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Effects of Feeding Levels and Particle Size of Germanium Biotite on Pig Performance

돼지 생산성에 있어 게르마늄흑운모의 첨가수준 및 입자도의 효과

  • Lee, W.B. (Dept. of Animal Resource & Sciences, Dankook University) ;
  • Kim, I.H. (Dept. of Animal Resource & Sciences, Dankook University) ;
  • Hong, J.W. (Dept. of Animal Resource & Sciences, Dankook University) ;
  • Kwon, O.S. (Dept. of Animal Resource & Sciences, Dankook University) ;
  • Min, B.J. (Dept. of Animal Resource & Sciences, Dankook University) ;
  • Shon, K.S. (Dept. of Animal Resource & Sciences, Dankook University) ;
  • Jung, Y.K. (Seobong Biobestech Co.)
  • 이원백 (단국대학교 동물자원과학과) ;
  • 김인호 (단국대학교 동물자원과학과) ;
  • 홍종욱 (단국대학교 동물자원과학과) ;
  • 권오석 (단국대학교 동물자원과학과) ;
  • 민병준 (단국대학교 동물자원과학과) ;
  • 손경승 (단국대학교 동물자원과학과) ;
  • 정연권 (서봉바이오베스텍)
  • Published : 2003.10.31

Abstract

Two experiments were conducted to investigate the effect of germanium biotite (GB) on growth performance, nutrient digestibility and fecal gas emission in pigs. In Exp 1., a total of one hundred nursery pigs (initial body weight 13.12${\pm}$0.15kg) were used in a 21 d growth assay. The five treatments were control (CON, basal diet), GB0.5-200 (basal diet + 0.5% GB, 200mesh), GB1.0-200 (basal diet + 1.0% GB, 200mesh), GB0.5-325 (basal diet + 0.5% GB, 325mesh), GB1.0-325 (basal diet + 1.0% GB, 325mesh). Each treatment had four replicates with five pigs per replicate. ADG, ADFI and gain/feed were not significantly different among the treatments. Fecal NH3-N concentration of pigs fed the GB325 diet was lower than that of pigs fed the GB200 diet (P=0.01). The GB treatments reduced fecal volatile fatty acids significantly compared to the CON (propionic acid, P=0.01; butyric acid, P=0.01; acetic acid, P=0.02). Especially, fecal propionic acid concentration of pigs fed the GB325 diets was lower than that of pigs fed the GB200 diets (P=0.02). In Exp 2., a total of seventy five pigs (initial body weight 21.18${\pm}$0.15kg) were used in a 28 d growth assay. The treatments were same as described for Exp. 1. Each treatment had five replicates with three pigs per replicate. The GB1.0 treatments significantly increased the ADG compared to the GB0.5 treatments (P=0.03). The DM and N digestibility of pigs fed the GB1.0 diets were higher than that for pigs fed the GB0.5 diets (P=0.01). Also, the Ca digestibility of pigs fed the GB diets was higher than that for pigs fed the CON diets (P=0.01). The fecal NH3-N concentrations for the GB treatments were lower than that for the CON (P=0.01). The GB325 treatments significantly decreased the fecal NH3-N concentration compared to the GB200 treatments (P=0.03). The fecal butyric acid concentration for the GB325 treatments was lower than that for the GB200 treatment (P=0.04). In conclusion, the results obtained from these feeding trials suggest that the dietary GB for nursery pigs affects fecal noxious gas emission. In growing pigs, dietary GB was effective to improve ADG and decrease fecal noxious gas emission.

Keywords

Germanium biotite;Feeding levels;Particle size;Growth;Noxious gas emission;Pigs

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