Sandra Roselí Valerio Lana

Níveis de lisina digestível em rações para frangos de corte de 22 a 42 dias de idade, mantidos em ambiente de termoneutralidade

Two trials were conducted to evaluate the effects of increasing dietary digestible lysine levels, maintaining or not the amino acid relation, on performance of broilers from 22 to 42 days old on thermoneutral environment. Two hundred and ten male broilers (averaging initial weight of 662.5 g) and 168 broilers (averaging initial weight of 623.7 g) were assigned to a completely randomized experimental design in trials 1 and 2, respectively. In trial 1, the broilers were allotted to five treatments (digestible lysine levels in conventional diets) and six replicates of seven broilers. In trial 2, the broilers were allotted to four treatments (digestible lysine levels in diet maintaining amino acid relation) and six replicates of seven broilers. In both trials, linear effect of digestible lysine levels on body weight gain and feed:gain ratio were observed. In trial 1, the increasing dietary digestible lysine levels increased linearly absolute carcass weight. There was no effect of lysine levels on relative carcass weights and on absolute and relative weichts of abdominal fat. In trial 2, absolute and relative breast and thigh weights increased linearly, while the absolute drumstick data increased quadraticly up to 0.955% digestible lysine level. No treatment effects on relative drumstick weight and absolute and relative weights of abdominal fat was observed. It was concluded that male broilers, Avian Farms, in the period from 22 to 42 days old, require at least 1.015 and 1.075% digestible lysine in conventional diet or in a diet maintaining the amino acid relation, respectively. This corresponds to an intake of 28 g digestible lysine for birds on a thermoneutral environment.

Requirements of dietary digestible lysine for broilers from 22 to 42 days old on thermoneutral environment

Two trials were conducted to evaluate the effects of increasing dietary digestible lysine levels, maintaining or not the amino acid relation, on performance of broilers from 22 to 42 days old on thermoneutral environment. Two hundred and ten male broilers (averaging initial weight of 662.5 g) and 168 broilers (averaging initial weight of 623.7 g) were assigned to a completely randomized experimental design in trials 1 and 2, respectively. In trial 1, the broilers were allotted to five treatments (digestible lysine levels in conventional diets) and six replicates of seven broilers. In trial 2, the broilers were allotted to four treatments (digestible lysine levels in diet maintaining amino acid relation) and six replicates of seven broilers. In both trials, linear effect of digestible lysine levels on body weight gain and feed:gain ratio were observed. In trial 1, the increasing dietary digestible lysine levels increased linearly absolute carcass weight. There was no effect of lysine levels on relative carcass weights and on absolute and relative weichts of abdominal fat. In trial 2, absolute and relative breast and thigh weights increased linearly, while the absolute drumstick data increased quadraticly up to 0.955% digestible lysine level. No treatment effects on relative drumstick weight and absolute and relative weights of abdominal fat was observed. It was concluded that male broilers, Avian Farms, in the period from 22 to 42 days old, require at least 1.015 and 1.075% digestible lysine in conventional diet or in a diet maintaining the amino acid relation, respectively. This corresponds to an intake of 28 g digestible lysine for birds on a thermoneutral environment.

Productive performance of broiler chickens fed tomato waste

Com o objetivo de avaliar o efeito da inclusao do residuo do tomate sobre o desempenho produtivo e as caracteristicas da carcaca e dos principais cortes de frangos de corte, foi realizado um experimento com 300 pintos machos Cobb, distribuidos em delineamento inteiramente casualizado, com cinco racoes e cinco repeticoes. As dietas consistiram de uma racao-referencia a base de milho e farelo de soja e quatro racoes com 5, 10, 15 e 20% de residuo do tomate. Foram avaliados, semanalmente, o consumo de racao, o ganho de peso e a conversao alimentar e, no final do experimento, os pesos de abate, carcaca eviscerada, carcaca sem pes e cabeca, de peito, coxa, sobrecoxa, asa, dorso, visceras comestiveis e gordura abdominal, bem como seus rendimentos. O residuo de tomate aumentou o consumo de racao nos periodos de 1 a 7, 8 a 14 e 29 a 36 dias de idade, mas piorou o ganho de peso e a conversao alimentar dos frangos de corte ate 29 dias de idade. Os pesos de carcacas (g) e das partes nobres, peito, coxa e sobrecoxas diminuiram linearmente como consequencia do residuo no peso das aves nas fases pre-inicial e inicial, ou seja, ate 28 dias de idade. Os rendimentos (%) dessescortes nao foram afetados pelo uso de residuo de tomate, exceto os rendimentos de coracao e figado. O uso de residuo de tomate em racoes para frangos de corte durante o periodo de 1 a 28 dias pode diminuir o ganho de peso e piorar a conversao alimentar. O residuo de tomate pode ser utilizado em niveis de ate 20% em racoes para frangos de corte no periodo de 29 a 42 dias de idade, pois nesse nivel nao prejudica o ganho de peso nem a conversao alimentar das aves.

Exigências de metionina + cistina para frangos de corte machos de 1 a 21 e de 22 a 42 dias de idade, em clima tropical

Two experiments were conducted to determine the nutritional requirements of total methionine + cystine for Ross male broilers from 1 to 21 and 22 to 42 days old on tropical climate. The following parameters were evaluated: feed intake, weight gain, feed:gain ratio and absolute weights and yields of carcass, noble cuts (chest, thighs and drumsticks) and abdominal fat. The experiment was analyzed as a complete randomized design with six levels of methionine + cystine and four replicates of 12 animals, in a total of 288 birds for each experiment. The diets were formulated to meet the bird nutricional requirements, except for methionine + cystine levels. The diets were supplemented with DL-methionine at levels of 0, 0.08, 0.16, 0.24, 0.32, and 0.40%, resulting in experimental diets with 0.69, 0.77, 0.85, 0.93, 1.01 and 1.09% of methionine + cystine, for the period from 1 to 21 daysold and 0.61, 0.69, 0.77, 0.85, 0.93, and 1.01% of methionine + cystine, for the period from 22 to 42 days old. Quadratic effects of methionine + cystine levels on weight gain and feed:gain ratio, from 1 to 21 days old, and on feed intake, weight gain, feed:gain ratio, absolute weights of carcass and chest and yields of carcass, thighs and drumsticks, from 22 to 42 days old , were observed. According to the performance data, the nutritional requirements of methionine + cystine for male Ross broilers were estimated in 0.96 and 0.89% from 1 to 21 and 22 to 42 days old, respectively.

Exigências de metionina + cistina para frangos de corte fêmeas de 1 a 21 e de 22 a 42 dias de idade criados em região de clima tropical

Two trials were conducted to determine the requirement of methionine + cistyne for Ross female broilers from 1 to 21 and 22 to 42 days old on tropical climate region. The following parameters were evaluated: feed intake, weight gain, feed: gain ratio, absolute weights and yields of noble cuts (breast, thighs and drumsticks) and abdominal fat. The experiment was analyzed as a complete randomized design with six levels of methionine + cystineand four replicates of 12 birds per replicate, in a total of 288 birds for each experiment. The diets were formulated to meet the bird nutricional requirements, except for methionine + cystine levels. The diets were supplemented with DL-methionine at levels of 0, 0.08, 0.16, 0.24, 0.32, and 0.40% to contain 0.69, 0.77, 0.85, 0.93, 1.01, and 1.09% of methionine + cystine, for the period from 1 to 21 days and 0.61; 0.69; 0.77; 0.85; 0.93 and 1,01% of methionine + cystine, for the period from 22 to 42 days old. Quadractic effect of levels of methionine + cistyne on weight gain and feed: gain ratio, from 1 to 21 days old, and linear effect on weight gain, feed: gain ratio, absolute weights of abdominal fat, carcass, breast, thighs, and drumsticks and yields of carcass and abdominal fat, from 22 to 42 days old, were observed. According to the performance data, the nutritional requirements of methionine + cystine for female Ross broilers were estimated in 0.96%, for the periods from 1 to 21 and 22 to 42 days old.

Utilização da Silagem de Mandioca na Alimentação de Codornas

Objetivou-se com este trabalho avaliar o nivel de inclusao de silagem da raiz de mandioca na alimentacao de codornas de corte de 8 a 21 dias. Foram utilizadas 504 codornas europeias com idade inicial de oito dias distribuidas em um delineamento inteiramente casualizados. Os tratamentos consistiram de seis dietas com diferentes niveis de inclusao de silagem de mandioca (0%, 0%MSc, 5%, 10%, 15% e 20%) e 6 repeticoes cada, com 14 aves em cada gaiola. Os parâmetros analisados foram: consumo, ganho de peso e conversao alimentar. Houve efeito linear (P<0,05) para ganho de peso no periodo de 8 a 14 dias e efeito quadratico (P<0,05) para ganho de peso considerando-se o periodo de 8 a 21 dias. Recomenda-se a inclusao de 20% de silagem de mandioca na alimentacao de codornas no periodo de 8 a 21 dias de idade. DOI:10.15528/2176-4158/rcpa.v12n2p173-176

Efeito da Inclusão do Resíduo de Goiaba sobre o Rendimento de Carcaça de Codornas Japonesas (Coturnix coturnix japonica)

O objetivo da presente pesquisa foi avaliar o efeito da inclusao de diferentes niveis de residuo de goiaba sobre o rendimento de carcaca de codornas japonesas (Coturnix coturnix japonica) abatidas aos 46 dias de idade. Foram utilizadas 140 aves distribuidas em um delineamento inteiramente casualizado, sendo que os tratamentos consistiram de cinco niveis de inclusao de residuo de goiaba (0,0; 2,5; 5,0; 7,5 e 10,0%) em substituicao ao milho, com quatro repeticoes e sete aves por unidade experimental. Nao foram observadas diferencas significativas (P>0,05) dos niveis de inclusao do residuo de goiaba sobre os pesos absolutos e relativos de carcaca, peito, coxa e sobrecoxa, asas e visceras comestiveis. Quanto ao sexo as femeas obtiveram maiores (P<0,05) pesos absolutos e os machos melhores (P<0,05) pesos relativos das variaveis estudadas. De acordo com os resultados da presente pesquisa, a inclusao do residuo de goiaba em substituicao ao milho ate o nivel de 10,0% nao interferiu nos pesos absolutos e relativos de carcaca, cortes nobres e visceras comestiveis de codornas japonesas. DOI:10.15528/2176-4158/rcpa.v12n1p46-49