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KMID : 1025520000420010045
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Journal of Animal Science and Technology
2000 Volume.42 No. 1 p.45 ~ p.54
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Study for the Development of Antibiotics - Free Diet for Growing Pigs
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Ko T. C.
Kim J. D.
Han Y. K.
Han In-Kyu
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Abstract
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An experiment was conducted to determine the effect of mannanoligosaccharide, yucca extract and β- glucan on growth performance, nutrients digestibility and amino acid digestibility and to develop antibiotics-free diet in growing pigs. A total of 150 crossbred pigs ((Landrace×Large White)×Duroc) initially averaging 19.09 kg BW were used in this experiment for 42 days. The five dietary treatments were Antifree group (negative control, basal diet), Anti group (positive control, basal diet + 0.04% chlortetracycline, CTC-125 , JEIL VET. CHEM. Co. Ltd., CTC), MOS group (basal diet + 0.1% mannanoligosaccharide, BIO-MOS , Alltech Inc.), YE group (basal diet + 0.0125% yucca extract, Fiber- gest , P. S. F Organic Inc.) and GLC group (basal diet + 0.1% β-glucan, Macrogard , Biomaczymal Co., Norway). During day 0~14, although there were no significant differences, Anti group showed numerical advantage in the average daily gain (ADG) and feed conversion ratio (FCR) compared to other treatments. During day 15~28, Anti group also showed numerical improvement in weight gain and FCR compared to other treatments. During day 29~42, Antifree group showed lower average daily feed intake (ADFI) than MOS group (P＜0.05). During day 0~42, Antifree group also showed lower ADFI than MOS group (P＜0.05). Anti group showed lower FCR than MOS group (P＜0.05).
Among all the treatments, there were no significant differences in the digestibility of dry matter, gross energy, crude protein and crude fat. However MOS group improved (P＜0.05) the phosphorus and ash digestibility.
The digestibility of essential amino acids was significantly affected (P＜0.05) by treatments except that of threonine, leucine and lysine.
The digestibility of non-essential amino acids was significantly affected by treatments except that of glutamate, alanine and total non-essential amino acid (P＜0.05).
Total feed cost per total weight gain was lower in Anti group than MOS and GLC group (P＜0.05). YE group also showed lower (P＜0.05) TFC/TWG compared to MOS and GLC groups.
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KEYWORD
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Mannanoligosaccharide, Yucca extract, β-glucan, Growth performance, Growing pigs
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