Modelagem das exigências nutricionais de valina, leucina e isoleucina para codornas japonesas na fase de postura
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Data
2018-02-22
Autores
Martinez, Karla Nathaly Meza
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Universidade Estadual Paulista (Unesp)
Resumo
Objetivou-se com esta pesquisa determinar as respostas de codornas japonesas e a elaboração de modelos matemáticos para determinar o nível ótimo dessas aves à ingestão de valina, isoleucina e leucina com base no modelo fatorial. Foram realizados três ensaios experimentais, utilizando 280 codornas japonesas em fase postura para cada ensaio. Os ensaios foram delineados inteiramente ao acaso, com oito tratamentos e sete repetições compostas por cinco aves. Os tratamentos consistiram de níveis crescentes de cada aminoácido teste. Os níveis propostos de valina variaram de 0,196 a 0,941%, isoleucina de 0,170 a 0,815% e leucina de 0,392 a 1,881% dos aminoácidos teste. Esses níveis foram estabelecidos para compreender todas as exigências (mantença, resposta e estabilidade ou platô de resposta). Para cada aminoácido foi estudado um nível controle com objetivo de confirmar a limitação do respectivo aminoácido teste. O período experimental foi de sete semanas, sendo três de adaptação e as outras quatro para coleta de dados. As variáveis estudadas foram, consumo de ração (g), consumo do aminoácido teste (g/ave/dia), peso médio do ovo (g), massa de ovos (g) e peso das aves (g). As respostas de produção foram ajustadas pelo modelo broken line e a função monomolecular para elaborar o modelo fatorial que fraciona as exigências em mantença e produção de ovos, bem como calcular o nível para otimizar a massa de ovos da população. Além disso foi estimado a exigência ótima econômica de valina pelo Reading Model. O modelo broken line estimou a máxima resposta para massa de ovos de 9,49; 9,34 and 9,54 g/d para Val, Ile e Leu, respectivamente. A eficiência de utilização estimado foram 75, 65 e 55% e os valores de a determinados foram 11, 10 e 221 mg/g de para Val, Ile e Leu, respectivamente. Os valores de b determinados pela função monomolecular foram de 86, 70 e 147 mg/BWkg0,67 por dia para Val, Ile e Leu, respectivamente. A ingestão ótima econômica de valina estimada pelo Reading model foi 167 mg/ave/dia, que atenderá ao 92% da população, gerando uma margem bruta de produção de 0.0153 ave/dia.
The objective of this research was to determine the responses of Japanese quails and the elaboration of mathematical models based a factorial approach to predict the optimum intake using different levels of valine, isoleucine and leucine. Three experimental trials were carried out using 280 Japanese quails during the laying phase. The experimental design was completely randomized, with eight treatments and seven replicates composed of five birds. Treatments consisted of increasing levels of each amino acid test. Valine levels ranged from 0.196 to 0.941%, isoleucine from 0.170 to 0.815% and leucine from 0.392 to 1.881%. these levels were determined in order to analyze the utilization of these amino acids to meet the Japanese quails requirements (maintenance, response and stability or response plateau). For each amino acid trial, a control level was included in order to confirm the limitation of the respective amino acid test. The experimental period was seven weeks, being 3-week adaptation period and the other four data collection to elaborate the factorial model. The variables studied were feed intake (g), test amino acid intake (g/bird/day), egg weight (g), egg mass (g) and bird weight (g). The performance data were adjusted in the broken line and monomolecular models to determine the necessary parameters for the elaboration of the factorial model, as well as to calculate the amino acid level to optimize the egg mass of the population. The broken line model estimated the maximum response for egg output of 9.49; 9.34 and 9.54 g/day for Val, Ile and Leu, respectively. The efficiencies of utilization estimated were 75, 65 and 55% and the values of a determined were 11, 10 and 221 mg/g for Val, Ile and Leu, respectively. The values of b determined by the monomolecular function were 86, 70 and 147 mg/BWkg0.67 per day for Val, Ile and Leu, respectively. The optimal economic intake of valine estimated by Reading model was 167 mg/bird/day, which will meet 92% of the population, resulting in a gross production margin of 0.0153 bird/day.
The objective of this research was to determine the responses of Japanese quails and the elaboration of mathematical models based a factorial approach to predict the optimum intake using different levels of valine, isoleucine and leucine. Three experimental trials were carried out using 280 Japanese quails during the laying phase. The experimental design was completely randomized, with eight treatments and seven replicates composed of five birds. Treatments consisted of increasing levels of each amino acid test. Valine levels ranged from 0.196 to 0.941%, isoleucine from 0.170 to 0.815% and leucine from 0.392 to 1.881%. these levels were determined in order to analyze the utilization of these amino acids to meet the Japanese quails requirements (maintenance, response and stability or response plateau). For each amino acid trial, a control level was included in order to confirm the limitation of the respective amino acid test. The experimental period was seven weeks, being 3-week adaptation period and the other four data collection to elaborate the factorial model. The variables studied were feed intake (g), test amino acid intake (g/bird/day), egg weight (g), egg mass (g) and bird weight (g). The performance data were adjusted in the broken line and monomolecular models to determine the necessary parameters for the elaboration of the factorial model, as well as to calculate the amino acid level to optimize the egg mass of the population. The broken line model estimated the maximum response for egg output of 9.49; 9.34 and 9.54 g/day for Val, Ile and Leu, respectively. The efficiencies of utilization estimated were 75, 65 and 55% and the values of a determined were 11, 10 and 221 mg/g for Val, Ile and Leu, respectively. The values of b determined by the monomolecular function were 86, 70 and 147 mg/BWkg0.67 per day for Val, Ile and Leu, respectively. The optimal economic intake of valine estimated by Reading model was 167 mg/bird/day, which will meet 92% of the population, resulting in a gross production margin of 0.0153 bird/day.
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Palavras-chave
aminoácidos, mantença, massa de ovos, reading model, amino acids, egg mass, maintenance