Effect of feeding strategies on weaning weight and milk production of Holstein × Zebu calves in dual purpose milk production systems.
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.
Animal Science Department, Federal University of Viçosa, Viçosa, MG, 36570-000, Brazil, gc.felix@hotmail.com.
Gustavo Chamon de Castro
GC
de Menezes
Sebastião de campos
Sde C
Valadares Filho
Nicolas
N
Lopez-Villalobos
José Reinaldo Mendes
JR
Ruas
Edenio
E
Detmann
Diego
D
Zanetti
Arismar de Castro
Ade C
Menezes
Stephen
S
Morris
Lays Débora Silva
LD
Mariz
Marcio de Souza
Mde S
de Duarte
D000821:Animal Feed; D000822:Animal Husbandry; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D000833:Animals, Suckling; D001835:Body Weight; D001938:Brazil; D002417:Cattle / Q000502:physiology*; D003433:Crosses, Genetic; D019587:Dietary Supplements; D005260:Female; D007774:Lactation; D008297:Male; D008892:Milk / Q000378:metabolism*; D015430:Weight Gain