Abstract
Three energy and protein levels in the ration fed potential artificial insemination sires during the first year of age were evaluated with respect to health, body and testicular growth rate, puberty and sperm quality of the animals. Treatment were, Group I, NRC requirements for energy and protein for growing dairy bulls with daily weight gains from 0.4 to 0.9 kg/day; and Groups II and III which were fed 15 and 30% over the recommended energy and protein requirements, respectively. Blood metabolites were found within the reference range. Plasma Cu and Zn were lower in Groups I and III as compared to Group II. Histological studies and gross weights of the thyroid glands were compatible with hypofunction of the glands in animals from Groups I and III. In Group III, 60% of animals showed abundant fat deposition in testicles. Normal fibroelastic consistency of testicles was found in 30, 80, and 20% of animals in Groups I, II, and III, respectively, at 365 days of age. The area under the curve was 641.5, 982.9 and 462.2 for Groups I, II and III, respectively. Volume, motility and percentage of living spermatozoa increased with age (P<0.05) while total morphological alterations decreased significantly. Animals in
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Alvarez, J L;
Zaldivar, V;
Tamayo-Aviles, A;
Faure, R;
[1]
Boado, A;
Lannes, M
[2]
- Centro Nacional de Sanidad Agropecuaria, Havana (Cuba). Dept. de Reproduccion
- Instituto Superior de Ciencias Agropecuarias de la Habana, Havana (Cuba). Dept. de Nutricion Animal
Citation Formats
Alvarez, J L, Zaldivar, V, Tamayo-Aviles, A, Faure, R, Boado, A, and Lannes, M.
Effect of energy and protein levels on health, growth, puberty and semen quality of Holstein bull-calves undergoing progeny.
IAEA: N. p.,
1996.
Web.
Alvarez, J L, Zaldivar, V, Tamayo-Aviles, A, Faure, R, Boado, A, & Lannes, M.
Effect of energy and protein levels on health, growth, puberty and semen quality of Holstein bull-calves undergoing progeny.
IAEA.
Alvarez, J L, Zaldivar, V, Tamayo-Aviles, A, Faure, R, Boado, A, and Lannes, M.
1996.
"Effect of energy and protein levels on health, growth, puberty and semen quality of Holstein bull-calves undergoing progeny."
IAEA.
@misc{etde_385107,
title = {Effect of energy and protein levels on health, growth, puberty and semen quality of Holstein bull-calves undergoing progeny}
author = {Alvarez, J L, Zaldivar, V, Tamayo-Aviles, A, Faure, R, Boado, A, and Lannes, M}
abstractNote = {Three energy and protein levels in the ration fed potential artificial insemination sires during the first year of age were evaluated with respect to health, body and testicular growth rate, puberty and sperm quality of the animals. Treatment were, Group I, NRC requirements for energy and protein for growing dairy bulls with daily weight gains from 0.4 to 0.9 kg/day; and Groups II and III which were fed 15 and 30% over the recommended energy and protein requirements, respectively. Blood metabolites were found within the reference range. Plasma Cu and Zn were lower in Groups I and III as compared to Group II. Histological studies and gross weights of the thyroid glands were compatible with hypofunction of the glands in animals from Groups I and III. In Group III, 60% of animals showed abundant fat deposition in testicles. Normal fibroelastic consistency of testicles was found in 30, 80, and 20% of animals in Groups I, II, and III, respectively, at 365 days of age. The area under the curve was 641.5, 982.9 and 462.2 for Groups I, II and III, respectively. Volume, motility and percentage of living spermatozoa increased with age (P<0.05) while total morphological alterations decreased significantly. Animals in Group II had the best sperm production. Histological evaluation revealed 80 and 100% of testicular degeneration in animals from Groups I and III, respectively. The application of diet in Group II is recommended to be used in specialized AI bull rearing units in Cuba according to the quantities and characteristics evaluated in this design. 61 refs, 3 figs, 5 tabs.}
place = {IAEA}
year = {1996}
month = {May}
}
title = {Effect of energy and protein levels on health, growth, puberty and semen quality of Holstein bull-calves undergoing progeny}
author = {Alvarez, J L, Zaldivar, V, Tamayo-Aviles, A, Faure, R, Boado, A, and Lannes, M}
abstractNote = {Three energy and protein levels in the ration fed potential artificial insemination sires during the first year of age were evaluated with respect to health, body and testicular growth rate, puberty and sperm quality of the animals. Treatment were, Group I, NRC requirements for energy and protein for growing dairy bulls with daily weight gains from 0.4 to 0.9 kg/day; and Groups II and III which were fed 15 and 30% over the recommended energy and protein requirements, respectively. Blood metabolites were found within the reference range. Plasma Cu and Zn were lower in Groups I and III as compared to Group II. Histological studies and gross weights of the thyroid glands were compatible with hypofunction of the glands in animals from Groups I and III. In Group III, 60% of animals showed abundant fat deposition in testicles. Normal fibroelastic consistency of testicles was found in 30, 80, and 20% of animals in Groups I, II, and III, respectively, at 365 days of age. The area under the curve was 641.5, 982.9 and 462.2 for Groups I, II and III, respectively. Volume, motility and percentage of living spermatozoa increased with age (P<0.05) while total morphological alterations decreased significantly. Animals in Group II had the best sperm production. Histological evaluation revealed 80 and 100% of testicular degeneration in animals from Groups I and III, respectively. The application of diet in Group II is recommended to be used in specialized AI bull rearing units in Cuba according to the quantities and characteristics evaluated in this design. 61 refs, 3 figs, 5 tabs.}
place = {IAEA}
year = {1996}
month = {May}
}