Study on Estimating Metabolizable Energy of Wheat for Meat Ducks by Near Infrared Reflectance Spectroscopy

YU Mengchao, CHANG Yaqi, ZHAO Hua, CHEN Xiaoling, TIAN Gang, LIU Guangmang, CAI Jingyi, JIA Gang

doi:10.3969/j.issn.1006-267x.2018.06.033

Chinese Journal of Animal Nutrition >

2018 , Vol. 30 >Issue 6: 2294 - 2302

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.06.033

Molecular Nutrition

Study on Estimating Metabolizable Energy of Wheat for Meat Ducks by Near Infrared Reflectance Spectroscopy

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Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, China

Received date: 2017-12-09

Online published: 2018-06-20

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Abstract

This study was conducted to measured the apparent metabolizable energy (AME) of wheat for meat ducks and establish the AME predictive models of wheat by using the near infrared reflectance spectroscopy (NIRS). A total 410 one-week-old Cherry Valley meat ducks were randomly assigned to 41 treatments with 5 replicates per treatment and 2 ducks per replicate, meat ducks in the 41 treatments were fed the corn-soybean meal base diet and 40 kinds of wheat substitute diet (contained 20% wheat), respectively. The AME of wheat were measured by the substitution method, and the prediction model of wheat AME was established by NIRS. The results showed that the AME of wheat for meat ducks ranged from 11.03 to 14.34 MJ/kg, and the coefficient of variation was 5.58%. The AME of wheat was significant negative correlated with crude fiber (CF), neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents (P<0.01), however, the AME of wheat was significant positive correlated with ether extract (EE) content (P<0.01). The coefficients of determination of calibration, standard deviation of calibration and relative standard deviation of cross-validation for prediction model of AME of wheat were 0.85, 0.187 MJ/kg and 1.70%; the coefficients of determination of external validation, relative standard deviation of external validation and ratio of performance to deviation of external validation were 0.89, 1.46% and 3.23%. These results indicate that the chemical composition contents and AME are varied among different sources wheat. The AME of wheat is correlated with its chemical composition and it has a good predictive performance of wheat AME by NIRS prediction.

Key words： wheat; meat ducks; apparent metabolizable energy; near infrared reflectance spectroscopy; prediction model

Cite this article

YU Mengchao, CHANG Yaqi, ZHAO Hua, CHEN Xiaoling, TIAN Gang, LIU Guangmang, CAI Jingyi, JIA Gang . Study on Estimating Metabolizable Energy of Wheat for Meat Ducks by Near Infrared Reflectance Spectroscopy[J]. Chinese Journal of Animal Nutrition, 2018 , 30(6) : 2294 -2302 . DOI: 10.3969/j.issn.1006-267x.2018.06.033

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