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Articles by L. TANG
Total Records ( 1 ) for L. TANG
  L. TANG , G.-X. WANG , J. JIANG , L. FENG , L. YANG , S.-H. LI , S.-Y. KUANG and X.-Q. ZHOU
  An 8-week feeding experiment was conducted to determine the effect of dietary methionine supplementation on intestinal microflora and humoral immune of juvenile Jian carp (initial weight of 9.9±0.0g) reared in indoor flow-through and aerated aquaria. Eight amino acid test diets (350gkg−1 crude protein, CP), using fish meal, soybean-condensed protein and gelatin as intact protein sources supplemented with crystalline amino acids, were formulated to contain graded levels of methionine (0.6–22.0%) at a constant dietary cystine level of 3gkg−1. Each diet was randomly assigned to three aquaria. Growth performance and feed utilization were significantly influenced by the dietary methionine levels (P<0.05). Maximum weight gain, feed intake occurred at 12gkg−1 dietary methionine (P<0.05). Methionine supplementation improved hepatopancreas and intestine weight, hepatosomatic and intestine index, intestinal γ-glutamyltransferase and creatine kinase activity, Lactobacillus count, Bacillus count, lysozyme activities, lectin potency, sim-immunoglobulin M content, addiment C3,C4 contents and serum total iron-binding capacity and declined Escherichia coli and Aeromonas counts. Quadratic regression analysis of weight gain against dietary methionine levels indicated that the optimal dietary methionine requirement for maximum growth of juvenile Jian carp is 12gkg−1 of the dry diet in the presence of 3gkg−1 cystine.
 
 
 
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