动物营养学报2018，Vol.30Issue(2)：542-552,11.DOI:10.3969/j.issn.1006-267x.2018.02.018
不同玉米粉碎粒度对蛋鸡生产性能、蛋品质及消化机能的影响
Effects of Different Grinding Particle Sizes of Corn on Performance, Egg Quality and Digestive Function of Laying Hens
摘要
Abstract
This study was conducted to study the effect of different grinding particle sizes of corn on performance,egg quality and digestive function of laying hens with the same formula.The feed ingredients was ground with a hammer mill,corn was ground with 4.0,5.0,6.0,7.0,8.0 and 10.0 mm sieve diameters,respectively,and the other feed ingredients were ground with 5.0 mm sieve diameter.A total of 2 592 Roman brown laying hens at 210 days of age were randomly allocated into 6 groups with 6 replicates per group and 72 laying hens per replicate.Different groups were fed different grinding particle sizes diets.The experiment lasted for 16 weeks.The results showed as follows:1) the geometric mean diameter of corn and complete diet was increased with the sieve diameter increased,but the difference of complete diet was smaller.With the sieve diameter increased,the grinding energy consumption was decreased from 3.93 to 1.19 kW · h/t.2) With the grinding particle size of corn increasing,the average egg weight firstly increased and then decreased,the average egg weight of 5.0 mm sieve diameter group was significantly higher than that of 10.0 mm sieve diameter group (P＜0.05).With the grinding particle size of corn increasing,the broken egg rate and soft egg rate were firstly decreased and then increased,the broken egg rate of 6.0 mm sieve diameter group was significantly lower than that of 10.0 mm sieve diameter group (P＜0.05),the soft egg rate of 7.0 mm sieve diameter group was significantly lower than that of 4.0 mm sieve diameter group (P＜0.05).3) The yolk ratio of 7.0 mm sieve diameter group was significantly higher than that of 5.0 mm sieve diameter group (P＜0.05).4) The crude protein apparent digestibility of 5.0 mm sieve diameter group was significantly higher than that of 6.0,7.0,8.0 and 10.0 mm sieve diameter groups (P＜0.05),the gross energy apparent digestibility of 5.0 mm sieve diameter group was significantly higher than that of 4.0,7.0 and 10.0 mm sieve diameter groups (P＜0.05),the dry matter apparent digestibility of 7.0 mm sieve diameter group was significantly higher than that of 4.0 and 10.0 mm sieve diameter groups (P＜0.05).5) The caecal Escherichia coli number of 7.0 mm sieve diameter group was significantly lower than that of 4.0 and 10.0 mm sieve diameter groups (P＜0.05),the jejunum index of 5.0 mm sieve diameter group was significantly higher than that of 6.0,7.0 and 8.0 mm sieve diameter groups (P＜0.05),the chyme pH in proventriculus of 8.0 mm sieve diameter group was significantly lower than that of 4.0 and 5.0 mm sieve diameter groups (P＜0.05),the chyme pH in ileum of 6.0 mm sieve diameter group was significantly higher than that of 4.0,5.0,7.0 and 10.0 mm sieve diameter groups (P＜0.05).It can be concluded that aims at the diet of laying hens,6.0 mm sieve diameter for grinding corn can get the better performance and egg quality,and it is good for intestinal health of laying hens.关键词
玉米粉碎粒度/蛋鸡/粉碎能耗/生产性能/蛋品质/消化机能Key words
corn grinding particle size/laying hens/grinding energy consumption/performance/egg quality/digestive function分类
农业科技引用本文复制引用
张嘉琦,秦玉昌,李军国,李俊,牛力斌,于治芹..不同玉米粉碎粒度对蛋鸡生产性能、蛋品质及消化机能的影响[J].动物营养学报,2018,30(2):542-552,11.基金项目
现代农业产业技术体系北京市家禽创新团队项目 （）
