RESUMO
The aim of this study was to evaluate the effects of organic micromineral zinc (Zn) and manganese (Mn) and 25-hydroxycholecalciferol supplementation in late-phase laying hens' diets on performance, egg quality, lipid stability of fresh and stored eggs, and bone quality. The treatments were a basal diet and diets supplemented with 32 mg Zn-Met/kg diet; 26 mg Mn-Met/kg diet; 32 mg Zn-Met/kg diet and 26 mg Mn-Met/kg diet; 1500 IU 25-hydroxycholecalciferol/kg diet; 32 mg Zn-Met/kg diet; 26 mg Mn-Met/kg diet; and 1500 IU 25-hydroxycholecalciferol/kg diet. On performance, the birds supplemented with organic manganese had the lowest feed intake. Regarding egg quality, the birds supplemented with Zn-Met and Mn-Met, with 25-hydroxycholecalciferol alone, and with Zn-Met, Mn-Met and 25-hydroxycholecalciferol presented a greater eggshell thickness than those receiving the basal diet. Lipid stability of the yolk varied only according to storage time. No effect of supplementation was observed on bone quality. Supplementation with Zn-Met and Mn-Met, or associated with 25-hydroxycholecalciferol, or 25-hydroxycholecalciferol alone, improved eggshell thickness in aged white layers. However, the associated or isolated supplementation with these nutrients did not influence performance, lipid stability of fresh and stored egg yolk or bone quality.
Assuntos
Casca de Ovo , Manganês , Ração Animal/análise , Animais , Calcifediol/farmacologia , Galinhas , Dieta/veterinária , Suplementos Nutricionais , Ovos , Feminino , Óvulo , ZincoRESUMO
A study was aimed to evaluate the effects of cashew nut meal inclusion (CNM) on nutrient digestibility, performance and carcass characteristics of meat quails. A total of 432 meat quails with 7 days of age, were distributed in a completely randomized design with six treatments and nine replicates of eight birds each. Treatments were obtained with inclusion of CNM at levels of 0, 50, 100, 150, 200, and 250 g/kg. According to regression analysis, the inclusion of CNM, at levels above 50 g/kg, provided a linear reduction in digestibility of dry matter and metabolizable energy of diets, linear increase in feed intake and an increase in feed conversion ratio, not influencing weight gain and carcass characteristics. Comparing the results obtained with the different inclusion levels compared to those obtained with the diet without CNM (control group), it was noted that diets with 200 g/kg of CNM inclusion, the dry matter digestibility and metabolizable energy of diet were lower and the level of 250 g/kg provided higher feed intake. Considering the results, it can be inferred that cashew nut meal can be used as a feedstuff in meat quail's diets at levels up to 250 g/kg.
Assuntos
Ração Animal/análise , Fenômenos Fisiológicos da Nutrição Animal/efeitos dos fármacos , Dieta/veterinária , Nozes , Anacardium , Animais , Coturnix , Relação Dose-Resposta a Droga , Metabolismo Energético , Feminino , Masculino , Óvulo , Distribuição Aleatória , Análise de Regressão , Aumento de Peso/efeitos dos fármacosRESUMO
O experimento foi conduzido com o objetivo de avaliar a energia metabolizável aparente de fenos de forrageiras do semi-árido nordestino para aves da linhagem Isa Label. Foram alojadas 60 frangas em gaiolas metálicas adaptadas para o ensaio de digestibilidade, distribuídas em um delineamento inteiramente casualizado com cinco tratamentos e 12 repetições. Os tratamentos foram elaborados a partir de uma ração controle (milho, soja, vitaminas e minerais) a partir da qual foram gerados os demais tratamentos dietéticos, através da substituição de 20% desta ração (kg/kg) para os fenos das forrageiras, flor de seda, leucena, mandioca e mata-pasto de acordo com a metodologia convencional de avaliação energética de alimentos para aves. O feno de leucena proporcionou maior valor de energia metabolizável (2233,69 cal/g), os fenos de mata pasto (1882,70 cal/g) e maniva de mandioca (1812,11 cal/g) destacaram-se pelos valores próximos e intermediários, enquanto o feno de flor de seda propiciou o menor valor de energia metabolizável para as aves (809,10 cal/g). Portanto, dentro de certos limites quantitativos, a adequada combinação dos fenos de leucena, mata pasto e maniva de mandioca em rações completas para aves caipiras pode ser viável.
The experiment was conducted to evaluate the apparent metabolizable energy of different hays of northeast semiarid to Isa Label poultry line. Sixty young chickens were allocated in metallic adapted cages, distributed in a completely randomized design with five treatments and twelve repetitions. The treatments were consisted of a control ration (corn, soybean, vitamins and minerals) and the others treatments were elaborated by the substitution of 20% of this ration (kg/kg) with Calotropis procera hay, Leucaena leucocephala hay, Manihot esculenta hay and Senna obtusifolia hay according to conventional methodology for the energy evaluation of food to poultry. The L. leucocephala hay obtained the highest value of metabolizable energy (2233.69 cal/g), the S. obtusifolia hay (1882.70 cal/g) and M. esculenta hay (1812.11 cal/g) showed intermediary and next values, while C. procera hay propitied the lowest value of metabolizable energy to the chickens (809.10 cal/g). Therefore, within quantitative limits, the appropriate combination of L. leucaena, S. obtusifolia and M. esculenta hays in rations to folk avian system production can be useful.