Department of Agricultural Sciences, Tennessee State University, Nashville 37209-1561, USA.
Poult Sci. 2010 Jan;89(1):52-7. doi: 10.3382/ps.2009-00219.
This study was conducted to assess the influence of dietary CP and ME on growth parameters of the French guinea fowl, a meat-type variety. In a 2 x 3 x 3 factorial arrangement, 297 one-day-old French guinea keets (162 females and 135 males) were randomly assigned to experimental diets comprising 3,050, 3,100, and 3,150 kcal of ME/kg, each containing 21, 23, and 25% CP from hatch to 4 wk of age (WOA), and 3,100, 3150, and 3,200 kcal of ME/kg, each containing 19, 21, and 23% CP at 5 to 8 WOA. Using BW and G:F data from hatch to 8 WOA, the Gompertz-Laird growth model was employed to estimate growth patterns of the French guinea fowl. Mean differences in exponential growth rate, age of maximum growth, and asymptotic BW among dietary CP and ME levels were not significant. However, instantaneous growth rate and weight at inflection point were significantly higher (P < 0.05) in birds on the 25% CP diet than those on the 21% CP diet at hatch to 4 WOA (1.12 kg/wk and 0.79 kg vs. 1.04 kg/wk and 0.74 kg, respectively). The exponential growth rate was also higher (P < 0.05) in birds fed the 3,050 kcal of ME/kg diet with either 23 or 25% CP than those fed diets containing 3,050 kcal of ME/kg and 21% CP. Mean G:F was higher (P < 0.05) in birds fed diets containing 3,050 kcal of ME/kg and either 21 or 23% CP than those in other dietary treatments. Therefore, based on the Gompertz-Laird growth model estimates, feeding 21 and 23% CP and 3,100 kcal of ME/kg at hatch to 4 WOA and 19 and 21% CP with 3,150 kcal of ME/kg at 5 to 8 WOA can be recommended as adequate for growth for the French guinea fowl broilers.
本研究旨在评估饲粮 CP 和 ME 对肉用型法国珍珠鸡生长参数的影响。在 2×3×3 析因设计中，将 297 只 1 日龄法国珍珠鸡（公母各半）随机分配到试验饲粮中，这些饲粮的 ME 水平分别为 3050、3100 和 3150kcal/kg，CP 水平分别为 21%、23%和 25%，从孵化到 4 周龄（WOA）；ME 水平分别为 3100、3150 和 3200kcal/kg，CP 水平分别为 19%、21%和 23%，5 至 8 WOA。利用孵化至 8 WOA 的 BW 和 G:F 数据，采用 Gompertz-Laird 生长模型估计法国珍珠鸡的生长模式。饲粮 CP 和 ME 水平对指数生长率、最大生长年龄和渐近 BW 的平均差异不显著。然而，在孵化至 4 WOA 期间，25% CP 饲粮组的瞬时生长率和拐点体重显著高于 21% CP 饲粮组（分别为 1.12kg/wk 和 0.79kg 比 1.04kg/wk 和 0.74kg）。饲喂 3050kcal ME/kg 饲粮且 CP 含量为 23%或 25%的鸡的指数生长率也较高（P＜0.05），而饲喂含有 3050kcal ME/kg 和 21% CP 的饲粮的鸡则较低。饲喂含 3050kcal ME/kg 的饲粮且 CP 含量分别为 21%或 23%的鸡的平均 G:F 较高（P＜0.05），而饲喂其他饲粮处理的鸡的 G:F 较低。因此，根据 Gompertz-Laird 生长模型估计，在孵化至 4 WOA 期间，21%和 23% CP 及 3100kcal ME/kg 和 5 至 8 WOA 期间 19%和 21% CP 及 3150kcal ME/kg 可以满足法国珍珠鸡肉鸡的生长需要。
