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Effects of Inclusion Levels of Dietary Vitamins and Trace Minerals on Growth Performance and Nutrient Digestibility in Growing Pigs

  • Chae, B.J. (Division of Animal Resources, Kangwon National University) ;
  • Choi, S.C. (Division of Animal Resources, Kangwon National University) ;
  • Cho, W.T. (Department of Animal Science and Technology, Seoul National University) ;
  • Han, In K. (Department of Animal Science and Technology, Seoul National University) ;
  • Sohn, K.S. (Agribrands Purina Korea Inc.)
  • Received : 2000.02.02
  • Accepted : 2000.03.16
  • Published : 2000.10.01

Abstract

Two feeding trials were conducted to evaluate the effects of inclusion levels of dietary vitamin and trace mineral (VTM) premixes on growth and nutrient digestibility in growing pigs. A total of 112 pigs ($24.82{\pm}3.22kg$) were employed for 49 days (exp. 1), and 168 pigs ($21.64{\pm}1.41kg$) for 40 days (exp. 2) in completely randomized block designs. Treatments were: 1) 100%, 2) 150%, 3) 200% and 4) 250% NRC (1998) requirement of VTM in exp. 1, and the ratio of vitamins to trace minerals at 1) 100:100%, 2) 100:150%, 3) 150:100% and 4) 150:150% of NRC (1998) requirement in exp. 2. Basal diets for feeding trials were formulated to contain 3,310 kcal ME/kg and 18% crude protein, and contained 0.25% chromic oxide as an indigestible marker for digestibility trials. Increasing dietary VTM premix in growing pigs had linear and quadratic effects (p<0.05) on ADG, and feed conversion ratio was also improved (p<0.05) as VTM premix was increased by 150-250% of NRC (1998) requirements in exp. 1. Adding vitamin to trace mineral premixes at 150% NRC (1998) over the control improved (p<0.05) ADG and feed efficiency in growing pigs, but performances were not improved by vitamin nor by trace mineral premixes alone (p>0.15) (exp. 2). There were no differences (p>0.05) in the digestibilities of energy, crude protein and fat among dietary treatments. However, increasing dietary VTM premix in growing pigs had a linear effect (p<0.05) on the digestibilities of calcium and phosphorus. The 200 or 250% fed group showed improved (p<0.05) calcium digestibility, and 250% fed group also showed improved (p<0.05) phosphorus digestibility as compared to 100% or 150% fed group (exp. 1). The digestibilities of Ca and P were higher (p<0.05) in 150% addition of vitamins than in 150% addition of trace minerals in the diet (exp. 2).

Keywords

Vitamin and Trace Mineral Premix;Growth;Digestibility;Growing Pig

Acknowledgement

Supported by : MAF-SGRP(Ministry of Agriculture and Forestry-Special Grants Research Program)