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Effects of Environmentally Friendly Agents on Growth Performance, Nutrient Digestibility, Nutrient Excretion and Carcass Characteristics in Growing-Finishing Pigs

  • Min, T.S. (Korea Science and Engineering Foundation) ;
  • Kim, J.D. (Institute of Animal Science & Technology, Seoul National University) ;
  • Hyun, Y. (Department of Animal Sciences, University of Illinois) ;
  • Sohn, K.S. (Agribrands Purina Korea Inc.) ;
  • Heo, K.N. (Department of Animal Science and Technology, College of Agriculture and Life Sciences Seoul National University) ;
  • Han, In K. (Department of Animal Science and Technology, College of Agriculture and Life Sciences Seoul National University)
  • Received : 2000.08.23
  • Accepted : 2000.11.25
  • Published : 2001.04.01

Abstract

An experiment was conducted to investigate the effects of environmentally friendly agents (yucca extract, mineral feed additive, acidifier, nonspecific immunostimulating anionic alkali solution) on the growth performance, nutrient digestibility, nutrient excretion and carcass characteristics in growing-finishing pigs. A total of 125 pigs were allotted into 5 treatments with 5 replications, 5 pigs per pen in a completely randomized block design. Dietary treatments consisted of 1) control: basal diet, 2) YE: basal diet+120 mg/kg of yucca extract, 3) MFA: basal diet+50 mg/kg of mineral feed additive, 4) NIS: basal diet+3% of NIS (nonspecific immunostimulating anionic alkali solution), and 5) Acidifier: basal diet+0.5% of acidifier (organic acid complex). During the growing phase of the feeding trial, There were no significant differences in average daily feed intake (ADFI) and feed conversion ratio (F/G) among treatments, but the Acidifier group showed higher average daily gain (ADG) than the MFA group (p<0.05). During the finishing phase, there were no significant differences in growth performance among treatments, however YE supplementation increased ADG and F/G by 3.1 and 6.15%, respectively, when compared to control group. Proximate nutrients (dry matter, DM; crude protein, CP; crude ash, CA; crude fat, CF; gross energy, GE; calcium, Ca and phosphorus, P) digestibility did not show any significant differences among the treatments. And there were no significant differences in DM, N and P excretion as well. The supplementation of environmentally friendly agents tended to increase carcass weight compared to control group. Pigs fed MFA showed significantly heavier (p<0.05) carcass weight than those fed control or Acidifier diets. Addition of these agents except for NIS to diet for growing-finishing pigs caused a similar feed cost/kg weight gain than control group. Therefore, present study suggested that the optimum environmentally friendly agent would be yucca extracts, considering the effects on growth performance, nutrient digestibility, nutrient excretion, carcass characteristics and feed cost in growing-finishing pigs.

Keywords

Pig;Yucca;Mineral Feed Additives;Acidifier;Growth Performance;Nutrient;Digestibility and Excretion;Carcass Characteristics