| Autor: |
de Menezes GC; Animal Science Department, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil, gc.felix@hotmail.com., Valadares Filho Sde C, Lopez-Villalobos N, Ruas JR, Detmann E, Zanetti D, Menezes Ade C, Morris S, Mariz LD, de Duarte Mde S |
| Jazyk: |
angličtina |
| Zdroj: |
Tropical animal health and production [Trop Anim Health Prod] 2015 Aug; Vol. 47 (6), pp. 1095-100. Date of Electronic Publication: 2015 Apr 26. |
| DOI: |
10.1007/s11250-015-0832-5 |
| Abstrakt: |
The objective of this study was to evaluate the effect of five feeding strategies on calf weaning weight, and cow milk production and composition in Brazilian Holstein × Zebu cows. A total of 60 cows and their calves were allocated to each of five treatments. Cows in treatments 1, 2 and 3 were milked for 270 days and cows in treatments 4 and 5 were milked for 180 days. Calves in treatment 1 (CON) were not supplemented with concentrate whereas calves from treatment 2 (CLPN) received 1 kg of concentrate daily from 90 to 270 days of age and calves from treatment 3 received 1 kg of concentrated from 180 to 270 days of age. Calves in treatment 4 (CCPS) were supplemented with 1 kg of concentrate from 90 to 180 days of age and calves in treatment 5 (CLPS) were supplemented with 1 kg of concentrate from 90 to 270 days of age. Calves from the CLPS treatment had greater milk and protein intakes (P < 0.05) and greater growth rate than calves from the other treatments. Our results indicate that the traditional system of feeding calves with no concentrate results in a weight gain of 600 g/day. The CLPS treatment produced calves with the highest live weight and growth rate. The nutritional strategy with restricted supply of milk for the calves with concomitantly short-term concentrate supplementation does not improve performance of calves but did increase feed costs. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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