Samara M H, Robbins K R, Smith M O
Department of Animal Science, University of Tennessee, Knoxville 37901-1071, USA.
Poult Sci. 1996 Jan;75(1):34-41. doi: 10.3382/ps.0750034.
Experiments with broiler breeder hens were undertaken to determine effect of feeding time and environmental temperature on various production variables, body weight, and feed consumption. Two temperature treatments were used: low cyclic temperature (10 to 25 C), and high cyclic temperature (21 to 39 C). The three feeding treatments were: fed one daily meal either at 0700 h (Treatment 1) or 1800 h (Treatment 2), or one-half the daily amount at 0700 h and the other half at 1800 h (Treatment 3). In another experiment, hens were assigned to feeding times of either 0700 or 1800 h. Feeding time and temperature did not markedly affect rate of egg production; however, hens at high temperature fed two meals per day produced the fewest eggs. High temperature caused significant reductions in egg weight, specific gravity, and shell thickness. Feeding time and temperature had no effect on time of oviposition, ovulation, or the transit time of the egg through the oviduct. Significant body weight loss occurred in hens at high temperature and fed at 0700 h. Both high temperature and feeding one-half of the daily feed at 0700 and the other half at 1800 h caused a reduction in feed consumption.
以肉种鸡进行试验，以确定饲喂时间和环境温度对各种生产变量、体重和采食量的影响。采用了两种温度处理：低循环温度（10至25摄氏度）和高循环温度（21至39摄氏度）。三种饲喂处理分别为：每天0700时（处理1）或1800时（处理2）饲喂一顿，或0700时饲喂一半日粮量，1800时饲喂另一半日粮量（处理3）。在另一项试验中，母鸡被分配到0700时或1800时的饲喂时间。饲喂时间和温度对产蛋率没有显著影响；然而，高温下每天饲喂两餐的母鸡产蛋量最少。高温导致蛋重、比重和蛋壳厚度显著降低。饲喂时间和温度对产卵时间、排卵或蛋在输卵管中的通过时间没有影响。高温且在0700时饲喂的母鸡体重显著减轻。高温以及在0700时饲喂一半日粮量、1800时饲喂另一半日粮量均导致采食量减少。
