料型对蛋鸡生产性能的影响研究

Effect of Feed form on Performance of Layers

研究料型对蛋鸡生产性能的影响及其对蛋鸡养分代谢和肠道形态的影响。将30周龄海兰褐蛋鸡216只按每组6个重复,每个重复18只鸡随机分为2组,分别饲喂粉状料和颗粒料日粮,试验期84 d。结果表明,与颗粒料组相比,粉料组产蛋率提高4.98%(P<0.05),料蛋比、平均蛋重和采食量分别降低5.53%(P<0.05)1、.03%(P<0.05)和2.22%(P<0.05);37周龄,粉料组蛋壳厚度比颗粒料组提高3.08%(P<0.05);粉料组蛋鸡啄癖行为显著低于颗粒料组(P<0.05);粉料组蛋鸡对粗蛋白和钙的表观代谢率分别比颗粒料组提高4.30%(P<0.05)和2.62%(P<0.05);粉料组蛋鸡十二指肠的绒毛高度和绒毛高度/隐窝深度比值分别比颗粒料组增加28.14%(P<0.05)和37.62%(P<0.05)。说明粉状料通过改善小肠的形态结构和提高养分利用率,从而有效提高商品蛋鸡的生产性能、改善部分蛋品指标和减少蛋鸡的啄癖行为。

The study was conducted to investigate the effect of feed form on performance of layers, and to study the effect of feed form on nutritionalmetabolism and intestinal structure of layers. Two hundred and sixteen 30 - week - age Hyline brown hens were randomly allocated into two groups with six replicates and eighteen layers in one repli- cate. The layers were fed mash and pellet, respectively. The trial lasted for eighty - four days. The results showed that, compared to pellet group, the laying rate was increased by 4.98% （ P 〈 0.05 ） , the feed - egg ratio, average egg weight and average daily feed intake were decreased by 5.53% ,1.03% and 2.22% ,respectively （P 〈 0.05 ） ;Dur- ing thirty - seven - week - old, eggshell thickness of mash group was increased by 3.08% （P 〈 0.05 ） compared to pellet group ; When compared to pellet group, behaviors of feather peaking were decreased （ P 〈 O. 05 ） ; The apparent meta- bolic ratio of crude protein and calcium in mash group were increased by 4.30% and 2.62% compared with pellet group, respectively（ P 〈 O. 05 ） ;Compared with pellet group, increased the villus height and the ratio of V/C of the du- odenum in mash group by 28.14% and 37.62% ,respectively（P 〈0.05）. In brief,mash could＂ improve the small in- testinal morphology structure and nutrient utilization, mash could enhance the layer performance, improve part egg quality and reduce feather peaking.