5 g/kg DMI). From a practical perspective, these results indicate that initial liveweight and liveweight change both influence staple strength and wool growth and need to be included in any management strategy to improve wool quality of young sheep.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 008867792

Download citation: RISBibTeXText


Related references

The influence of fluctuation in live weight and supplementation with rumen stable methionine during liveweight loss on the production, fibre diameter and staple strength of wool. Proceedings of the Australian Society of Animal Production 18: 457, 1990

Wool growth and fibre diameter changes in young Merino sheep genetically different in staple strength and fed different levels of nutrition. Australian Journal of Agricultural Research 49(5): 889-898, 1998

Wool and liveweight responses to nutrition by Merino sheep genetically selected for high or low staple strength. Australian Journal of Agricultural Research 48(8): 1129-1137, 1997

Coarser wool is not a necessary consequence of sheep aging: allometric relationship between fibre diameter and fleece-free liveweight of Saxon Merino sheep. Animal 10(12): 2051-2060, 2016

The influence of protein quality on the effect of flavomycin on wool growth liveweight change and rumen fermentation in sheep. Australian Journal of Agricultural Research 41(5): 987-994, 1990

The effects of lupin or oat grain supplements on liveweight change, staple strength and position of break for sheep grazing dry annual pastures. Proceedings of the Australian Society of Animal Production 18: 400-403, 1990

Seasonal variation in fibre diameter and length in wool of grazing Merino sheep with low or high staple strength. Australian Journal of Experimental Agriculture 39(5): 507-517, 1999

The effect of bentonite on wool growth liveweight change and rumen fermentation in sheep. Australian Journal of Experimental Agriculture 30(1): 39-42, 1990

Seasonal pasture production, liveweight change and wool growth of sheep in a Mediterranean environment. Proc. 11th int. Grassld Congr., Surfers Paradise. 873-6. Bibl. 5, 1970

Effects of daily or infrequent supplementation of weaner sheep on liveweight change and wool growth. Proceedings of the Australian Society of Animal Production 16: 207-210, 1986

The effect of haemonchus contortus on liveweight gain and wool growth in young merino sheep. Australian Journal of Agricultural Research 40(2): 419-432, 1989

The impact of live weight and liveweight change on wool staple tenacity in Romney hoggets. Proceedings of the New Zealand Society of Animal Production 60: 171-173, 2000

The effect of polyethylene glycol (PEG) on wool growth and liveweight of sheep consuming a mulga (Acacia aneura) diet. Proceedings of the Australian Society of Animal Production 17: 290-293, 1988

Differences in fibre diameter profile characteristics in wool staples from Merino sheep and their relationship with staple strength between years, environments, and bloodlines. Australian Journal of Agricultural Research 53(4): 481-491, 2002

Effect of crossing Merino with Barki sheep on some wool characteristics. I. Staple and fibre lengths, fibre strength, elongation and clean wool yield. J. Anim. Prod. U.A.R 9: 295-297, 1971