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The effect of diet and frequency of watering on the performance of growing cattle given food at maintenance

Published online by Cambridge University Press:  02 September 2010

P. R. Hatendi ,
F. M. Mulenga ,
S. Sibanda  and
P. Ndlovu
P. R. Hatendi
Affiliation:
Grasslands Research Station, Post Bag 3701, Marondera, Zimbabwe
F. M. Mulenga
Affiliation:
Department of Animal Science University of Zimbabwe, PO Box MP 167, Mount Pleasant, Harare, Zimbabwe
S. Sibanda
Affiliation:
Department of Animal Science University of Zimbabwe, PO Box MP 167, Mount Pleasant, Harare, Zimbabwe
P. Ndlovu
Affiliation:
Department of Animal Science University of Zimbabwe, PO Box MP 167, Mount Pleasant, Harare, Zimbabwe
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Abstract

An 18-week experiment investigated the effects of type of diet and frequency of watering on the performance of growing cattle given food at maintenance (metabolizable energy (ME) allowance (MJ) = 8·3 + 0·091 M where M = live weight of the animal). Three diets with 20: 80 (low, L), 50:50 (medium, M) and 80: 20 (high, H) roughage to concentrate ratios (10·2, 7·8 and 5·4 MJME per kg dry matter) were used in combination with free access to water for 2·5 h once daily or once every 3rd day. A completely randomized-block design with a 3 (diets) × 2 (watering frequencies) factorial arrangement of treatments was used. Five animals were allocated per treatment (average weight 245 (s.d. 21·6) kg).

Dry-matter intake increased as the roughage content of the diet increased (P < 0·05) but was not affected by the watering regime (P > 0·05). Total water intake was found to be positively correlated with dry-matter intake and increased with dietary roughage level. Animals watered daily drank more (P < 0·05) water (12·6 v. 10·0 kg/day) than those watered every 3rd day. The apparent digestibility of the diets decreased as the amount of roughage increased (diet L 734g/kg, M471 g/kg and H 433 g/kg). Similar apparent digestibilities were observed under the two watering frequencies (546 g/kg and 547 g/kg).

Type of diet significantly (P < 0·05) affected the final weights of the steers. Animals given diet H were proportionately 0·07 heavier than those offered diet L corresponding to total weight changes of −0·8 and +18·4 kg respectively. Carcass weight, backfat thickness and eye muscle area were not affected by the treatments. The chemical composition of the 9 to 11th rib joint was only affected by diet H which gave less fat (P < 0·05). Water, fat, protein and ash content averaged 607,118,190 and 84 g/kg respectively.

Keywords

beef cattlecarcass compositionnutrient densitywater intake
Type
Research Article
Information
Animal Science , Volume 63 , Issue 1 , August 1996 , pp. 33 - 38
Copyright
Copyright © British Society of Animal Science 1996

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