Effects of dietary supplementation of Acanthopanax senticosus on gastrointestinal tract development in calves.
Twenty-four newborn Holstein dairy male calves (with initial body weight of 38 ± 3.0 kg) were used in a randomized block design experiment to determine effects of dietary supplementation of Acanthopanax senticosus (AS) on gastrointestinal tract development. Calves were fed milk (10%/body weight) three times at 06.00, 12.00 and 18.00 hours daily with one to four treatments during the experimental periods (4 to 28 days): no supplementation of AS (control group, CG); 1.0 g/L•time of micro-powder AS (MP); 1.0 g/L•time of superfine powder AS (SP); or 1.0 g/L•time of coarse powder AS (CP). On days 7, 14, 21 and 28, 20 mL blood samples were collected at 06.00 hours before the morning feeding. At the end of the trial (28 days), all calves were euthanized, and tissue samples were taken and placed in 4% buffered formaldehyde for analyses. In the rumen of MP treatment, compared with the CG treatment, wall thickness and papillae diameter was both significantly lower (P<0.05), while crypt depth was significantly greater (P<0.05). In the duodenum, villi diameter of AS supplemented treatments was significantly lower than that of CG treatment (P<0.05). Results indicate that calves during sucking period supplemented with AS as MP style could promote gastrointestinal development.
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China.|Graduate University of Chinese Academy of Sciences, Beijing, China.
Zhiwei
Z
Kong
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China.|College of horticulture and landscape, Hunan Agricultural University, Changsha, China.
Hongdong
H
Jie
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China.|Hunan Co-Innovation Center of Animal Production Safety, CICAPS, Changsha, China.
Chuanshe
C
Zhou
Department of Animal Science and Technology, Jilin Agricultural University, Changchun, China.
Lianyu
L
Yang
Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China.|Hunan Co-Innovation Center of Animal Production Safety, CICAPS, Changsha, China.
Zhiliang
Z
Tan
Department of Animal Science and Technology, Jilin Agricultural University, Changchun, China.
Wenyan
W
Yang
D000821:Animal Feed; D000818:Animals; D000831:Animals, Newborn; D000833:Animals, Suckling; D002417:Cattle / Q000254:growth & development*; D004032:Diet / Q000662:veterinary*; D019587:Dietary Supplements; D028001:Eleutherococcus; D041981:Gastrointestinal Tract / Q000254:growth & development*; D008297:Male
Acanthopanax senticosus extract; IGF-I; calves; gastrointestinal development