Características ósseas de frangos de corte suplementados com Solanum glaucophyllum

• Autor(a) principal: Drosghic, Laura Caroline Almeida Branco
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFMT
• Texto Completo: http://ri.ufmt.br/handle/1/214
• topic: Colágeno; Mineral; Vitamina D3; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA; Collagen; Mineral; Vitamin D3

Poultry farming has always aimed to maximize production efficiency in broilers, but unwanted characteristics came together with these improvements. Bone disorders are caused by rapid deposition of animal tissue, while the bone development continues its normal growth. This meant the movement capacity was damaged, as the welfare and consequently the development of these birds. Several nutritional programs have been emerged, such as the use of vitamin D and its metabolites involved in regulating calcium and phosphorous homeostasis by a mechanism which enhances their intestinal uptake, reducing renal losses and stimulating bone resorption. With the present study, it was aimed to use Solanum glaucophyllum as a supplementary source of 1,25-dihydroxycholecalciferol in bone characteristics of broiler chickens. To this end, two assays were conducted. In the assay 1, they were used female broilers, and in the assay 2, male broilers. It was evaluated the additional use of Solanum glaucophyllum as a source of active vitamin D3. A total of 1,296 broiler chickens of Cobb® trademark were used in a randomized block design, with 6 treatments and 6 repetitions with 18 birds. The treatments consisted of supplementation of 0.0; 0.5; 1.0; 1.5; 2.0 and 2.5 μg of active vitamin D3 / kg of feed. At 21 and 35 days of age, the birds were weighed and one chicken by repetition, representing the average weight of the lot, was slaughtered in order to get the tibia tarsus. The analyzed variables included fresh, dry and degreased weights, length, diameter, bone resistance, Seedor index, collagenous and non-collagenous protein contents, minerals and ashes. In the assay 1, at 35 days of age , the organic and mineral composition of the bones ( fresh weight, non- collagenous proteins and ashes) were affected by the additional provision of 2.5 μg of vitamin D3 in the 1,25 (OH ) 2D3 form. In the assay 2, bone characteristics were affected by active vitamin D3 supplementation in the diet. It is recommended the provision of 1.5 μg of active vitamin D3 in feed for broilers from 8 to 35 days old.