动物营养学报2025，Vol.37Issue(2)：999-1010,12.DOI:10.12418/CJAN2025.087
低蛋白质必需氨基酸平衡饲粮对1～30日龄清远麻鸡生长性能及肠道组织形态的影响
Effects of Low Protein Balanced Essential Amino Acid Diets on Growth Performance and Intestinal Tissue Morphology of Qingyuan Partridge Chickens Aged 1 to 30 Days
摘要
Abstract
This experiment was conducted to investigate the effects of low protein balanced essential amino acid diet on the growth performance,slaughter performance,immune organ indexes,serum biochemical indexes,apparent digestibility of nutrients and intestinal tissue morphology of Qingyuan partridge chickens aged 1 to 30 days.A total of 960 one-day-old healthy Qingyuan partridge chickens(female)were selected and divided into 4 groups with 6 replicates per group and 40 chickens per replicate.Chickens in control group were fed a corn-soybean meal basal diet(protein level was 21％),and those in three experimental groups,including groups A,B and C,were fed experimental diets(protein level was 20％,19％and 18％,respectively)with the pro-tein level reduced by 1％,2％and 3％based on the basal diet,respectively.The experimental diets added crys-tal amino acids according to the ratio of lysine,threonine,isoleucine,arginine,tryptophan,valine in the basal diet.The experiment lasted for 30 days.The results showed as follows:1)low protein balanced essential ami-no acid diet had no significant effects on the growth performance,slaughter performance,immune organ inde-xes and serum biochemical indexes of Qingyuan partridge chickens(P＞0.05).2)The apparent digestibility of crude protein,crude ash and phosphorus at 30 days of age in the group C was significantly higher than that in the control group(P＜0.05).3)The duodenal villus height in the group A was significantly higher than that in the control group(P＜0.05),the duodenal villus height/crypt depth in the three experimental groups was sig-nificantly higher than that in the control group(P＜0.05),and the jejunal villus height in the group C was sig-nificantly higher than that in the control group(P＜0.05).In conclusion,low protein balanced essential amino acid diets have no significant effects on the growth performance of Qingyuan partridge chickens from 1 to 30 days of age.Reducing dietary protein level by 1％or 2％and balancing essential amino acids can significantly improve duodenal tissue morphology of Qingyuan partridge chickens at 30 days of age.The tissue morphology of duodenum and jejunum at 30 days of age and apparent digestibility of crude protein,crude ash and phos-phorus are significantly improved by 3％reduction of dietary protein level and balance of essential amino acids.[Chinese Journal of Animal Nutrition,2025,37(2):999-1010]关键词
低蛋白质饲粮/必需氨基酸平衡/清远麻鸡/生长性能/肠道组织形态Key words
low protein diet/essential amino acid balance/Qingyuan partridge chickens/growth perform-ance/intestinal morphology分类
农业科技引用本文复制引用
欧建存,黄健,丘婷,岑明珠,郑朝军,王文河,黄威龙,张辉华..低蛋白质必需氨基酸平衡饲粮对1～30日龄清远麻鸡生长性能及肠道组织形态的影响[J].动物营养学报,2025,37(2):999-1010,12.基金项目
广东省现代农业产业技术体系创新团队项目(2023KJ128) （2023KJ128）
广东省教育厅重点建设学科科研能力提升项目(2022ZDJS040) （2022ZDJS040）
