Effects of Leucine in Low-Gossypol Cottonseed Meal Diets on Performance and Albumen Quality of Laying Hens

CHE Yanzhuo; YIN Xiaofeng; WANG Xiaocui; WANG Jing; ZHANG Haijun; QI Guanghai; SHI Zhaoguo; WU Shugeng

doi:10.3969/j.issn.1006-267x.2020.01.024

Chinese Journal of Animal Nutrition >

2020 , Vol. 32 >Issue 1: 189 - 198

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.01.024

Effects of Leucine in Low-Gossypol Cottonseed Meal Diets on Performance and Albumen Quality of Laying Hens

CHE Yanzhuo ,
YIN Xiaofeng ,
WANG Xiaocui ,
WANG Jing ,
ZHANG Haijun ,
QI Guanghai ,
SHI Zhaoguo ,
WU Shugeng

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1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
2. Key Open Laboratory of Feed Biotechnology of Ministry of Agriculture, National Engineering Research Center of Biological Feed, Feed Research Institute, The Chinese Academy of Agricultural Sciences, Beijing 100081, China;
3. College of Animal Science and Technology, Beijing Agricultural Collage, Beijing 100081, China

Received date: 2019-07-12

Online published: 2020-01-19

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Abstract

The objective of this experiment was to evaluate the effects of leucine (Leu) in low-gossypol cottonseed meal diets on performance, albumen quality and serum biochemical parameters of laying hens in peak stage. Two hundred and eighty eight healthy Hy-Line brown laying hens in peak stage at 28-week-old with the similar egg production and body weight were randomly divided into 4 groups with 6 replicates per group and 12 laying hens per replicate according to single factor completely random experimental design. All diets were isoenergical (11.11 MJ/kg), isonitrogenous (16.5% crude protein)and had the similar standard ileum digestible amino acids (SID AA) model. Laying hens in control group (SBM group) were fed a soybean meal diet, and the others in experimental groups were fed low-gossypol cottonseed meal diet (LCSM group), low-gossypol cottonseed meal and Leu (LCSM+Leu group), low-gossypol cottonseed meal and double Leu (LCSM+2Leu group). The pretest lasted for 1 week, and the experiment lasted for 12 weeks. The results showed as follows:1) compared with SBM group, egg production, average egg weight, average daily egg mass and the ratio of feed to egg of laying hens during the whole experiment period in groups LCSM, LCSM+Leu and LCSM+2Leu had no significant differences (P>0.05), and average daily feed intake during 1 to 12 weeks was significantly decreased (P<0.05). 2) Haugh unit, thick albumen weight, albumen ratio and the ratio of thick albumen to albumen among all groups during the whole experiment period had no significant differences (P>0.05). Compared with SBM group, albumen weight, dry matter weight and crude protein content of thick albumen at 12 weeks in groups LCSM, LCSM+Leu and LCSM+2Leu were significantly decreased (P<0.05). 3) The activities of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) and the contents of albumin (ALB) and uric acid (UA) in serum of laying hens among all groups during the whole experiment period had no significant differences (P>0.05). Compared with SBM group, the content of total protein (TP) in serum at 12 weeks in group LCSM+2Leu was significantly decreased (P<0.05), and the content of globulin (GLB) in serum at 12 weeks in groups LCSM and LCSM+2Leu was significantly decreased (P<0.05). It is concluded that Leu can not improve egg albumen quality decline caused by low-gossypol cottonseed meal as the only protein source of laying hens diets in peak stage.

Key words： leucine; low-gossypol cottonseed meal; performance; albumen quality

Cite this article

CHE Yanzhuo , YIN Xiaofeng , WANG Xiaocui , WANG Jing , ZHANG Haijun , QI Guanghai , SHI Zhaoguo , WU Shugeng . Effects of Leucine in Low-Gossypol Cottonseed Meal Diets on Performance and Albumen Quality of Laying Hens[J]. Chinese Journal of Animal Nutrition, 2020 , 32(1) : 189 -198 . DOI: 10.3969/j.issn.1006-267x.2020.01.024

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