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Various levels of rapeseed meal in weaning pig diets from weaning to finishing periods

  • Do, Sung Ho (Department of Agricultural Biotechnology, College of Animal Life Sciences, Seoul National University) ;
  • Kim, Byeong Ock (Department of Agricultural Biotechnology, College of Animal Life Sciences, Seoul National University) ;
  • Fang, Lin Hu (Department of Agricultural Biotechnology, College of Animal Life Sciences, Seoul National University) ;
  • You, Dong Hyeon (Department of Agricultural Biotechnology, College of Animal Life Sciences, Seoul National University) ;
  • Hong, Jin su (Department of Agricultural Biotechnology, College of Animal Life Sciences, Seoul National University) ;
  • Kim, Yoo Yong (Department of Agricultural Biotechnology, College of Animal Life Sciences, Seoul National University)
  • Received : 2016.12.15
  • Accepted : 2017.03.21
  • Published : 2017.09.01

Abstract

Objective: This experiment was conducted to investigate the influence of rapeseed meal (RSM) supplementation in weaning pig diet on growth performance, blood profile, carcass characteristics and economic analysis on weaning to finishing pigs. Methods: A total of 120 cross bred ([Yorkshire${\times}$Landrace]${\times}$Duroc) weaning pigs were allotted to 5 treatments in a randomized complete block design. Each treatment had 4 replications with 6 pigs per pen. Five different levels of RSM (0%, 2%, 4%, 6%, and 8%) were used as dietary treatments. Results: Overall, no treatment showed significant differences in growth performance with increased dietary RSM levels. The concentration of blood urea nitrogen (BUN) decreased as dietary RSM levels increased in 6 weeks (linear response, p<0.01). Total cholesterol, high density lipoprotein cholesterol, low density lipoprotein cholesterol, triiodothyronine, and thyroxine showed no significant differences, neither were there any significant differences in the immune response (IgG and IgA). As the dietary RSM levels of weaning pig diet were increased, no differences were found among dietary treatments upon performing proximate analyses of the pork after finishing. The influence of RSM supplementation on nutrient digestibility and nitrogen retention were not affected by dietary RSM levels either. With increased dietary RSM levels in the weaning pig diet, no differences among dietary treatments were found after performing proximate analyses of the pork's physiochemical properties. In addition, there were no significant differences observed in pork colors, pH levels, and economic benefits. Conclusion: Consequently, this experiment demonstrated that weaning pig's diet containing RSM influenced BUN concentration, but there were no detrimental effects on the growth performance of weaning pigs with up to 8% RSM in the diet.

Keywords

Rapeseed Meal;Weaning Pigs;Growth Performance;Blood Profiles;Carcass Characteristics

Acknowledgement

Supported by : Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET)

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