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ISSN : 1225-2964(Print)
ISSN : 2287-3317(Online)
Annals of Animal Resource Sciences Vol.35 No.1 pp.10-17

Effects of Ultra-weak Light on Oxidant Status and Stress in Weanling Pigs

Se Rin Park1, Jun Young Mun1, Sang Hun Ha1, Tajudeen Habeeb Temitope1, Hosseindoust Abdolreza3, Mi Jeong Park4, Jin Soo Kim2*
1Graduate student
2Professor, Department of Animal Industry Convergence, College of Animal Life Sciences, Kangwon National University, Chuncheon 24341, Korea
3Researcher, Institute of Animal Life Science, Kangwon National University, Chuncheon 24341, Korea
3Representative director, Biolight Corporation, Hanam 12982, Korea
*Corresponding author: Jin Soo Kim, Department of Animal Industry Convergence, College of Animal Life Science, Kangwon
University, Chuncheon 24341, Korea. Tel: +82-33-250-8614, E-mail:


Weaning stress is the most common issue in weanling pigs, and increases diarrhea and mortality. Various wavelengths of light irradiation affect the body owing to the association with biophotons. Biophotons are very weak photons in the visible light range generated during metabolic and chemical reactions in vivo. Immune mechanisms are activated by increasing signal transmission between cells through biophoton emission. This study evaluated the influence of ultra-weak light (LED) on growth performance, antioxidant status, and stress of weaned piglets. A total of 120 weaned pigs with an average initial body weight of 7.04±0.01 kg (age: 21 d) were allotted to two treatments (Control and LED) with 10 replicates. Diets prepared in pellet form were administered to the pigs in three phases including Phase 1 (0–14 d), Phase 2 (15–28 d), and Phase 3 (29–42 d). At the end of the study, the average daily gain (8.96%, p<0.05) and feed efficiency (6.56%, p<0.05) of pigs was significantly increased at phase 3 in the LED treatment. Low concentration of malondialdehyde (12.58%, p<0.05) and high concentrations of glutathione reductase (7.41%, p<0.01) and total antioxidant capacity (5.48%, p<0.05) were observed in the LED treatment at Day 42. The concentration of hair cortisol was also decreased (24.05%, p<0.05) in the LED treatment at Day 42. In conclusion, the use of LED for weanling pigs is recommended to improve growth performance by modulating antioxidant capacity and cortisol level in hair.

극미약광이 이유자돈의 성장과 산화효소에 미치는 영향

박세린1, 문준영1, 하상훈1, Tajudeen Habeeb Temitope1, Hossindoust Abdolreza3, 박미정4, 김진수2*
1강원대학교 동물생명과학대학 동물산업융합학과 대학원생
3강원대학교 동물생명과학연구소 연구원
4㈜바이오라이트 대표이사
2강원대학교 동물생명과학대학 동물산업융합학과 교수