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KMID : 1025520080500030321
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Journal of Animal Science and Technology
2008 Volume.50 No. 3 p.321 ~ p.330
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Effects of Dietary Biotite Powder on growth Performance, Changes in Blood Immune and Stress Related Parameters, and Fecal malodor Gas Emission in Growing Pigs
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Jang Hae-Dong
Kim Hyo-Jin
Shin Seung-Oh
Hwang Yan
Zhou Tian-Xiang
Chen Ying-Jie
Cho Jin-Ho
Jung Winston
Kim In-Ho
Kim Jin-Dong
Hong Jong-Wook
Yoo Jong-Sang
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Abstract
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This study was conducted to evaluate effects of biotite powder on growth performance, changes in blood immune and stress related parameters, and fecal malodor gas emission in growing pigs. 96 pigs[(Landrace ×Yorkshire)×Duroc, average initial body weight of 29.45±1.35kg] were used in 42d growth trial. Dietary treatments included CON(Basal diet), Solt2(Basal diet+ Biotite 0.2%), Solt4(Basal diet+Biotite 0.4%) and Solt6(Basal diet+Biotite 0.6%). The pigs were assigned to each treatment based on body weight and each treatment had 6 replicates of 4 pigs per pen in a randomized complete block design. Nitrogen digestibility was significantly higher in Solt4 treatment group than in CON and Solt2 treatment groups(Linear effect = 0.016). Gross energy in Solt4 and Solt6 treatment groups was higher than in CON treatment group(Linear effect=0.008, Quadratic effect=0.019). There were no significant differences in blood immunological(RBC, WBC, Lymphocyte and IgG) and stress related parameters(cortisol, epinephrine and norepinephrine) among treatment groups. At day 5 and day 10, hydrogen sulfide was reduced in Solt treatment groups compared to CON treatment group(day 5, Linear effect=0.009, Quadratic effect=0.037; day 10, Linear effect= 0.009). At day 5, acetic acid was significantly reduced in Solt treatments compared to CON treatment group(Linear effect<0.001, Quadratic effect<0.001). At day 15, acetic acid was significantly decreased in CON and Solt6 treatment groups compared to Solt2 and Solt4 treatment groups(Quadratic effect= 0.023). At day 5 and day 10, Solt treatment groups showed decreased total mercaptans compared to CON treatment group(day 5, Linear effect=0.029, Quadratic effect=0.037; day 10, Linear effect=0.029). For the whole experimental period, ammonia was significantly reduced in Solt2 and Solt4 treatment groups compared to CON and Solt6 treatment groups(day 5, Quadratic effect=0.038; day 10, Quadratic effect=0.045; day 15, Quadratic effect=0.038). In conclusion, biotite decreased fecal malodor gas emission in growing pigs.
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KEYWORD
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Biotite, Growth performance, Changes in blood immune, Stress related Parameters, Fecal malodor gas emission, Growing pigs
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