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| Titel: |
Breed and sex differences in the growth rates of chicks fed diets supplemented with penicillin |
| Auteur: |
King, J. O. L. |
| Verschenen in: |
British poultry science |
| Paginering: | Jaargang 11 (1970) nr. 2 pagina's 153-159 |
| Jaar: |
1970-04 |
| Inhoud: |
Nine hundred and forty-seven chicks comprising 490 chicks of heavy type and 457 chicks of light type laying breeds were reared in a series of experiments. Approximately one-half was fed on a basal ration and the other on this ration plus 55 mg of procaine penicillin per kg of food. An additional 120 chicks, equal numbers of both sexes of both types, were reared on the above-mentioned rations and half were killed at 3 weeks of age and the other half at 9 weeks so that their intestines could be studied at post-mortem examination. The male chicks fed the antibiotic grew at a significantly faster rate than the females up to 3 weeks of age, and the weights of 1 cm lengths of the small intestine were significantly reduced by the antibiotic in the male chicks at 9 weeks of age. Type responses were not clearly defined, but there was a significant reduction in the weight of 1 cm lengths of the small intestine at 9 weeks of age in the heavy type chicks when compared with the light type. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 18 gevonden artikelen
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