Banca de DEFESA: GIOVANA FOGAÇA GONZAGA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : GIOVANA FOGAÇA GONZAGA
DATA : 22/02/2019
HORA: 09:00
LOCAL: Embrapa - Sala de reuniões - Agricultura Orgânica
TÍTULO:

Balanced feed with sweet potatoes to replace maize for laying hens in organic production system

PALAVRAS-CHAVES:

Gallus gallus domesticus

Ipomoea batatas

 Zea mays

PÁGINAS: 65
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
RESUMO:

The general objective of this work was to formulate a balanced diet with sweet potatoes to replace the maize ingredient in order to test the quality of the eggs generated from this alternative for the feeding of laying hens in organic systems. It was also evaluated the productive performance of the animals, monitoring weight, number of eggs and percentage of posture in cycles of 21 days. The experiment was carried out over 84 days with collections in cycles comparing quality between lots that received ration identical to that formulated by most industries, and other lots that received feed composed of sweet potato flour in the energy composition. The animals were kept in adequate housing for organic production respecting animal welfare, with control of weight gain and health monitoring in general. For the productive parameters tested, feed conversion, egg laying percentage and egg mass, Mixed Mixed stance birds in the second laying cycle, when fed with sweet potato meal, had low productive indexes when compared to animals fed with bran meal the energy part of the feed. For the variable weight gain the response of both treatments did not present statistical significance, evidencing the non-compromising of the body condition of the animals that fed FBD.
When testing the external quality of the eggs of animals under diet with FBD for the parameters egg weight, bark thickness and percentage of bark, they did not present inferior results to the animals fed with FM, evidencing that, most of the parameters of external quality are not adversely affected when replacing FM with FBD in the Mixed Layer ration. For the variable bark weight, corn meal treatment presented better results.
For the parameters of egg quality, the variables albumin height, yolk color, haugh unit, yolk percentage, albumen percentage, yolk index, albumen pH and yolk pH were statistically similar results for both treatments. Demonstrating that, for these internal parameters, the FBD has an analogous result to FM feeding. However, for the parameters of yolk, yolk weight and yolk diameter, the animals submitted to FM treatment presented higher results.
Observing the results, it is suggested that, in order to better understand the development of laying birds under alternative energy diet, it is important to carry out longer research to evaluate the behavior of different stages of production under a sweet potato diet. It is important that several races are submitted to alternative food treatments, in order to study the response to treatments under different genetic conditions. The sweet potato meal ration can not be recommended using 100% replacement corn, due to the variation found in egg quality standards during the research.

MEMBROS DA BANCA:
Interno - 750.960.133-91 - EDNALDO DA SILVA ARAÚJO - EMBRAPA
Interno - 002.232.757-60 - JOSÉ ANTONIO AZEVEDO ESPINDOLA - EMBRAPA
Externo à Instituição - MARCOS FÁBIO DE LIMA - IFRJ