Validação das relações de aminoácidos com a lisina digestível e avaliação de diferentes densidades nutricionais em rações para porcas em lactação

• Autor(a) principal: Haese, Douglas
• Data de Publicação: 2007
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/1697
• topic: Ração; Aminoácidos; Suíno; Feeds; Amino acids; Swine; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL

Two experiments were made with 200 sows distributed in a completely randomized block design to validate the relations of the digestible amino acids threonine, tryptophan, valine, methionine+ cystine with the digestible lysine on the concept of the ideal protein for sows during lactation and the other to evaluate high nutritional density rations for sows during lactation, considering the productive and reproductive performances. On the first experiment, 120 sows were used, distributed in six treatments and 20 repetitions. The treatments had no effect over the daily mean ration consumption neither over the daily mean consumption of the digestible lysine. The treatments did not have influence on the weight loss and weight variation, neither on the backfat thickness and backfat thickness variation, neither on the body protein and body protein variation, neither on the body fatness and body fatness variation, neither on the weaning- to-estrus interval and neither on the estimated milk production of the sows during the lactation period. On the second experiment, 80 sows were used, distributed in four treatments and 20 repetitions. The treatments had no effect over the daily mean ration consumption of the sows. A significant increase has been observed on the digestible lysine consumption between the treatments. The treatments had no influence over the weight, neither on the weight loss and weight variation, neither on the weaning-to-estrus interval and neither on the milk production estimated from the sows during the lactation period. The conclusion is that the relation of the amino acids methionine+cystine (54%), threonine (64%), trypotophan (19%) and digestible valine (78%) with the digestible lysine proposed on the ideal protein by Rostagno et al. (2005), attend to the sows requirements during lactation to improve the production and reproduction characteristics. High density rations, with or without industrial amino acids supplementation, for sows during lactation, reduced the mobilization of corporal reserves on sows, not affecting significantly the productive and reproductive performance of them.