Determinação da exigência nutricional de cálcio e níveis de suplementação de vitamina D para codornas de corte em crescimento

• Ano de defesa: 2013
• Autor(a) principal: Perine, Taynara Prestes
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual de Maringá; Brasil; Programa de Pós-Graduação em Zootecnia; UEM; Maringá, PR; Centro de Ciências Agrárias
• Palavras-chave em Português: Parâmetros ósseos; Desempenho; Exigência nutricional; Codornas de corte; Brasil.; Bone parameters; Performance; Nutritional requirement; Quails; Brazil.; Ciências Agrárias; Zootecnia
• Link de acesso: http://repositorio.uem.br:8080/jspui/handle/1/1721

Two experiments were carried out in order to determine the levels of vitamin D (Vit. D) and the nutritional requirements of calcium (Ca) for developing meat quails (Coturnix coturnix sp). The first experiment aimed to determine the levels for the first phase of creation, in the period from 1 to 14 days old. It has been used 2,064 meat quails, distributed in a factorial experiment with 4 x 4 (levels of calcium = 0.42, 0.58, 0.74, 0.90% x levels of vitamin D = 1.000, 2.000; 3,000, 4,000 IU), reaching a total of 16 treatments with 3 repetitions and 43 quails per experimental unit. The body weight (BW), weight gain (WG) and body biomass accumulation (BBA) showed a quadratic effect due to the increased levels of calcium and vitamin D, estimating levels of 0.73%, 0.73% and 0.74 % Ca and 2,935 IU, 2,883 IU and 2,863 IU of Vitamin D, respectively. The feed intake (FI) was not significant for Vitamin D and it showed a quadratic effect for calcium, estimating 0.72% of calcium. There was no interaction due to the levels of calcium and vitamin D on bone parameters of the variables. The bones calcium (BC), bone phosphorus (BPh), bone ash (BA), femur bone strength (FBS), tibia bone strength (TBS) and the femur index of Seedor (FIS) showed a quadratic effect due to the increased calcium levels, estimating 0.78%, 0.71%, 0.78%, 0.77%, 0.83% of Ca and 0.71%, respectively. Bone densitometry (BD) increased linearly because of the increased levels of Vitamin D. It has been concluded that the required level of supplemental Ca and Vitamin D for quails during the period of 1 to14 days old in order to optimize the performance in weight gain is 0.73% of Ca and 2,883 IU of Vitamin D. The second experiment aimed to determine the levels for the second phase of creation, in the period from 15 to 35 days old. It has been used 1,920 meat quails, distributed in a factorial experiment with 4 x 4 (levels of calcium = 0.42, 0.58, 0.74, 0.90% x levels of vitamin D = 1.000, 2.000; 3,000, 4,000 IU), reaching the total of 16 treatments with 3 xvi repetitions and 40 quails per experimental unit. The BW and WG increased linearly and feed conversion (FC) improved linearly due to the increasing levels of Ca and Vitamin D. The levels of Vitamin D resulted in a linear increase in FI and calcium levels increased linearly BAB. The PHB, the TBS and BD showed no effect with the increasing levels of Ca and Vitamin D in the diet. The CB and BA presented no effect in spite of the increased levels of Ca, but responded quadratically depending on the levels of Vitamin D diet, estimating levels of 2,712 IU and 2,700 IU of Vitamin D, respectively. The ISF, IST and FBS showed a linear increase with increasing levels of Ca and ISF also showed a quadratic response with the increased levels of Vitamin D, estimating the level of 2,756 IU. It has been concluded that the supplemental levels of Ca and Vitamin D required for a maximum growing and performance of meat quails during the period of 15 to 35 days old is greater or equal to 0.73% for Ca and greater or equal to 2,883 IU of Vitamin D, it possibly happened for the reason that the experiment has been done at the pre-posture phase, when these nutrients are less needed. Keywords: bone parameters, performance, nutritional requirement.