[1] TONG H B,LU J,ZOU J M,et al.Effects of stocking density on growth performance,carcass yield,and immune status of a local chicken breed[J].Poultry Science,2012,91(3):667-673.

[2] 白水莉,卢庆萍,张宏福,等.环境富集材料对不同饲养密度条件下肉鸡生产性能的影响[J].家畜生态学报,2009,30(3):73-76.
[3] FEDDES J J R,EMMANUEL E J,ZUIDHOF M J.Broiler performance,body weight variance,feed and water intake,and carcass quality at different stocking densities[J].Poultry Science,2002,81(6):774-779.

[4] SØRENSEN P,SU G,KESTIN S C.Effects of age and stocking density on leg weakness in broiler chickens[J].Poultry Science,2000,79(6):864-870.

[5] 贺卫华,翟晓虎,汪春雪,等.饲养密度对肉鸡生长性能、抗氧化能力和免疫功能的影响[J].中国饲料,2019(24):28-32.
[6] 厉秀梅.饲养密度与偏热环境对肉鸡骨骼和肌肉生长、氧化及肠道形态的影响[D].博士学位论文.北京:中国农业科学院,2018:1-3.
[7] 常双双,柳青秀,张敏红,等.饲养密度对肉鸡盲肠菌群多样性、挥发性脂肪酸和血清脑肠肽的影响[J].动物营养学报,2018,30(3):938-946.
[8] PETTIT-RILEY R,ESTEVEZ I.Effects of density on perching behavior of broiler chickens[J].Applied Animal Behaviour Science,2001,71(2):127-140.

[9] CRAVENER T L,ROUSH W B,MASHALY M M.Broiler production under varying population densities[J].Poultry Science,1992,71(3):427-33.

[10] HEDCERT R A,ESTEVEZ I,RUSSEK-COHEN E,et al.Effects of density and perch availability on the immune status of broilers[J].Poultry Science,2002,81(4):451-457.

[11] 殷璐瑶.饲养密度对仔鹅生长、肉用性能及福利状况的影响[D].硕士学位论文.扬州:扬州大学,2018:1-3.
[12] GURSU M F,ONDERCI M,GULCU F,et al.Effects of vitamin c and folic acid supplementation on serum paraoxonase activity and metabolites induced by heat stress
in vivo[J].Nutrition Research,2004,24(2):157-164.

[13] LAN P T N,SAKAMOTO M,BENNO Y.Effects of two probiotic
Lactobacillus strains on jejunal and cecal microbiota of broiler chicken under acute heat stress condition as revealed by molecular analysis of 16S rRNA genes[J].Microbiology and Immunology,2004,48(12):917-929.

[14] 卢营杰.笼具尺寸和饲养密度对肉鸡生产性能、免疫应激与福利状况的影响[D].硕士学位论文.太谷:山西农业大学,2016:1-3.
[15] HARTMANN G,TSCHÖP M,FISCHER R,et al.High altitude increases circulating interleukin-6,interleukin-1 receptor antagonist and c-reactive protein[J].Cytokine,2000,12(3):246-252.

[16] ALIZADEH M,RODRIGUEZ-LECOMPTE J C,YITBAREK A,et al.Effect of yeast-derived products on systemic innate immune response of broiler chickens following a lipopolysaccharide challenge[J].Poultry Science,2016,95(10):2266-2273.

[17] THOMAS D G,RAVINDRAN V,THOMAS D V,et al.Influence of stocking density on the performance,carcass characteristics and selected welfare indicators of broiler chickens[J].New Zealand Veterinary Journal,2004,52(2):76-81.

[18] 汤建平.饲养密度与饲养方式及饲粮能量对肉鸡生长的影响[D].硕士学位论文.北京:中国农业科学院,2012.
[19] GUARDIA S,KONSAK B,COMBES S,et al.Effects of stocking density on the growth performance and digestive microbiota of broiler chickens[J].Poultry Science,2011,90(9):1878-1889.

[20] 王世若,里兴龙,韩文瑜.现代动物免疫学[M].2版.长春:吉林科学技术出版社,2001.
[21] MAHMOUD K Z,EDENS F W.Influence of selenium sources on age-related and mild heat stress-related changes of blood and liver glutathione redox cycle in broiler chickens (
Gallus domesticus)[J].Comparative Biochemistry and Physiology Part B:Biochemistry and Molecular Biology,2003,136(4):921-934.

[22] 武书庚.肉仔鸡氧化应激模型的研究[D].博士学位论文.北京:中国农业科学院,2007:33-34
[23] OGANDO D G,PAZ D,CELLA M,et al.The fundamental role of increased production of nitric oxide in lipopolysaccharide-induced embryonic resorption in mice[J].Reproduction,2003,125(1):95-110.

[24] REIMUND J M,HIRTH C,KOEHL C,et al.Antioxidant and immune status in active Crohn's disease.A possible relationship[J].Clinical Nutrition,2000,19(1):43-48.

[25] KIM K C,KANG K A,ZHANG R,et al.Up-regulation of Nrf2-mediated heme oxygenase-1 expression by eckol,a phlorotannin compound,through activation of Erk and PI3K/Akt[J].International Journal of Biochemistry & Cell Biology,2010,42(2):297-305.

[26] SIES H,BERNDT C,JONES D P.Oxidative stress[J].Annual Review of Biochemistry,2017,86(1):715-748.

[27] RAMOS-GOMEZ M,KWAK M K,DOLAN P M,et al.Sensitivity to carcinogenesis is increased and chemoprotective efficacy of enzyme inducers is lost in Nrf2 transcription factor-deficient mice[J].Proceedings of the National Academy of Sciences of the United States of America,2001,98(6):3410-3415.

[28] RAVINDRAN V,THOMAS D V,MOREL P C.Performance and welfare of broilers as affected by stocking density and zinc bacitracin supplementation[J].Animal Science Journal,2006,77(1):110-116.

[29] 杨静.不同隔离时间的急性应激对鸡血液生化指标和下丘脑
CRH、
AVT mRNA表达的影响[J].广东饲料,2011,20(5):34-37.
[30] 齐晓龙.共轭亚油酸对产蛋鸡抗氧化机能的影响[D].博士学位论文.北京:中国农业科学院,2013:10-15.