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Effects of anthelmintic treatment on ewe feed intake, digestion, milk production and lamb growth

Published online by Cambridge University Press:  22 September 2016

R. Z. ZHONG ,
L. CHENG ,
Y. Q. WANG ,
X. Z. SUN ,
D. W. LUO ,
Y. FANG ,
R. D. BUSH  and
D. W. ZHOU
R. Z. ZHONG
Affiliation:
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, People's Republic of China
L. CHENG*
Affiliation:
Faculty of Agriculture and Life Sciences, Lincoln University, PO Box 85084, New Zealand
Y. Q. WANG
Affiliation:
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, People's Republic of China
X. Z. SUN
Affiliation:
Grassland Research Centre, AgResearch Limited, Private Bag 11008, Palmerston North 4442, New Zealand
D. W. LUO
Affiliation:
Grassland Research Centre, AgResearch Limited, Private Bag 11008, Palmerston North 4442, New Zealand
Y. FANG
Affiliation:
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, People's Republic of China
R. D. BUSH
Affiliation:
The University of Sydney, Faculty of Veterinary Science, 425 Werombi Road, Camden, NSW 2570, Australia
D. W. ZHOU*
Affiliation:
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, People's Republic of China
*
*To whom all correspondence should be addressed. Email: paul.cheng@lincoln.ac.nz and zhoudaowei@iga.ac.cn
*To whom all correspondence should be addressed. Email: paul.cheng@lincoln.ac.nz and zhoudaowei@iga.ac.cn
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Summary

Twenty Small Tailed Han (STH) and 20 Ujumqin (UJU) ewes naturally infected with gastrointestinal nematodes were randomly assigned to one of four treatments arranged in a 2 × 2 factorial design, receiving anthelmintic treatment (AT) or non-anthelmintic treatment (NonAT) prior to lambing. After lambing, the effects of AT on feed intake, digestion and milk yield in ewes, and the growth rates of lambs fed their mother's milk were assessed for 28 days. Faecal samples were collected to determine faecal egg counts (FECs), milk was collected to measure milk yield and ewes and lambs were weighed to quantify daily body weight change. The results showed that AT significantly increased ewe dry matter intake (2411 g/d for AT and 2209 g/d for NonAT) and decreased FECs (50 eggs/g for AT and 2655 eggs/g for NonAT). All ewes lost weight after lambing, but body weight loss in the AT (43 g/d) was significantly less than in NonAT (84 g/d), and STH ewes (70 g/d) lost more weight than UJU ewes (58 g/d). Anthelmintic-treated ewes produced more milk for their lambs to consume. However, the extent of these positive effects of AT differed between STH and UJU ewes. The average daily body weight gain of lambs in AT was higher than those in NonAT. In conclusion, effective AT in ewes before lambing benefits subsequent lactation in ewes and growth rate in lambs.

Type
Animal Research Papers
Information
The Journal of Agricultural Science , Volume 155 , Issue 2 , March 2017 , pp. 326 - 333
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Copyright
Copyright © Cambridge University Press 2016 

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