Energia metabolizável para galinhas poedeiras

• Autor(a) principal: Jerez, Elcer Albenis Zamora
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5742
• topic: Nutrição poedeiras; Exigência nutricional; Alimentação; Nutrition hens; Nutritional requirements; Feed; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL::AVALIACAO DE ALIMENTOS PARA ANIMAIS

An experiment was carried out at the poultry department of Animal Science, Federal University of Viçosa to evaluate the effect of three different levels of neutral detergent fiber (NDF) and two energy levels in diets for chickens laying hens in the second production cycle. A total of 360 chickens laying hens strain Hy-Line W-36, during three periods of 28 days each, in a randomized block design with a factorial 2 x 3 (two energy levels and three levels of NDF) with ten repetitions and six birds in each experimental unit. Diets were formulated with varying levels of addition of wheat bran (0, 8 and 16%) and soybean hulls (0, 2 and 4%), resulting in levels of 10.9, 13.6 and 16.4 % NDF (respectively levels 1, 2 and 3 NDF) levels of metabolizable energy (ME) were used, 2800.0 and 2833.0 kcal / kg considering the better utilization of energy from food by adult animals. Was observed a significant interaction (P <0.05) between the levels of NDF and ME for feed intake (FI), feed conversion ratio per dozen eggs (FCRDE) and feed conversion by egg mass. (FCREM) generally, level 2 NDF combined with level 1 MS had lower FI and better FCRDE and FCREM. The interaction was not observed (P> 0.05) for percentage of posture (POST%), egg weight (EW) and egg mass (EM). A use of level 2 NDF did not affect POST% compared to level 1 NDF. EW and ME were not affected by dietary NDF levels. No interaction (P> 0.05) between the levels of NDF and ME in diets in relation to the values of Nitrogen-corrected apparent metabolizable energy (NCAME). The levels increase in NDF decreased (P <0.05) levels in the diets of birds NCAME. Recommends the use of at most 13.6% of NDF in diets for laying hens without the occurrence of adverse effects on egg production.