Observações sôbre a quantidade de milho amarelo necessária para prevenir a avita-minose a em pintosAbstract
The authors tried to check in this experiment the minimum of yellow corn necessary for preventing avitaminosis A in chickens. It was observed, in balanced ration with 50% of corn, that: a) 20% of dent and yellow grains and 30% of flint and white grains were insuficient to prevent avitaminosis A. b) 20% of flint and orange grains and 30% of flint and white grains or 40% of either colored grains and 10% of flint, and white grains did not show evident signs of avitaminosis A during the 12 weeks of the experiment. The ration containing 20% of flint and orange grains is pratically equivalent to the ration containing 40% of dent and yellow grains, regarding the content of pro-vitamina A. However, it was not possible to conclude if these dosage are sufficient to give the necessary vitamina A for normal development of the chickens since the table 3 seems to indicate a negative correlation between the amount of pigment in the ration and the mortality of the animals.
Observações sôbre a quantidade de milho amarelo necessária para prevenir a avita-minose a em pintos*
E. A. Graner; A. Bergamin
Escola Superior de Agricultura "Luiz de Queiroz" Universidade de São Paulo
ABSTRACT
The authors tried to check in this experiment the minimum of yellow corn necessary for preventing avitaminosis A in chickens.
It was observed, in balanced ration with 50% of corn, that:
a) 20% of dent and yellow grains and 30% of flint and white grains were insuficient to prevent avitaminosis A.
b) 20% of flint and orange grains and 30% of flint and white grains or 40% of either colored grains and 10% of flint, and white grains did not show evident signs of avitaminosis A during the 12 weeks of the experiment.
The ration containing 20% of flint and orange grains is pratically equivalent to the ration containing 40% of dent and yellow grains, regarding the content of pro-vitamina A. However, it was not possible to conclude if these dosage are sufficient to give the necessary vitamina A for normal development of the chickens since the table 3 seems to indicate a negative correlation between the amount of pigment in the ration and the mortality of the animals.
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BIBLIOGRAFIA
Referências bibliográficas
- 1) GRANER, E. A. (1946). A importância do milho amarelo na alimentação dos animais. Revista de Agricultura 21: 5-7.
- 2) GRANER, E. A. (1946). A influência dos pigmentos amarelo-laranja da semente de milho na coloração da gema de ôvo de galinha. Anais da Escola Superior de Agriculcura "Luiz de Queiroz" 3: 425-436.
- 3) GRANER, E. A. e A. P. TORRES (1947). Os pigmentos amarelo-laranja do grão de milho como precursores da vitamina A na alimentação dos pintos. Anais da Escola Superior de Agricultura "Luiz de Queiroz" 4: 289-306.
- 4) JULL, M. A. (1938). Poultry Husbandry. MacGraw-Hill Book Co., New York.
- 5) SNEDECOR, G. W. (1940). Statistical Methods. The Iowa State College Press, Ames, Iowa.
