肉鸡能量需要动态模型的建立和参数估计

本研究通过两个试验评价肉仔鸡的能量需要。试验1选用36只AA肉仔鸡新生雏笼养6周,分别于3周龄和6周龄评定2种饲粮的表观代谢能(AME)和表观氮校正代谢能(AMEn)。结果表明:氮校正使AME降低5%左右,AMEn和AME的相关性较强。试验2选用AA肉鸡新生雏240只,公母分饲笼养6周,每周测定空腹体重及采食量。用Compertz方程拟合公母鸡的生长曲线,微分建立日增重与日龄的函数关系,再与利用一元线性回归法建立的能量需要模型组合,形成动态的能量需要预测机制。

Dynamic Model Construction and Parameter Estimation of Energy Requirement for Broilers

Two experiments were undertaken to evaluate metabolizable energy (ME) requirement for broilers. In the first trial, 36 newborn AA chickens were reared in cages for 6 weeks. The apparent ME(AME) and nitrogen-corrected AME(AMEn) of two diets were evaluated at 3 and 6 weeks of age·Compared with AME, AMEn was decreased by 5%, and there was a great correlation between AMEn and AME. In the second trial, 240 newborn AA broiler chickens were separated to feed in cages for 6 weeks, and empty body weight and feed intake of chickens were measured weekly. The growth curves of male and female broilers were modeled using compertz equation and the relationship between daily gain and age were constructed by differential coefficient Combining the energy reguirement models constituted by the one-way linear regression method, the dynamic prediction mechanism was formed.