动物营养学报2018，Vol.30Issue(2)：531-541,11.DOI:10.3969/j.issn.1006-267x.2018.02.017
玉米破碎粒度对蛋鸡生产性能、蛋品质及消化器官指数的影响
Effects of Corn Crushed Particle Size on Performance, Egg Quality and Digestive Organ Indices of Laying Hens
摘要
Abstract
This experiment was conducted to investigate the effects of corn grinding and crushing particle size on performance,egg quality and digestive organ indices of laying hens.The corn in a basal diet was ground with a hammer mill equipped with 4.0 and 8.0 mm screens in control groups,while the corn in a basal diet was crushed with a roller mill with a gap setting of 0.3,0.7,1.1 and 1.5 mm in experimental groups.A total of 1 620 thirty-week-old Hy-Line brown laying hens were selected and randomized into 6 groups with 6 replicates per group and 45 laying hens per replicate and the feeing experiment lasted for 8 weeks.The results showed that the geometric mean diameter of corn was significantly increased with the increasing of sieve diameter and gap setting (P＜0.05).The performance,dietary nutrient apparent utilization,egg quality and digestive organ indices of laying hens in crushing groups were better than those in grinding groups.When corn was ground with a hammer mill,the performance and dietary nutrient apparent utilization of hens in 8.0 mm sieve diameter group (the geometric mean diameter of corn was 1 980.00 μm) were significantly higher than those in 4.0 mm sieve diameter group (the geometric mean diameter of corn was 991.67 μm) (P＜0.05),but no significant difference were found in the egg quality and digestive organ indices of hens between them (P＞0.05).When corn was crushed with a roller mill,the performance of hens in 0.7 mm gap setting group (the geometric mean diameter of corn was 1 446.30 μm) was better than that in the other groups,and the laying rate was significantly higher than that in 8.0 mm sieve diameter group (P＜0.05),but no significant difference were found in the dietary nutrient apparent utilization,egg quality and digestive organ indices (P＞0.05).Under the condition of this study,it is concluded that corn crushed with a roller mill is better than that ground with a hammer mill in laying hens' feed,and the performance,egg quality and digestive organ indices are the best in 0.7 mm gap setting group (the geometric mean diameter of corn is 1 446.30 μm).关键词
破碎粒度/蛋鸡/生产性能/蛋品质/消化器官指数Key words
crushed particle size/laying hens/performance/egg quality/digestive organ indices分类
农业科技引用本文复制引用
杨洁,张嘉琦,李军国,秦玉昌,于治芹,李俊,牛力斌..玉米破碎粒度对蛋鸡生产性能、蛋品质及消化器官指数的影响[J].动物营养学报,2018,30(2):531-541,11.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 （）
中国农业科学院创新工程项目 （）
