文献类型： 外文期刊
第一作者： Wei, J.
作者： Wei, J.;Xie, M.;Tang, J.;Wu, Y. B.;Zhang, Q.;Hou, S. S.
作者机构：
关键词： duck feeds; enzyme hydrolysate gross energy; feasibility; correlation; requirement
期刊名称：POULTRY SCIENCE （ 影响因子：3.352； 五年影响因子：3.679 ）
ISSN：
年卷期： 2020 年 99 卷 8 期
页码：
收录情况： SCI
摘要： Two experiments were designed to investigate the feasibility of enzyme hydrolysate gross energy (EHGE) for formulating duck feeds. In experiment 1, six mixed diets and 6 experimental diets (compound feeds) with 20% CP were formulated, and their EHGE, AME, and TME were determined so as to analyze the correlation between EHGE and AME, TME. In experi-ment 2, six experimental diets with different EHGE levels were further arranged to determine the EHGE require-ment for Pekin ducks from hatch to 21 D of age. A total of 384 freshly hatched ducklings was randomly divided into 6 experimental treatments, each treatment containing 8 replicates with 8 ducks per replicate. The results showed that there were a linear correlation between EHGE and AME (r = 0.998, P < 0.01), TME (r = 0.997, P < 0.01) for 6 mixed diets, and the regression models were AME = 0.996 x EHGE-1.062 (R-2 = 0.996, P < 0.01), TME = 0.997 x EHGE+0.304 (R-2 = 0.995, P < 0.01). For the 6 experimental diets, EHGE was also positively correlated with AME (r = 0.983, P < 0.01), TME (r = 0.984, P < 0.01), and the regression models were AME = 1.2054 x EHGE-3.180 (R-2 = 0.967, P < 0.01), TME = 1.2054 x EHGE-1.783 (R-2 = 0.967, P < 0.01). According to the broken-line model and optimal BW, the EHGE requirement for ducks from hatch to 21 D of age was 2,937 kcal/kg (calculated value), 3,182 kcal/kg (determined value). In conclusion, EHGE could be used to predict the AME and TME values for mixed diets and compound feeds based on established regression models, and the simulated digestion method in vitro has the po-tential for effective energy evaluation and formulation for duck feeds.
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