Dissertation/ Thesis
Relação entre energia metabolizável e aminoácidos sulfurosos para frangas leves
| العنوان: | Relação entre energia metabolizável e aminoácidos sulfurosos para frangas leves |
|---|---|
| المؤلفون: | Pinheiro, Sara Gomes |
| المساهمون: | Costa, Fernando Guilherme Perazzo, http://lattes.cnpq.br/7950825762365762, Guerra, Ricardo Romão |
| بيانات النشر: | Universidade Federal da Paraíba Brasil Zootecnia Programa de Pós-Graduação em Zootecnia UFPB |
| سنة النشر: | 2023 |
| المجموعة: | Universidade Federal da Paraiba: Biblioteca Digital de Teses e Dissertações |
| مصطلحات موضوعية: | Desempenho, Energético, Exigência nutricional, CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL |
| الوصف: | The aim of this study was to determine the optimal relationship between the level of recommendation of metabolizable energy (ME) and digestible methionine + cystine (M+C dig.) for pullets and laying hens. The experimental design was completely randomized factorial distributed in 4 levels of digestible methionine+cystine (M+C dig.) x 3 levels metabolizable energy (ME). The diets had two recommendation bases for M+C dig.; one for 100% of the recommendation, and one which can meet the proposed varied ± 10% of this recommendation. For ME were suggested three levels, one being the recommendation of literature and other varying ± 5% to 12 treatments. From 1 to 6 weeks there was a significant extent on the interaction of the factors analyzed in all tested variables, showing that dietary changes both in M+C as the energy density can result in better development of gastrointestinal tract, increasing the efficiency of absorption of feed, and consequently improving feed conversion. In 7 to 12 weeks, there was only significant difference for bursa weight, serological tests, small intestine histomorphometric and the variables that the nitrogen balance. No hepatic steatosis occurred at any phases. It is recommended to use 0.667% M+C dig. associated with 2755 kcal / kg of EM (ratio MS: M + of 4130.32 digestible C) in the diet for pullets (1 to 6 weeks), which corresponds to a daily intake of 184 mg M+C dig/pullet. For 7-12 weeks, the recommendation was 0.497% of M+C dig. associated to 2,755 kcal/kg of EM (ME:M+C of 5543.26), which corresponds to a daily intake of 136 mg of M+C/pullet. In the laying period (24 to 44 weeks) was observed interaction the factors tested for the performance variables and quality of the eggs except for egg weight, egg mass, specific gravity, shell thickness, yolk weight, percentage of albumen and yolk. In the slaughter of variables was no interaction abdominal fat weight and liver, but had no severe hepatic steatosis degree. In serological tests and small intestine and uterus histomorphometric was no ... |
| نوع الوثيقة: | thesis |
| اللغة: | Portuguese |
| Relation: | https://repositorio.ufpb.br/jspui/handle/123456789/26153 |
| الاتاحة: | https://repositorio.ufpb.br/jspui/handle/123456789/26153 |
| Rights: | Acesso aberto ; Attribution-NonCommercial-NoDerivs 3.0 Brazil ; http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
| رقم الانضمام: | edsbas.FA7FE58 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |