种鸽饲粮粗蛋白质水平对乳鸽生长性能、屠宰性能及肠道菌群结构的影响

doi:10.16431/j.cnki.1671-7236.2025.01.010

Abstract

Abstract: 【Objective】 The objective of this experiment was to investigate the effects of dietary protein level on growth,slaughter performance,intestinal microflora and structure of squabs under the "2+2" production mode (1 pair of parent pigeons feeding 2 squabs in 1 breeding cycle). 【Method】 60 pairs of healthy Tarim breeding pigeons aged 12-18 months,with similar reproductive performance,were randomly divided into 5 groups,with 12 pairs in each group,and each pair bred 2 squabs. The breeder pigenons were fed diets with energy level of 12.64 MJ/kg and different crude protein (CP) levels (12%,13%,14%,15% and 16%),respectively.The experiment had a 3-day pre-experimental period and a 28-day experimental period.The body weight of squabs was measured every 3 days,and 8 squabs in each group were slaughtered at 28 days of age,and their slaughter performance and jejunal microbial community structure were measured. 【Result】 ① Dietary protein level had significant effects on body weight and average daily gain of squabs (P＜0.05).The body weight of squabs increased linearly with the increase of day age,and the average daily gain of squabs first decreased and then increased,showing a quadratic curve change (P＜0.05).The average daily gain of squabs in CP13% group was the largest.② Dietary protein level had significant effects on the slaughter rate,abdominal fat rate,breast muscle rate and wing rate of squabs (P＜0.05),and the slaughter rate of CP16% group was significantly higher than that of CP13% and CP14% groups (P<0.05).③ At the phylum level,the top ten in each group were Actinomyces,Firmicutes,TM7,Cyanobacteria,Proteobacteria,Bacteroidetes,Parasicutes,OP11,Chloromyces and Blastomonas.The relative abundance of Proteobacteria in CP16% group was significantly higher than that in CP14% and CP15% groups (P＜0.05).At the family level,the top ten species in each group were Corynebacteriaceae,Lactobacillaceae,Rhodiaceae,Clostridiaceae,Erysipelothriaceae,Enterococcaceae,Veillonaceae,actinomyceaceae,Bifidobacteriaceae and Rs-045.The relative abundance of Rhodiaceae in CP14%,CP15% and CP16% groups was significantly higher than that in CP12% group (P＜0.05).The relative abundance of Bifidobacteriaceae in CP14% and CP16% groups was significantly higher than that in CP12% and CP13% groups (P＜0.05).At the genus level,the top ten in each group were Corynebacterium,Lactobacillus,Strangella,Segmental filamentous bacterium,Enterococcus,Veyronella,Bifidobacterium,Breidella,Actinomyces and Kinetocampylobacter,and the relative abundance of Bifidobacterium in CP14% and CP16% groups was significantly higher than that in CP12% and CP13% groups (P＜0.05).The relative abundance of Strangella in CP15% and CP16% groups was significantly higher than that in CP12% group (P＜0.05).The relative abundance of Veillonella in CP16% group was significantly higher than that in CP12% group (P＜0.05). 【Conclusion】 Under the conditions of this experiment,the average daily weight gain of squabs was the highest when the crude protein level in the diet for breeder pigeons in the "2+2" production mode was 13%,and the slaughter performance was better.Different crude protein levels in the diet for breeder pigeons had a certain effect on the jejunal microbiota structure of squabs at 28 days old.A crude protein level of 13% in the diet for breeder pigeons was more suitable for the growth performance of squabs.

Key words: Tarim pigeons; protein level; growth performance; slaughter performance; microbiota structure

CLC Number:

S863

WANG Jing, LIANG Guichen, FU Rui, WANG Zewu, ZANG Changjiang, LI Fengming. Effects of Dietary Crude Protein Level on Growth and Slaughtering Performance and Intestinal Microflora Structure of Squabs[J]. China Animal Husbandry & Veterinary Medicine, 2025, 52(1): 107-120.

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Effects of Dietary Crude Protein Level on Growth and Slaughtering Performance and Intestinal Microflora Structure of Squabs

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