低蛋白质氨基酸平衡饲粮对蛋鸭产蛋性能、蛋品质和脂质代谢的影响

doi:10.16431/j.cnki.1671-7236.2025.04.008

Abstract

Abstract: 【Objective】 This experiment was conducted to investigate the effects of low-protein amino acid balanced diets on laying performance,egg quality,serum biochemistry and lipid metabolism of laying ducks,providing a basis for the efficient application of low protein diets with soybean meal free in laying duck production.【Method】 Eighty healthy Longyan Shanma ducks of 21-week-old,with comparable laying performance,were selected and randomly divided into 2 groups with 4 replicates of 10 ducks each,and were housed in individual cages.The ducks from control group were fed a 16.5% crude protein (CP) diet,and ducks from the low-protein group were fed a diet with 14.5% CP,which supplemented with seven kinds of amino acids for the balance of essential amino acids.The experimental period was 12 weeks.The daily egg production,egg weight,and feed intake of each replicate was recorded for evaluating the egg production performance during the experimental period.At weeks 4,8,and 12 of the experiment,6 duck eggs were collected from each replicate,of which 4 were measured for egg quality,2 were measured for the contents of nutrient in yolk and albumin,and yolk lipid metabolism indicators.In the 12th week,two ducks were randomly selected from each replicate to collect plasma and slaughtered.The reproductive organs,abdominal fat index,and plasma and liver lipid metabolism indicators of the ducks were measured.【Result】 Compared with the control group,the average daily feed intake and average egg weight decreased by 10.51% and 2.85% (P＜0.05),respectively,egg production rate and daily egg weight were not significantly different (P＞0.05),and the feed-to-egg ratio decreased by 7.37% (P＝0.06),the relative weight of albumin increased by 3.24% (P＜0.05),and the toughness of eggshells increased by 9.70% (P＝0.06),relative weight of 3-6 mm follicles increased by 34.23% (P＜0.05) of the low-protein group.There were no significant differences between the two groups observed in egg shape index,shell strength and thickness,height of albumin,yolk color,Haugh unit,the relative weights of shell and yolk,the contents of crude protein and crude fat in yolk and albumin,number of dominant follicles,the indices of liver and abdominal lipid, serum biochemical indicators,and the contents of triglyceride and total cholesterol in liver and yolk (P＞0.05).【Conclusion】 Low protein amino acid balanced diet with soybean meal free significantly reduced the average daily feed intake and average egg weight of laying ducks,with a tendency to reduce the feed-to-egg ratio.But it did not affect the daily egg mass,egg quality,reproductive organ development and lipid metabolism of laying ducks.

Key words: low protein diet; laying duck; egg production performance; egg quality; lipid metabolism

CLC Number:

S834⁺.83

LI Mengqi, ZHENG Chuntian, CHEN Wei, JIN Chenglong, ZHANG Yanan, WANG Shuang, LI Kaichao, HUANG Xuebing, XIA Weiguang, ZHU Yuanzhao. Effects of Low Protein Amino Acid Balanced Diet on Productive Performance, Egg Quality and Lipid Metabolism in Laying Ducks[J]. China Animal Husbandry and Veterinary Medicine, 2025, 52(4): 1533-1542.

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Effects of Low Protein Amino Acid Balanced Diet on Productive Performance, Egg Quality and Lipid Metabolism in Laying Ducks

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