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Effects of stocking density on growth performance, growth regulatory factors, and endocrine hormones in broilers under appropriate environments.
Poult Sci 2019PS

Abstract

Stocking density is an important environment factor that affects the development of poultry farming, which has caused widespread concern. This study was carried out to determine the effects of stocking density on growth performance, growth regulatory factors, and endocrine hormones in broilers under appropriate environments. A total of 144 Arbor Acres male broilers (BW 1000 ± 70 g) were randomly divided into low stocking density (LSD; 6.25 birds/m2), medium stocking density (MSD; 12.50 birds/m2), and high stocking density (HSD; 18.75 birds/m2) groups, with 6 replicates in each group, and raised in 3 environmental chambers (same size) from 29-day-old to 42-day-old, respectively. The trial period lasted for 14 D with 21 ± 1°C and 60 ± 7% relative humidity, wind speed < 0.5 m/s, ammonia level<5 ppm. The results indicated that average daily food intake and average daily gain in HSD group showed significantly lower than other 2 groups (P < 0.05). Besides, the HSD group significantly reduced breast muscle yield, tibial length, tibial width, and tibial weight of broilers (P < 0.05). The HSD group increased the mRNA expression level of myostatin, and reduced the mRNA expression levels of insulin-like growth factor 1 (IGF-1) and myogenic determination factor 1 (P < 0.05). The HSD group significantly reduced the expression of parathyroid hormone-related protein in tibial growth plate (P < 0.05). The HSD group increased the serum corticosterone levels of broilers (P < 0.05), and decreased the serum IGF-1 and thyroxine (T4) levels of broiler chickens (P < 0.05) than other stocking density groups. Moreover, the serum alkaline phosphatase levels were decreased (P < 0.05) with increasing stocking density, whereas there were no significant effects on the serum 3,5,3'-triiodothyronine (T3) concentrations in 3 groups (P > 0.05). In conclusion, under appropriate environments HSD reduced the growth performance of broilers and this negative effect was likely associated with decreased growth of muscle and bone.

Authors+Show Affiliations

State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.School of Life Sciences, Hefei Normal University, Hefei 230601, China.State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31504910

Citation

Li, Xiu Mei, et al. "Effects of Stocking Density On Growth Performance, Growth Regulatory Factors, and Endocrine Hormones in Broilers Under Appropriate Environments." Poultry Science, 2019.
Li XM, Zhang MH, Liu SM, et al. Effects of stocking density on growth performance, growth regulatory factors, and endocrine hormones in broilers under appropriate environments. Poult Sci. 2019.
Li, X. M., Zhang, M. H., Liu, S. M., Feng, J. H., Ma, D. D., Liu, Q. X., ... Xing, S. (2019). Effects of stocking density on growth performance, growth regulatory factors, and endocrine hormones in broilers under appropriate environments. Poultry Science, doi:10.3382/ps/pez505.
Li XM, et al. Effects of Stocking Density On Growth Performance, Growth Regulatory Factors, and Endocrine Hormones in Broilers Under Appropriate Environments. Poult Sci. 2019 Aug 30; PubMed PMID: 31504910.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of stocking density on growth performance, growth regulatory factors, and endocrine hormones in broilers under appropriate environments. AU - Li,Xiu Mei, AU - Zhang,Min Hong, AU - Liu,Si Miao, AU - Feng,Jing Hai, AU - Ma,Dan Dan, AU - Liu,Qing Xiu, AU - Zhou,Ying, AU - Wang,Xue Jie, AU - Xing,Shuang, Y1 - 2019/08/30/ PY - 2019/04/18/received PY - 2019/08/20/accepted PY - 2019/9/11/entrez PY - 2019/9/11/pubmed PY - 2019/9/11/medline KW - broiler chicken KW - endocrine hormone KW - growth performance KW - growth regulatory factor KW - stocking density JF - Poultry science JO - Poult. Sci. N2 - Stocking density is an important environment factor that affects the development of poultry farming, which has caused widespread concern. This study was carried out to determine the effects of stocking density on growth performance, growth regulatory factors, and endocrine hormones in broilers under appropriate environments. A total of 144 Arbor Acres male broilers (BW 1000 ± 70 g) were randomly divided into low stocking density (LSD; 6.25 birds/m2), medium stocking density (MSD; 12.50 birds/m2), and high stocking density (HSD; 18.75 birds/m2) groups, with 6 replicates in each group, and raised in 3 environmental chambers (same size) from 29-day-old to 42-day-old, respectively. The trial period lasted for 14 D with 21 ± 1°C and 60 ± 7% relative humidity, wind speed < 0.5 m/s, ammonia level<5 ppm. The results indicated that average daily food intake and average daily gain in HSD group showed significantly lower than other 2 groups (P < 0.05). Besides, the HSD group significantly reduced breast muscle yield, tibial length, tibial width, and tibial weight of broilers (P < 0.05). The HSD group increased the mRNA expression level of myostatin, and reduced the mRNA expression levels of insulin-like growth factor 1 (IGF-1) and myogenic determination factor 1 (P < 0.05). The HSD group significantly reduced the expression of parathyroid hormone-related protein in tibial growth plate (P < 0.05). The HSD group increased the serum corticosterone levels of broilers (P < 0.05), and decreased the serum IGF-1 and thyroxine (T4) levels of broiler chickens (P < 0.05) than other stocking density groups. Moreover, the serum alkaline phosphatase levels were decreased (P < 0.05) with increasing stocking density, whereas there were no significant effects on the serum 3,5,3'-triiodothyronine (T3) concentrations in 3 groups (P > 0.05). In conclusion, under appropriate environments HSD reduced the growth performance of broilers and this negative effect was likely associated with decreased growth of muscle and bone. SN - 1525-3171 UR - https://www.unboundmedicine.com/medline/citation/31504910/Effects_of_stocking_density_on_growth_performance,_growth_regulatory_factors,_and_endocrine_hormones_in_broilers_under_appropriate_environments L2 - https://academic.oup.com/ps/article-lookup/doi/10.3382/ps/pez505 DB - PRIME DP - Unbound Medicine ER -