Effects of Soybean Meal Particle Size on Performance, Egg Quality and Digestive Organ Indices of Laying Hens

WU Yushan; WANG Qinhui; LIU Chuanhui; LI Junguo; LI Jun; XUE Yong; YANG Jie

doi:10.3969/j.issn.1006-267x.2019.08.020

Chinese Journal of Animal Nutrition >

2019 , Vol. 31 >Issue 8: 3590 - 3599

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.08.020

Effects of Soybean Meal Particle Size on Performance, Egg Quality and Digestive Organ Indices of Laying Hens

WU Yushan ,
WANG Qinhui ,
LIU Chuanhui ,
LI Junguo ,
LI Jun ,
XUE Yong ,
YANG Jie

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1. Feed Processing Innovation Team, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. Yunnan Testing & Inspection Institute for Veterinary Drugs & Feedstuff, Kunming 650201, China;
3. Shangqiu Livestock Products Quality Inspection Testing Center, Shangqiu 476000, China;
4. Key Open Laboratory of Feed Biotechnology, Ministry of Agriculture, Beijing 100081, China;
5. Changping District Animal Disease Control Center, Beijing 102200, China

Received date: 2019-01-24

Online published: 2019-08-19

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Abstract

This experiment was conducted to investigate the effects of different soybean meal particle sizes on performance, egg quality and digestive organ indices of laying hens. The crushing granularity of soybean meal crushed by hammer-chip pulverizer in diet was set as five crushing groups with sieve apertures of 4.00, 5.00, 6.00, 7.00 and 8.00 mm, respectively, and one non-crushing group with sieve size of 6.00 mm. The other feed ingredients were processed in the same way. A total of 2 592 Hyline brown laying hens of 210-day-old were selected and randomized into 6 groups with 6 replicates per group and 72 laying hens per replicate. The experiment lasted for 8 weeks. The results showed that the geometric mean particle size of soybean meal in crushing groups increased significantly with the increasing of the grinding mesh size (P<0.05), and which was smaller than that in non-crushing group with sieve size of 6.00 mm (P<0.05). Meanwhile, the granularity distribution was also different. The performance, egg quality and digestive organ indices of laying hens in the crushing groups were better than those in the non-crushing group with sieve size of 6.00 mm. After the soybean meal was crushed by hammer mill, the soybean meal particle size had no significant effects on the performance, egg quality and digestive organ indices of laying hens (P>0.05), but the performance, egg quality and digestive organ indices of laying hens in 5.00 mm sieve diameter group with 732.00 μm geometric mean particle size were better than those in the other groups. It is concluded that the performance, egg quality and digestive organ indices of laying hens are the best when the soybean meal is ground with a hammer mill equipped with 5.00 mm screen for laying hens' diet (the geometric mean particle diameter of soybean meal is 732.00 μm).

Key words： soybean meal; particle size; laying hens; performance; egg quality; digestive organ indices

Cite this article

WU Yushan , WANG Qinhui , LIU Chuanhui , LI Junguo , LI Jun , XUE Yong , YANG Jie . Effects of Soybean Meal Particle Size on Performance, Egg Quality and Digestive Organ Indices of Laying Hens[J]. Chinese Journal of Animal Nutrition, 2019 , 31(8) : 3590 -3599 . DOI: 10.3969/j.issn.1006-267x.2019.08.020

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