Juliana Klug Nunes

Qualidade de ovos e resistência óssea de poedeiras alimentadas com minerais orgânicos

The effect of increasing levels of organic minerals on the external and internal quality of eggs and tibia bone strength of brown-egg laying hens was studied. A total of 256, 30-week old was equally distributed in 64 cages in a total of four birds per cage in a completely randomized experimental design. The dietary treatments consisted of inorganic or increasing levels of organic minerals in the diets of laying hens, resulting in four treatments. Egg weight (g), specific gravity, shell weight and thickness (mm), albumen height (mm), Haugh unit, yolk weight and albumen (g) and bone strength (kg) were evaluated. A significant difference (P<0.05) among treatment means for egg weight and albumen was found. Intermediate inclusion levels of organic minerals resulted in the production of heavier eggs, with higher albumen weight and maintenance of the other characteristics of internal and external quality of eggs and bone strength.

Desenvolvimento do sistema digestório de frangos de corte alimentados com farinha de batata doce

Foi avaliado o desenvolvimento do sistema digestorio de frangos de corte alimentados com farinha de batata doce em substituicao parcial ao milho, com ou sem suplementacao de um complexo enzimatico. Cento e cinquenta pintos de um dia de idade, machos, da linhagem Cobb, foram alojados em 40 boxes de duas baterias metalicas onde permaneceram ate os 28 dias de idade. O delineamento experimental foi o de blocos ao acaso em arranjo fatorial 3 x 2, com tres niveis de farinha de batata doce (0, 20 e 40%) e dois do complexo enzimatico (0 e 200 g/ton), com 5 repeticoes de 5 aves por tratamento. Aos 14, 21 e 28 dias de idade, foram pesadas e sacrificadas por deslocamento crânio-cervical, 5 aves por tratamento, para avaliacao alometrica do coracao, figado, proventriculo e moela e biometrica do duodeno, jejuno, ileo, colon-reto e cecos. Os dados foram submetidos a analise da variacao e regressao polinomial. O aumento de farinha de batata doce em substituicao ao milho na dieta de frangos de corte interfere negativamente no peso corporal e no desenvolvimento de orgaos. A suplementacao do complexo enzimatico nao in- fluencia a alometria de orgaos e a biometria intesti- nal dos frangos de corte.

Suplementação de extrato de levedura na dieta de poedeiras: qualidade de ovos

This study aimed to evaluate levels (0, 1, 2 and 3%) of yeast extract product (NuPro®) on internal and external quality of eggs. A total of 240 Hy Line W36 layers (47 to 75 weeks of age) were allocated in 60 cages (4 birds per cage) and divided into 15 cages per treatment. Egg weight, specific gravity, shell weight and thickness, albumen height, Haugh units, and yolk and albumen weight were evaluated. Data were subjected to ANOVA and polynomial regression. A p<0.05 was required for statements of significance. Specific gravity and eggshell weight were statistically influenced by dietary yeast extract. Results indicated that addition of 1.4% NuPro® resulted in better specific gravity.

Growth performance, morphometric analysis of the intestinal mucosa and thyroid of broiler fed canola meal.

Abstract: The aim of this study was to evaluate the effect of replacing soybean meal with canola meal in broiler diets on performance, liver histopathology, morphometry of the intestinal mucosa and thyroid. One-day-old Cobb chicks (n=300) were distributed in a completely randomized design, with increasing levels of replacement of soybean meal with canola meal (0, 25, 50, 75 and 100%) and 6 repetitions of 10 birds each. Weight gain decreased linearly (P< 0.05) with increasing levels of inclusion of canola meal, in all stages. Villus height in the duodenum and jejunum linearly decreased (P< 0.05). Follicle diameter and thyroid follicular epithelium height increased linearly with increasing levels of canola meal (P< 0.05). Similarly, there was an increase in relative weight of liver and heart, and liver steatosis in the highest levels of replacement. In conclusion, the replacement of soybean meal with canola meal can reduce performance, adversely affecting the thyroid, liver and the morphometric characteristics in the duodenum and jejunum. Resumo: O objetivo deste estudo foi avaliar o efeito da substituicao do farelo de soja pelo farelo de canola na dieta de frangos de corte sobre o desempenho, a histopatologia hepatica, a morfometria da mucosa intestinal e da tiroide. Foram distribuidos 300 pintos com um dia de idade em um delineamento inteiramente causualizado, com niveis crescentes de substituicao do farelo de soja pelo farelo de canola (0, 25, 50, 75 e 100%), 6 repeticoes com 10 aves cada. O ganho de peso diminuiu linearmente (P< 0,05) com niveis crescentes da substituicao, em todas as fases. Assim como, a altura das vilosidades no duodeno e jejuno diminuiu linearmente (P< 0,05) em todas as idades avaliadas. O diâmetro do foliculo e a altura do epitelio da tireoide aumentaram linearmente conforme aumentou os niveis de farelo de canola (P< 0,05). Da mesma forma, houve um aumento do peso relativo do figado e do coracao, e aparecimento de esteatose hepatica nos niveis mais altos de substituicao. Em conclusao, a substituicao do farelo de soja pelo farelo de canola pode reduzir o desempenho, afetando negativamente a tireoide, o figado e as caracteristicas morfometricas no duodeno e jejuno.

Resíduos da indústria de etanol e de biodiesel na alimentação animal

1 D.Sc., Médica Veterinária – Universidade Federal de Pelotas 2 Prof. Ph.D., Médico Veterinário – Universidade Federal de Pelotas 3 Prof. D.Sc., Médico Veterinário – Instituto Federal Sul rio-grandense Campus Pelotas – CaVG 4 Engenheira Agrônoma – Universidade Federal de Pelotas 5 M.Sc., Engenheira Agrônoma – Universidade Federal de Pelotas *Autor para Correspondência. E-mail: julianaklug@yahoo.com.br

Glucomanano esterificado e selênio orgânico em frangos alimentados com dietas com aflatoxinas

The objective of this study was to evaluate the effect of sterified glucomannan absorbent of mycotoxin and organic selenium add to corn-soy diets contaminated with aflatoxins on growth performance, carcass and cuts yield, and macroscopic lesions on visceral organs of broilers. A total of 784 broilers were subjected to a completely randomized block design, including 4 treatments and 7 replicate with 28 birds each treatment. Birds fed diets with aflatoxins and supplemented with glucomannan in combination with organic selenium, showed better weight gain and less macroscopic lesion. The use of glucomannan improved feed intake. Feed conversion, mortality, carcass yield and relative organ weight (except the liver) were not influenced by dietary treatments. These results indicate that diets with aflatoxins affect adversely growth performance, carcass characteristics and macroscopic lesion of broilers. However, the supplementation with sterified glucomannan in combination with organic selenium in diets with aflatoxins improves growth performance and decrease macroscopic lesion.

EFEITO DO ADSORVENTE A BASE DE GLUCOMAMANO ESTERIFICADO NO DESEMPENHO E CARACTERIZAÇÃO VISCERAL DE FRANGOS DE CORTE

O objetivo desse trabalho foi avaliar o efeito do uso de um adsorvente de micotoxinas constituido a base de glucomanano esterificado (GME) adicionados a dieta a base de milho e soja contaminados com aflatoxina (AF) sobre o desempenho, caracteristicas de carcaca e lesao macroscopicas de orgaos viscerais de frangos de corte. O delineamento experimental foi em blocos ao acaso, com 2 niveis de AF e 2 niveis de GME, ou seja, 4 tratamentos de 7 repeticoes com 28 aves cada, totalizando 784 aves. Aves alimentadas com dietas contendo aflatoxina apresentaram menor no ganho de peso, consumo de racao, aumento do peso relativo do baco, coracao, moela e proventriculo e maior incidencia de lesoes no baco quando comparadas com aves recebendo dietas sem contaminacao por aflatoxina . Nao houve efeito significativo do adsorvente a base de glucomanano esterificado sobre as variaveis de desempenho, caracteristicas de carcaca, peso relativo dos orgaos e percentagem de lesao macroscopica nos orgaos, com excecao da mortalidade (P dietas contaminado com aflatoxina afeta negativamente o desempenho produtivo, caracteristicas de carcaca e orgaos de frangos de corte e que a inclusao do adsorvente GME em dietas de frangos de corte contendo milho contaminado com AF nao alterou o desempenho e caracteristicas de carcaca de frangos de corte. Palavras-chave: aflatoxina , adsorvente , consumo de racao, ganho de peso, lesao macroscopica ABSTRACT The objective of this study was evaluate the effect of sterified glucomannan adsorbent of mycotoxin add to corn-soy diets contaminated with aflatoxin (AF) on growth performance, carcass characteristics, and macroscopic lesion on visceral organs of broiler chickens. A total of 784 birds were subjected to a completely randomized block design, including 4 treatments and 7 replicates with 28 birds each per treatment. The birds receiving diets contaminated with AF showed lower body weight gain, feed consumption, higher relative spleen, heart, gizzard and proventriculus weight and higher spleen lesions compared with birds receiving diets without AF. Performance, carcass characteristics, relative organ weight and macroscopic organ lesion were not affected by dietary treatments exception to mortality (P supplementation with sterified glucomannan in diets with AF no affect the performance and carcass characteristics of broilers chickens. Keywords: aflatoxin , adsorbent, feed intake, weight gain, macroscopic lesion.