优质鸡不同生长期采食行为性状分析

Feeding Characters at Different Growth Stages of Quality Chicken

为了探明优质鸡不同生长期的采食性状,研究以722只温氏N301公鸡的366 432个采食事件为分析对象,根据不同生长阶段、不同数量的长间隔个数把采食事件数据分为9个集合,并且用正态分布组合模型计算出顿间间隔。结果表明:(1)9个集合的顿间间隔在941~1 781 s之间,差异较大;(2)分别以集合特异性的顿间间隔、基于混合数据和基于光照时段数据计算出的顿间间隔为依据,计算并比较这9个集合个体的日均顿数后发现,基于混合数据计算出的顿间间隔1 148 s可通用于这9个集合;(3)不同生长期的采食性状差异显著,44~49日龄日均顿数(14.2)最多,而每顿持续时间(3.0 min)、每顿采食量(6.9 g)、采食率(2.6 g/min)和日均采食量(93.2 g)均处于最低值;71~77日龄日均顿数(7.5)最少,而每顿持续时间(5.2 min)最长、每顿采食量(16.8 g)最多。研究结果对优质鸡的生产有一定指导意义。

In order to figure out feeding characters at different growth stages,366 342 feeding events from 772 of N301 male quality chickens were used as research object.The pool data was divided into 9 datasets based on different growth stages and long feeding intervals,and then their meal criteria were estimated by mixed Normal distribution models.The results indicated that：（1） The meal criteria of these datasets varied between 941 to 1 148 s;（2） Daily meals for each dataset was calculated by meal criteria based on the pool data,the daytime data and each dataset itself,respectively,the results implied that 1 148 s estimated based on the pool data could be applied to these datasets;（3） There were big differences among the same feeding characters at different growth stages,daily meals（14.2） arrived at a maximal value,whereas meal duration（3.0 min）,intake per meal（6.9 g）,feeding rate（2.6 g/min） and daily intake（93.2 g） achieved the lowest level from 44 to 49 days of age.In addition,daily meals（7.5） arrived at a minimum value,whereas meal duration（5.2 min） and intake per meal（16.8 g） achieved the highest level from 71 to 77 days of age.The results had specified direction sense for production of quality chickens.