桂香鸡生长规律的研究

Study on Growth Law of Guixiang Chicken

为研究桂香鸡的生长规律,试验随机选取1日龄桂香鸡母鸡810只,根据相关资料报道以及生产实践的经验,分为雏鸡阶段（1～4周龄）、育成阶段（5～13周龄）、育肥阶段（14～ 17周龄）3个阶段进行饲养,测定1～17周龄的体重,运用Logistic、Gompertz和Bertalanffy 3种模型拟合其生长曲线,并对拟合结果进行比较分析.结果发现：桂香鸡全期（1～17周龄）体重变化与Bertalanffy模型拟合最好,在生产中应以Bertalanffy模型预测的各周龄体重作为指导;但在预测各阶段重要生长拐点时,以Logistic模型预测的较为准确,其预测的桂香鸡3个阶段的拐点周龄分别为3.98、9.30和12.17周龄.因此,在桂香鸡生产实践中应分4个阶段进行饲养管理,并在不同生长阶段提供相应营养水平的饲粮,以满足其生长发育需要,确保获得最佳经济效益.

In order to research the growth law of Guixiang chicken,eight hundred and ten 1-day-old hens of Guixiang chicken were randomly selected.According to relevant data reports and production practice experience,they were divided into three stages-fledging stage （1 to 4 weeks of age）,growing stage （5 to 13 weeks of age） and fattening stage （14 to 17 weeks of age） for feeding.The body weight of Guixiang chicken from 1 to 17 weeks of age was measured.Three models （Logistic,Gompertz and Bertalanffy models） were used to fit the growth curve of Guixiang chicken,and the fitting results were analyzed and compared.The results showed that the best fitting for weight change during all growth period of Guixiang chicken was Bertalanffy model and there should make each week body weight forecasted by Bertalanffy model as guidance in production.But to forecast each stage important growth inflection point,the Logistic model was more accurate.The inflection point weeks of age of Guixiang chicken at three stages which forecasted by Logistic model were 3.98,9.30 and 12.17 weeks of age,respectively.Therefore,it should be divided into four stages in production and provide the corresponding nutrient levels of diets in different growth stages in order to satisfy its growth and development and to ensure the best economic benefits.