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Food, fibre and pharmaceuticals from animals
RESEARCH ARTICLE

Effect of weaning age and milk feeding level on pre- and post-weaning growth performance of Sahiwal calves

Ahsan Tasawar Cheema A , Shaukat Ali Bhatti A E , Ghulam Akbar B , Peter C. Wynn C , Ghulam Muhammad D , Hassan Mahmood Warriach C and David McGill C
+ Author Affiliations
- Author Affiliations

A Institute of Animal Sciences, University of Agriculture, Faisalabad, Pakistan.

B Livestock Production Research Institute, Bahadurnagar, Okara, Pakistan.

C Graham Centre for Agricultural Innovation, Charles Sturt University, Wagga Wagga, Australia.

D Department of Clinical Medicine and Surgery, University of Agriculture, Faisalabad, Pakistan.

E Corresponding author. Email: sabhatti60@gmail.com

Animal Production Science 58(2) 314-321 https://doi.org/10.1071/AN15719
Submitted: 11 October 2015  Accepted: 17 August 2016   Published: 13 October 2016

Abstract

The Sahiwal cow is a tropical dairy breed native to Pakistan. The objective of the present study was to evaluate pre- and post-weaning growth of Sahiwal calves weaned either at 8 or 12 weeks and offered milk at either 10% or 15% of bodyweight (BW) from birth to weaning. Colostrum fed Sahiwal calves (n = 48) were randomly allocated to four treatments of 12 calves each. Calves were offered milk either at 10% (low-milk) or 15% (high-milk) of BW in two weaning programs (early or late). Early weaned calves were offered milk until Day 35, adjusted weekly for liveweight and then reduced by one-third in each subsequent week until weaned at Day 56 (early weaned). Late-weaned calves were offered milk until Day 63 and were weaned at Day 84 (late-weaned) by reducing milk offered by one-third in each subsequent week. Calves were offered a concentrate ration (21% crude protein and 2.93 metabolisable energy, Mcal/kg) from Day 28 to Day 112. Final BW at 16 weeks was highest (77.6 ± 1.8 kg; P < 0.01) in high milk-fed late-weaned calves and lowest in low milk-fed early weaned calves (60.2 ± 1.8 kg). High-milk early weaned and low milk late-weaned calves had comparable final BW (70.7 ± 1.8 vs 72.0 ± 1.8 kg), although lower than that of high-milk late-weaned calves, but still at an acceptable lower feeding cost to gain per kg liveweight (US$ 3.2 vs 2.5). Thus, offering milk to Sahiwal calves at 15% of BW and weaning at 8 weeks saves milk and labour required for additional days to feed these calves.

Additional keywords: early vs late weaning, feeding cost, high or low milk, weight gain.


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