Effect of lambing policy and ewe breed cross on wool growth patterns and wool quality

Morris, S. T.; McCutcheon, S. N.; Blair, Hugh T.; Parker, W. J.

doi:10.1080/00288233.1994.9513042

Cited by 3 publications

(4 citation statements)

References 14 publications

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“…August-lambing ewes exhibited a more marked variation in wool growth rate during the experimental period than did May-lambing ewes. This is consistent with previous reports that autumnlambing ewes have a more even pattern of wool growth rate (and fibre diameter) than springlambing ewes (Reid et al 1988;Morris et al 1994a). Similarly, the fact that August-born lambs were heavier at birth and at weaning than May-born lambs is consistent with the results of previous studies showing an effect of seasonal lambing policy on lamb birth weights and growth rates to weaning (Reid et al 1988;Obst et al 1991;Morris et al 1993 a,b).…”

Section: Lambing Policysupporting

confidence: 93%

“…Reid et al (1988) measured greater wool production in autumn-lambing than in spring-lambing ewes during all periods of the year except in September and October when springlambing ewes had a greater wool growth rate. Morris et al (1994a) also reported a greater wool growth rate in spring-lambing ewes compared with winter-lambing ewes during P140-L77 (1.19 versus 0.91 mg/cm 2 per day).…”

Section: Lambing Policymentioning

confidence: 78%

“…Because autumn-lambing ewes would normally be exposed to better weather conditions and feed supply at pre-lamb shearing, the disadvantages advanced for pre-lamb shearing are likely to be less marked. Furthermore autumn-lambing ewes have less variation in fibre diameter through the season (Morris et al 1994a) and are therefore less likely to experience a winter thinning of the wool fibre and an associated break in the wool. We hypothesise, therefore, that the effects of pre-lamb shearing will have more positive effects on wool growth in May-than in August-lambing ewes.…”

Section: Introductionmentioning

confidence: 99%

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Effects of pre‐lamb shearing on feed intake and associated productivity of May‐ and August‐lambing ewes

Dabiri

Morris

Wallentine

et al. 1996

New Zealand Journal of Agricultural Research

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The effects of pre-lamb shearing on feed intake and wool/lamb production of May (autumn)-and August (spring)-lambing ewes were examined. Mixed age Border Leicester x Romney ewes mated to lamb in May or August (60 ewes/ lambing policy) were divided at random into two groups (balanced for pregnancy status and liveweight). One group was shorn on Day 118 of pregnancy (P118) and the second group left unshorn. Measurement of pasture intake was carried out over three periods before lambing (P113-117, P119-130, and P141-144) and three periods after lambing (L (lactation day) 8-11, L21-25, and L29-33) using intraruminal chromic oxide controlled release capsules. Intake of ewes was not affected by shearing treatment during pregnancy or lactation except during P141-144 when organic matter intake was significantly greater for shorn ewes than for A95032

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Section: Lambing Policysupporting

confidence: 93%

Section: Lambing Policymentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

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Effects of pre‐lamb shearing on feed intake and associated productivity of May‐ and August‐lambing ewes

Dabiri

Morris

Wallentine

et al. 1996

New Zealand Journal of Agricultural Research

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“…Clean yield also varies within sheep flock due to varying amounts of wax and contaminants such as vegetable matter and dirt (Cottle and Baxter, 2015). A similar study conducted in New Zealand found that clean scoured yield proved to be higher for ewes rearing singles as compared to those rearing twins at both shearing's (Morris et al, 1994). The current results indicate that clean yield plays a significant role in the determination of wool price for White wool and Merino wool, all combined.…”

Section: 63supporting

confidence: 54%

An analysis of the wool characteristics that determine wool price in South Africa

Zenda,

Malan,

Geyer

2023

RJTA

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Purpose South Africa’s wool industry plays an important role in the agricultural sector. The wool industry provides a valuable source of income for farmers who practice sustainable farming practices. However, wool farmers face numerous challenges, such as wool contamination, dirty wool and producing good-quality wool. Good-quality wool is determined by fibre diameter, clean yield, vegetable matter and staple length. This study aims to address these challenges. Design/methodology/approach A multiple regression analysis of price (R/kg) of White wool and Merino wool was applied to four variables fibre diameter: vegetable matter, clean yield and staple length. The analysis was based on the data for the 2009–2019 data from Cape Wools auctions. Findings Fibre diameter, clean yield and staple length, with exception of vegetable matter, made a statistically significant contribution to the determination of wool price after all other independent variables were controlled for (p < 0.05). A one-unit (micron) increase in fibre diameter resulted in a 0.404-unit decrease in wool price (R/kg). A one-unit (mm) increase in staple length resulted in a 0.022-unit increase in wool price (R/kg). There was no statistically significant association between vegetable matter and wool price. A one-unit increase in clean yield was associated with a 0.111-unit increase in wool price (R/kg). Research limitations/implications Since wool fleeces consist of the largest portion of wool shorn from sheep, it is important for wool farmers to focus on wool with low fibre diameter, high clean yield percentage, low percentage of vegetable matter content and good length of the wool. Practical implications Since wool fleeces consist of the largest portion of wool shorn from sheep, it is important for wool farmers to focus on wool with low fibre diameter, high clean yield percentage, low percentage of vegetable matter content and good length of the wool. Social implications In a developing country such as South Africa, this study is important for the following reason. It is understanding the wool characteristics that have the most significance influence on the determination of wool price for Merino wool and White wool might effectively help the wool farmers to adapt their production systems to improve the wool characteristics that determine wool price. Originality/value This study identified a need for a study to be conducted on all wool classes.

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A Profile of New Zealand Crossbred Wool Clip in Both Greasy and Scoured Forms in the 2017-18, 2018-19, and 2019-20 Seasons

Baxter¹,

Wear²

2021

Journal of Natural Fibers

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Effect of lambing policy and ewe breed cross on wool growth patterns and wool quality

Abstract: The effects of lambing policy (June-or August-lambing) and ewe breed cross on midside patch wool growth and wool quality traits were studied for 12 months.

Cited by 3 publications

References 14 publications

Effects of pre‐lamb shearing on feed intake and associated productivity of May‐ and August‐lambing ewes

Effects of pre‐lamb shearing on feed intake and associated productivity of May‐ and August‐lambing ewes

An analysis of the wool characteristics that determine wool price in South Africa

A Profile of New Zealand Crossbred Wool Clip in Both Greasy and Scoured Forms in the 2017-18, 2018-19, and 2019-20 Seasons

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