| Autor: |
Alvin L. Moxon, J. B. Taylor, W. O. Wilson, W. E. Poley |
| Rok vydání: |
1941 |
| Předmět: |
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| Zdroj: |
Poultry Science. 20:171-179 |
| ISSN: |
0032-5791 |
| DOI: |
10.3382/ps.0200171 |
| Popis: |
STUDIES dealing with the effects of feeding cereal grains containing selenium to laying hens have been previously reported by Franke and Tully (1935) and Poley et al. (1937). It was also shown by Poley and Moxon (1938) that the use of more than 5 parts per million of selenium in the breeder ration resulted in lower hatchability, and that when the ration contained 10 p.p.m. of selenium the hatchability decreased to zero. It was observed that the growth and mortality rates of chicks hatched from hens receiving 5 p.p.m. of selenium in their ration were not appreciably affected when these chicks received starting rations containing no selenium. Tully and Franke (1935) showed that the feeding of selenized grains to chicks during the first eight weeks resulted in slow growth. The amounts of selenium included in the rations were not determined. The experiments reported here were conducted with two main objectives . . . |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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