Effects of Dietary Lecithin Supplemental Level on Growth Performance, Slaughter Performance, Liver Nutrient Composition and Liver and Serum Biochemical Indices of Broilers

QU Haojie; LI Xinxin; ZHANG Mingquan; WANG Xin; BAI Peng; KONG Fuli; YANG Zaibin

doi:10.3969/j.issn.1006-267x.2020.04.025

2020 , Vol. 32 >Issue 4: 1666 - 1674

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.04.025

Effects of Dietary Lecithin Supplemental Level on Growth Performance, Slaughter Performance, Liver Nutrient Composition and Liver and Serum Biochemical Indices of Broilers

QU Haojie ,
LI Xinxin ,
ZHANG Mingquan ,
WANG Xin ,
BAI Peng ,
KONG Fuli ,
YANG Zaibin

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1. College of Animal Science and Technology, Shandong Agricultural University, Taian 271018, China;
2. Beijing Libeilang Agro-Pastoral Technology Co., Ltd., Beijing 101149, China

Received date: 2019-10-17

Online published: 2020-04-16

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Abstract

This experiment was to investigate the effects of dietary lecithin supplemental level on growth performance, slaughter performance, liver nutrient composition and liver and serum biochemical indices of broilers. A total of 500 one-day-old Arbor Acres broilers with similar body weight were randomly divided into 5 groups with 10 replicates per group and 10 broilers per replicate. Broilers in the control group were fed a basal diet, and others in experimental groups were fed the basal diet supplemented with 500, 1 000, 1 500 and 2 000 mg/kg lecithin, respectively. The experiment lasted for 42 days. The results showed as follows:1) with dietary lecithin supplemental level increased, the average body weight of broilers at 21 and 42 days of age was quadratically increased (P<0.05). 2) With dietary lecithin supplemental level increased, the semi-eviscerated percentage and eviscerated percentage of broilers at 42 days of age were linearly and quadratically increased (P<0.05), and the leg muscle percentage of broilers at 42 days of age was linearly increased (P<0.05). 3) With dietary lecithin supplemental level increased, the liver organic matter content on fresh sample basis and dry matter basis of broilers at 21 days of age was linearly and quadratically increased (P<0.05 or P<0.01), and the liver organic matter and ether extract contents on fresh sample basis and dry matter basis of broilers at 42 days of age were linearly and quadratically increased (P<0.05 or P<0.01). 4) With dietary lecithin supplemental level increased, the liver total cholesterol content of broilers at 21 days of age was linearly increased (P<0.05), and the liver triglyceride content of broilers at 42 days of age was linearly and quadratically increased (P<0.01). 5) Compared with the control group, dietary supplemented 1 000, 1 500 and 2 000 mg/kg lecithin significantly decreased the serum triglyceride content of broilers at 21 and 42 days of age (P<0.05), and dietary supplemented 2 000 mg/kg lecithin significantly decreased the serum urea nitrogen content of broilers at 21 and 42 days of age (P<0.05). With dietary lecithin supplemental level increased, the contents of low density lipoprotein, triglyceride and total cholesterol in serum of broilers at 21 days of age were linearly decreased (P<0.05), and the serum triglyceride content of broilers at 42 days of age was linearly and quadratically decreased (P<0.05). The results indicate that dietary lecithin can increase the growth performance and slaughter performance of broilers, regulate liver and serum lipid metabolism, decrease the serum urea nitrogen content. Based on the average body weight of broilers, the recommended dietary lecithin supplemental levels for 1 to 21 days of age and 22 to 42 days of age broilers are 952 and 1 246 mg/kg, respectively.

Key words： lecithin; broilers; growth performance; slaughter performance; liver nutrient composition; serum biochemical indices

Cite this article

QU Haojie , LI Xinxin , ZHANG Mingquan , WANG Xin , BAI Peng , KONG Fuli , YANG Zaibin . Effects of Dietary Lecithin Supplemental Level on Growth Performance, Slaughter Performance, Liver Nutrient Composition and Liver and Serum Biochemical Indices of Broilers[J]. Chinese Journal of Animal Nutrition, 2020 , 32(4) : 1666 -1674 . DOI: 10.3969/j.issn.1006-267x.2020.04.025

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