Correlation between chemical composition, EHGE and TME of corn for ducks
2020
Chen, Y.J.(Huazhong Agricultural University College of Animal Science & Technology ,Inner Mongolia Agricultural University Vocational and Technical College ,Inner Mongolia Agricultural University College of Animal Science) | Wang, Z.Y.(Inner Mongolia Agricultural University College of Animal Science) | Du, C.G.(Inner Mongolia Agricultural University Vocational and Technical College ,Inner Mongolia Agricultural University College of Animal Science) | Qi, Z.L.(Huazhong Agricultural University College of Animal Science & Technology) | Guo, Y.Q.(Inner Mongolia Agricultural University Vocational and Technical College) | Shen, X.H.(Inner Mongolia Agricultural University Vocational and Technical College) | Guo, Z.K.(Inner Mongolia Agricultural University Vocational and Technical College) | Zhang, C.(Inner Mongolia Agricultural University Vocational and Technical College) | Zhang, Y.F.(Huazhong Agricultural University College of Animal Science & Technology) | Yang, H.M.(Huazhong Agricultural University College of Animal Science & Technology)
Correlations between chemical composition, enzymatic hydrolysate gross energy (EHGE), and true metabolizable energy (TME) of corn for ducks were investigated. Twenty-two corn samples were collected from various regions in 11 provinces of China. The crude protein (CP), ether extract (EE), neutral detergent fibre (NDF), Ash, gross energy (GE), dry matter (DM), amylopectin (AP), amylose (AM), total starch (TS), and AP/AM were determined for each sample. Five of the samples of corn were chosen at the mean, mean ± 1 standard deviation (SD), and mean ± 2 SD based on AP/AM. The EHGE of these samples was analysed using the pepsin-artificial small intestinal fluid enzymatic method. These five samples were also force-fed to male Cherry Valley ducks to assay their TME. Finally, correlation analyses were performed, and regression equations were established. Ash content, GE, and TS were highly related to EHGE. Univariate prediction equations were EHGE = 11.8566Ash 00421 (P <0.05), EHGE = 0.1535GE15642 (P <0.05), and EHGE = 0.1020TS11561 (P <0.05). The total starch, AP/AM, and ash of the chemical compositions were highly related to TME. The corresponding univariate regression equations were TME = 21.9355TS-00910 (P <0.05), TME = 15.6590AP/AM-00559 (P <0.05), and TME = 15.0778Ash00442 (P <0.05). The mean EHGE was equivalent to 78.5% of TME, but their correlation coefficient was low. In conclusion, chemical composition was predictive of EHGE and TME of corn samples for ducks, but the correlation of EHGE and TME was low.
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