雄性肉鸡在生长阶段对不同蛋白质和能量含量日粮的反应。

The response of male broiler chickens to diets with various protein and energy contents during the growing phase.

Pesti G M, Fletcher D L

Br Poult Sci. 1983 Jan;24(1):91-9. doi: 10.1080/00071668308416717.

Abstract

In two trials each using 2 400 male broilers, the regression of body weight on the linear effects of dietary protein, energy and age, the quadratic effect of age, and their interactions, accounted for approximately 99% of the observed variation during the growing and finishing period (3 to 8 weeks of age). Increasing either dietary protein or energy content significantly increased body weight. 2. The regression of food consumption on the linear effects of age, protein, energy and protein X energy interaction, and the quadratic effect of age accounted for 94% of the observed variation. The regression of food utilisation on the linear effects of protein, energy, and age and the quadratic effects of dietary protein and age accounted for 97% of the observed variation. Food consumption and efficiency were dependent on both dietary protein and energy, increasing with increases in either dietary protein or energy content. 3. The regression of fat in the dressed carcass on the linear effects of protein, energy and age accounted for 19% of the observed variation. Carcass fat increased with increasing age and dietary energy, and decreased with increasing dietary protein. 4. Although body weight, food consumption and utilisation were significantly different between trials, the proportion of carcass fat was not.

摘要

在两项试验中，每项试验使用2400只雄性肉鸡，体重对日粮蛋白质、能量和年龄的线性效应、年龄的二次效应及其相互作用的回归分析，解释了生长育肥期（3至8周龄）观察到的变异的约99%。增加日粮蛋白质或能量含量均显著增加体重。2. 采食量对年龄、蛋白质、能量和蛋白质×能量相互作用的线性效应以及年龄的二次效应的回归分析，解释了观察到的变异的94%。饲料利用率对蛋白质、能量和年龄的线性效应以及日粮蛋白质和年龄的二次效应的回归分析，解释了观察到的变异的97%。采食量和效率均取决于日粮蛋白质和能量，随日粮蛋白质或能量含量的增加而增加。3. 屠体脂肪对蛋白质、能量和年龄的线性效应的回归分析，解释了观察到的变异的19%。屠体脂肪随年龄和日粮能量的增加而增加，随日粮蛋白质的增加而减少。4. 尽管两次试验之间的体重、采食量和利用率存在显著差异，但屠体脂肪比例没有差异。