Prediction Equations Establishment of Metabolizable Energy of Corn Gluten Meal for Broilers

GUO Fangshen; YAN Fang; YANG Xiaojun; LIU Fuzhu; YANG Xin

doi:10.3969/j.issn.1006-267x.2020.03.025

Chinese Journal of Animal Nutrition >

2020 , Vol. 32 >Issue 3: 1178 - 1187

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.03.025

Prediction Equations Establishment of Metabolizable Energy of Corn Gluten Meal for Broilers

GUO Fangshen ,
YAN Fang ,
YANG Xiaojun ,
LIU Fuzhu ,
YANG Xin

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College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China

Received date: 2019-09-05

Online published: 2020-03-13

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Abstract

The objective of this experiment was to determine nutrient contents of corn gluten meal (CGM) from 6 different sources in China and its biological potency for broilers, so as to establish prediction model of metabolizable energy of CGM for broilers. Conventional nutrient contents, zein content, volume-weight and chroma of 6 CGM were measured, and its variation were analyzed. Adding 10% CGM to make experimental diets using substitution, 1-day-old Arbor Acres (AA+) broilers were selected, apparent metabolizable energy (AME), nitrogen corrected apparent metabolizable energy (AMEn), true metabolizable energy (TME) and nitrogen corrected true metabolizable energy (TMEn) of broilers were measured at 11 to 13 days of age and 25 to 27 days of age by total collection method, and regression equation between metabolizable energy of broilers and characteristics of CGM were established by stepwise regression. The results showed as follows:1) the variations of ether extract (EE), ash and neutral detergent fiber (NDF) contents of CGMs from different sources were relatively large, and coefficient of variations were 46.49%, 33.17% and 30.62%, respectively; the variations of crude protein (CP), total energy (GE) and dry matter (DM) contents were relatively small, and coefficient of variations were 6.71%, 2.13% and 1.20%, respectively. 2) The mean of AME, AMEn, TME and TMEn of broilers were 11.55, 11.13, 10.04 and 11.04 MJ/kg at 11 to 13 days of age, respectively, and the mean of AME, AMEn, TME and TMEn of broilers were 12.29, 11.74, 11.79 and 15.35 MJ/kg at 25 to 27 days of age, respectively. 3) Prediction equations of metabolizable energy of CGM for broilers established by stepwise regression model showed as follows:AME=-0.007CP+0.013b^*+0.061Ash+11.441 (R²=0.959, P=0.024), AMEn=-0.017CP+12.245 (R²=0.681, P=0.027), TME=-0.011CP+0.011b^*+10.351 (R²=0.877, P=0.020), TMEn=-0.101CP+0.101b^*+13.898 (R²=0.819, P=0.036) for 11 to 13 days of age, and TME=0.014NDF+11.618 (R²=0.646, P=0.033) at 25 to 27 days of age. Predicted values of metabolizable energy of CGM for broilers calculated by those prediction equations are very close to measured values, which indicate that prediction models of metabolizable energy of CGM for broilers are successful established.

Key words： corn gluten meal; nutrient characteristics; broilers; metabolizable energy; prediction equation

Cite this article

GUO Fangshen , YAN Fang , YANG Xiaojun , LIU Fuzhu , YANG Xin . Prediction Equations Establishment of Metabolizable Energy of Corn Gluten Meal for Broilers[J]. Chinese Journal of Animal Nutrition, 2020 , 32(3) : 1178 -1187 . DOI: 10.3969/j.issn.1006-267x.2020.03.025

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