Comparison of Substitution Method and Direct Force-Feeding Method for Evaluating Available Energy of Corn in Broilers

ZHOU Ke, LIU Guohua, NIAN Fang, CAI Huiyi, CHANG Wenhuan, ZHANG Shu

doi:10.3969/j.issn.1006-267x.2015.05.016

Chinese Journal of Animal Nutrition >

2015 , Vol. 27 >Issue 5: 1461 - 1467

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.05.016

Experimental Methods

Comparison of Substitution Method and Direct Force-Feeding Method for Evaluating Available Energy of Corn in Broilers

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1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
2. Key Laboratory of Biotechnology of Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
3. College of Natural Sciences, Gansu Agricultural University, Lanzhou 730070, China

Received date: 2014-12-15

Online published: 2015-05-13

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Abstract

This experiment was investigated to evaluate available energy of corn in Arbor Acres (AA) broilers. The experiment included two determinate methods: substitution method and force-feeding method. Substitution method selected seven hundred and four 28-day-old healthy AA broilers (half female and half male), which were randomly assigned to 11 groups (8 replicates per group, 8 broilers per replicate): control group was fed basal diet, test groups were fed 10 different kinds of corn-substitute diet (the substitute proportion was 40%), the test lasted for 7 d. Force-feeding method selected sixty healthy adult breeder broilers as test animals, randomly assigned to 5 groups (6 replicates per group, 2 broilers per replicate):10 different kinds of corn were force feeding the broilers in each groups. Follow the 48 h fasting-force feeding-48 h excretion collection operation process (GB/T 26437—2010). The results showed as follows: 1) available energy measured by force-feeding was significantly lower than those of total collect method, indicator method and terminal ileal digesta method (P<0.05). The available energy measured by total collect method, indicator method and ileal digesta method had no significant difference (P>0.05). 2) Indicator method had significant correlations with total collect method and terminal ileal digesta method at 0.01 level (two-tailed), and the correlation coefficients were 0.777 and 0.952, respectively. Total collect method had significant correlation with terminal ileal digesta method at 0.05 level (two-tailed), and the correlation coefficient was 0.683. It is concluded that the available energy evaluated by force-feeding is significantly lower than substitution method, the available energy evaluated by total collect method, indicator method and terminal ileal digesta method based on substitution method had no significant difference. The available energy evaluated by indicator method and terminal ileal digesta method, indicator method and total collect method, total collect method and terminal ileal digesta method have significant correlations (the correlation coefficients are 0.952, 0.777 and 0.683, respectively), force-feeding method has no significant correlation when compared with other three kinds of methods.

Key words： available energy; substitution method; force-feeding method; corn; broiler

Cite this article

ZHOU Ke, LIU Guohua, NIAN Fang, CAI Huiyi, CHANG Wenhuan, ZHANG Shu . Comparison of Substitution Method and Direct Force-Feeding Method for Evaluating Available Energy of Corn in Broilers[J]. Chinese Journal of Animal Nutrition, 2015 , 27(5) : 1461 -1467 . DOI: 10.3969/j.issn.1006-267x.2015.05.016

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