饲粮中添加膳食纤维对黄羽肉鸡屠宰性能、胫骨性能指标、粪便微生物和耐药基因的影响

doi:10.16431/j.cnki.1671-7236.2026.02.023

Abstract

Abstract:

Objective This study aimed to investigate the effects of different dietary fiber （DF） feeding regimens on slaughter performance， tibia development， gut microbiota， and antibiotic resistance genes （ARGs） in Yellow-feathered broilers. Method A total of 250 one-day-old healthy male Yellow-feathered broilers with similar initial body weight （35 g±5 g） were randomly divided into 5 groups， with 5 replicates per group and 10 broilers per replicate. The control group （CON） was fed a fiber-free basal diet （FF）. Group 1 （T1） received a low-fiber diet （LF， containing 1.5% DF）. Group 2 （T2） was fed a high-fiber diet （HF， containing 3% DF）. Group 3 （T3） was fed FF during weeks 0-4 and LF during weeks 5-8. Group 4 （T4） received LF during weeks 0-4 and HF during weeks 5-8. The experiment lasted for 56 days. At the end of the trial， blood was collected from the wing vein to determine serum calcium and phosphorus levels. Slaughter performance and tibia traits were measured， along with tibia ash， calcium， and phosphorus content. Fresh fecal samples were collected from the CON and T2 groups for metagenomic analysis. Result ①Slaughter performance： No significant differences were observed among groups in dressing percentage， semi-eviscerated yield， eviscerated yield， breast muscle yield， or leg muscle yield （P>0.05）. ②Tibia traits： There were no significant differences in tibia length， tibia weight， medullary cavity diameter， volume， or density among the groups （P>0.05）. However， compared with group T1， tibia diameter was significantly greater in groups T2 and T3 （P<0.05）， and cortical bone thickness in group T2 was significantly higher than in groups T3 and T4 （P<0.05）. No significant differences were found in tibia ash， calcium， or phosphorus content between the experimental groups and CON group （P>0.05）. ③Serum parameters： Serum calcium in groups T1， T3 and T4 was significantly higher than in CON group （P<0.05）， while serum phosphorus was significantly lower in all trial groups （P<0.05）.④Metagenomic findings： The relative abundances of fecal microbiota including Parabacteroides， Bacteroides， Clostridium， Faecalibacterium， Streptococcus， Enterococcus， Corynebacterium and Rothia in group T2 were significantly higher than in CON group （P<0.05）. Meanwhile， the relative abundances of ARGs poxtA and vatE were significantly lower in group T2 （P<0.05）. Conclusion Under the conditions of this study， the inclusion of 3% DF throughout the feeding period could improve tibia traits and gut microbiota composition， and reduce the abundance of specific antibiotic resistance genes in the feces of Yellow-feathered broilers.

Key words: Yellow-feathered broiler; dietary fiber; slaughter performance; tibia quality; fecal microbiota; antibiotic resistance genes

CLC Number:

S831.5

BI Yi, YANG Qiuyue, XIE Kan, YANG Yajin, CHEN Yanhong, LI Qingqing, GUO Aiwei. Effects of Dietary Fiber on Slaughter Performance， Tibia Performance Indicators， Fecal Microbiota， and Antibiotic Resistance Genes in Yellow-feathered Broilers[J]. China Animal Husbandry & Veterinary Medicine, 2026, 53(2): 761-775.

Figures/Tables 11

Table 1

Table 2

Table 3

Effects of dietary fiber on tibia quality parameters of Yellow-feathered broilers"

项目 Items	对照组 CON	试验1组 T1	试验2组 T2	试验3组 T3	试验4组 T4	P值 P-value
胫骨长 Tibia bone length/cm	11.42±0.09	11.48±0.16	11.27±0.11	11.49±0.10	11.54±0.14	0.623
胫骨重 Tibia bone weight/g	13.97±0.45	13.65±0.44	13.72±0.58	14.19±0.35	14.01±0.61	0.941
胫骨直径 Tibia bone diameter/mm	8.43±0.26^ab	8.04±0.23^b	8.93±0.16^a	8.89±0.23^a	8.51±0.20^ab	0.045
髓腔直径 Medullary canal diameter/mm	5.18±0.18	5.31±0.17	5.58±0.16	5.56±0.35	5.68±0.27	0.504
胫骨体积 Tibia bone volume/cm³	12.33±0.37	11.89±0.46	12.55±0.55	12.73±0.39	12.73±0.62	0.747
皮质厚度 Cortical thickness/mm	1.66±0.04^ab	1.57±0.07^ab	1.74±0.04^a	1.49±0.06^bc	1.48±0.06^bc	0.022
胫跗骨指数 Tibiotarsal index/%	39.09±1.25	37.15±1.21	38.53±0.94	34.66±1.61	34.43±1.63	0.074
强健指数 Robusticity index/（mm/ $m g 3$ ）	4.75±0.06	4.81±0.05	4.72±0.03	4.75±0.06	4.79±0.02	0.750
骨重/骨长指数 W/L index/（mg/mm）	122.33±4.00	118.77±2.97	121.34±4.16	123.59±3.58	121.02±3.93	0.923
胫骨密度 Tibia bone density/（g/cm³）	1.13±0.02	1.15±0.01	1.10±0.02	1.12±0.02	1.16±0.03	0.333

Table 3

Fig.1

Table 4

Table 5

Fig.2

Table 6

Fig.3

Fig.4

Fig.5

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项目 Items	0~4周龄 0 to 4 weeks of age					5~8周龄 5 to 8 weeks of age
项目 Items	CON	T1	T2	T3	T4	CON	T1	T2	T3	T4
原料 Ingredients
玉米 Corn	57.06	55.19	53.32	57.06	55.19	64.48	62.62	60.93	62.62	60.93
豆粕 Soybean meal	28.45	28.82	29.20	28.45	28.82	20.73	21.09	21.17	21.09	21.17
鱼粉 Fish meal	5.10	5.10	5.10	5.10	5.10	5.20	5.20	5.31	5.20	5.31
玉米蛋白粉 Corn gluten meal	2.00	2.00	2.00	2.00	2.00	2.00	2.00	2.00	2.00	2.00
微晶纤维素 Microcrystalline fiber	0.00	1.00	2.00	0.00	1.00	0.00	1.00	2.00	1.00	2.00
菊粉 Inulin	0.00	0.50	1.00	0.00	0.50	0.00	0.50	1.00	0.50	1.00
豆油 Soybean oil	2.70	2.70	2.70	2.70	2.70	3.10	3.10	3.16	3.10	3.16
L-赖氨酸 L-Lys	0.14	0.14	0.13	0.14	0.14	0.15	0.15	0.15	0.15	0.15
DL-蛋氨酸 DL-Met	0.15	0.15	0.15	0.15	0.15	0.14	0.14	0.14	0.14	0.14
石粉 Limestone	1.50	1.50	1.50	1.50	1.50	1.50	1.50	1.50	1.50	1.50
磷酸氢钙 CaHPO₄	1.27	1.27	1.27	1.27	1.27	1.27	1.27	1.21	1.27	1.21
食盐 NaCl	0.37	0.37	0.37	0.37	0.37	0.23	0.23	0.23	0.23	0.23
预混料 Premix^①	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00
氯化胆碱 Choline chloride	0.26	0.26	0.26	0.26	0.26	0.20	0.20	0.20	0.20	0.20
营养成分 Nutrient components^②
代谢能 ME/（MJ/kg）	12.44	12.42	12.40	12.44	12.42	12.83	12.81	12.82	12.81	12.82
粗蛋白质 CP	21.51	21.51	21.51	21.51	21.51	18.90	18.90	18.86	18.90	18.86
赖氨酸 Lys	1.32	1.33	1.32	1.32	1.33	1.15	1.15	1.16	1.15	1.16
蛋氨酸 Met	0.53	0.53	0.53	0.53	0.53	0.49	0.49	0.49	0.49	0.49
钙 Ca	1.01	1.01	1.01	1.01	1.01	0.99	0.99	0.99	0.99	0.99
有效磷 AP	0.48	0.48	0.48	0.48	0.48	0.48	0.48	0.47	0.48	0.47

项目 Items	对照组 CON	试验1组 T1	试验2组 T2	试验3组 T3	试验4组 T4	P值 P-value
屠宰率 Dressed percentage	72.47±0.72	71.21±0.55	72.31±0.52	72.02±0.35	70.84±0.48	0.135
半净膛率 Percentage of half-eviscerated yield with giblet	85.51±0.37	85.04±0.98	86.12±0.75	85.57±0.39	85.20±0.51	0.799
全净膛率 Percentage of eviscerated yield	71.72±0.77	70.56±0.76	72.72±0.61	72.03±0.35	70.83±0.48	0.109
胸肌率 Percentage of breast muscle yield	15.54±0.31	16.07±0.51	14.89±0.35	15.15±0.58	14.61±0.38	0.173
腿肌率 Percentage of leg muscle yield	14.53±0.52	14.25±0.58	14.36±0.42	14.36±0.42	15.58±0.57	0.312

项目 Items	对照组 CON	试验2组 T2	P值 P-value
Chao1指数 Chao1 index	1 063±79	1 028±83	0.811
Ace指数 Ace index	1 127±87	1 089±92	0.783
香侬指数 Shannon index	5.12±0.18	5.36±0.15	0.381
辛普森指数 Simpson index	0.89±0.02	0.91±0.01	0.424

Effects of Dietary Fiber on Slaughter Performance， Tibia Performance Indicators， Fecal Microbiota， and Antibiotic Resistance Genes in Yellow-feathered Broilers

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[2]	Qi LUO, Dingbiao LONG, Jing WANG, Rong XIAO, Qi WANG. Effects of Rare Earth-chitosan Chelate on Growth Performance， Digestibility of Nutrients， Serum Indices and Fecal Microbiota of Growing-finishing Pigs [J]. China Animal Husbandry & Veterinary Medicine, 2026, 53(2): 787-797.
[3]	Li TANG, Min ZHANG, Jun LI, Jinni LIU, Kaiwei DENG, Chengcheng LIANG, Shuhai HE, Haigang WU, Hui CHEN, Yifan LI, Qimeng GONG, Dongke WU. Effects of Green Tea Aqueous Extract on Slaughter Performance， Meat quality and Serum Biochemical Indices of Cyan-shank Partridge Chickens [J]. China Animal Husbandry & Veterinary Medicine, 2026, 53(2): 798-809.
[4]	QIN Yimeng, CUI Tao, WANG Jianing, ZHANG Yanlei, WU Shuqin, SUN Quanwen, MA Xunping, ZHAO Yueping. Effects of Millet Replacing Part Corn on Slaughter Performance,Meat Quality, Serum Immune and Antioxidant Index of Ira Rabbits [J]. China Animal Husbandry & Veterinary Medicine, 2025, 52(8): 3584-3594.
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