前后期饲粮不同粉碎粒度组合对肉鸡生长性能的影响

发布时间：2018-05-02 13:22

本文选题：粉碎粒度 + 肉鸡　；参考：《动物营养学报》2017年12期

【摘要】：本试验旨在研究不同粉碎粒度对饲料加工质量的影响以及肉鸡不同粉碎粒度饲粮对不同生长阶段肉鸡生长性能的影响。选用864只1日龄白羽爱拔益加(AA)肉鸡,随机分为6组,每组8个重复,每个重复18只鸡,进行为期42 d的饲养试验,分为前期(1~21日龄)和后期(22~42日龄)2个阶段。前、后期饲粮分别采用1.5、2.0和2.5 mm筛片孔径进行粉碎,每个筛片孔径设4个重复。前期设3个组,1.5 mm组设24个重复,2.0 mm组设16个重复,2.5 mm组设8个重复;后期设6个组,将前期1.5 mm组平均分为3个组,2.0 mm组平均分为2个组,2.5 mm组不变,每组8个重复。结果表明:1)饲料的几何平均粒径随着筛片孔径的增加而增加,其中2.5 mm组的几何平均粒径显著大于1.5和2.0 mm组(P0.05);颗粒耐久性指数(PDI)、颗粒硬度和淀粉糊化度随着筛片孔径的增加而降低,其中1.5 mm组的PDI和颗粒硬度显著大于2.0和2.5 mm组(P0.05);随着筛片孔径的增加,各组饲料的粗蛋白质体外消化率无显著差异(P0.05)。2)1~21日龄时,2.0 mm组的21日龄平均体重、平均日采食量和平均日增重均为最高。22~42日龄时,前期2.0 mm、后期2.5 mm组的42日龄平均体重和平均日增重最高,料重比最低;前期1.5 mm、后期2.5 mm组的平均日采食量最高。综合以上结果,前期2.0 mm、后期2.5 mm组的生长性能最好。所以,肉鸡前期饲粮采用筛片孔径为2.0 mm、后期饲粮采用筛片孔径为2.5 mm进行粉碎,生长性能最佳。
[Abstract]:The purpose of this experiment was to study the effect of different granularity of grinding on the quality of feed processing and the effect of different grain size of broiler on the growth performance of broilers at different growth stages. Eight hundred and sixty-four 1-day-old white feather Yiyi plus AAA broilers were randomly divided into 6 groups, 8 replicates in each group and 18 chickens in each group. The experiment was conducted for 42 days. The broilers were divided into two stages: early stage (21 days) and late stage (22 ~ 42 days). Before and after feeding, 1.5mm and 2.5 mm sieve aperture were used to comminute respectively, and each sieve aperture was repeated 4 times. Three groups were divided into 1.5 mm group, 24 replica 2.0 mm group, 16 repeat 2.5 mm group with 8 replicates, and at the later stage, 1.5 mm group was divided into 3 groups and 2.0 mm group were divided into 2 groups with 2.5 mm group and 8 repeats in each group. The results showed that the geometric mean particle size of feed increased with the increase of sieve aperture. The geometric mean particle size of 2.5 mm group was significantly larger than that of 1.5 mm and 2.0 mm group (P 0.05), and the particle durability index (PDI), particle hardness and starch gelatinization degree decreased with the increase of sieve pore size. The PDI and particle hardness of 1.5 mm group were significantly higher than that of 2.0 mm group and 2.5 mm group (P 0.05). With the increase of sieve pore diameter, there was no significant difference in vitro digestibility of crude protein in each group. The average daily intake and ADG were the highest at the age of 2.0mm in the early stage and the highest in the group of 2.5mm in the later stage, and the lowest in the group of 2.5mm in the early stage and the lowest in the group of 2.5mm in the later stage, and the highest in the group of 1.5mm in the early stage and the highest in the group of 2.5mm in the later stage. Combined with the above results, the growth performance of 2.0 mm group and 2.5 mm group was the best. Therefore, the growth performance of broiler was best when the size of sieve slice was 2.0 mm in the early diet and 2.5 mm in the later stage.
【作者单位】：中国农业科学院饲料研究所;农业部饲料生物技术重点实验室;上海新农饲料股份有限公司;中国农业科学院北京畜牧兽医研究所;
【基金】：北京市家禽产业创新团队项目(BAIC04-2017) 公益性行业(农业)科研专项“饲料高效低耗加工技术研究与示范”(201203015)
【分类号】：S831.5

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