Nutrient Levels of Soybean Meal Combinations in Different Ratios and Prediction Model Establishment of Metabolizable Energy for Broilers

JIANG Qiuyu; WU Wei; GUO Yuming; BAN Zhibin; ZHANG Bingkun

doi:10.3969/j.issn.1006-267x.2021.07.022

2021 , Vol. 33 >Issue 7: 3799 - 3809

DOI: https://doi.org/10.3969/j.issn.1006-267x.2021.07.022

POULTRY NUTRITION AND FEED

Nutrient Levels of Soybean Meal Combinations in Different Ratios and Prediction Model Establishment of Metabolizable Energy for Broilers

JIANG Qiuyu ,
WU Wei ,
GUO Yuming ,
BAN Zhibin ,
ZHANG Bingkun

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1. State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
2. Jilin Academy of Agricultural Sciences, Changchun 130000, China

Received date: 2021-01-08

Online published: 2021-07-06

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Abstract

The objective of this experiment was to determine the nutrient contents and metabolizable energy of 6 kinds of synthesis soybean meals that were prepared by different ratios of soybean meal and soybean hull, so as to establish the prediction model of metabolizable energy of soybean meal for broilers. A total of 1 008 one-day-old Arbor Acres roosters were selected and randomly divided into 7 groups (one of which was the hungry group), and there were 8 replicates per group and 18 chickens per replicate. The 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 from 14 to 16 days of age by total feces collection method, and regression equations between metabolizable energy of broilers and nutrients were established by stepwise regression. The results showed as follows:1) the crude protein (CP) content of the 6 kinds of synthesis soybean meals was increased gradually, while the variation coefficients of ether extract (EE), crude fiber (CF), neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents were relatively large, which were 24.65%, 42.57%, 33.86% and 45.09%, respectively. 2) The mean value of sucrose, raffinose and stachyose in carbohydrate components were 49.86, 12.88 and 42.79 g/kg, respectively. 3) The mean value of AME, AMEn, TME and TMEn of broilers in different synthesis soybean meal diets were 11.68, 11.48, 12.30 and 12.06 MJ/kg, while the mean value of AME, AMEn, TME and TMEn in different synthesis soybean meals were 11.36, 11.17, 12.74 and 12.51 MJ/kg, respectively. 3) Prediction equations of metabolizable energy by conventional nutrient contents for broilers were established as followed:AME=9.078-0.123CF+0.060CP (R²=0.982, P<0.01), AME=2.236+0.187CP-0.120EE (R²=0.911, P<0.01). Prediction equation of metabolizable energy by oligosaccharides content was established as AME=4.825+0.121CP+0.019sucrose-0.229EE (R²=0.970, P<0.01) and so on. Cross validation was used to verify the prediction equation of conventional nutrients that the predicted values of metabolizable energy are closed to measured values, which indicates that prediction models of metabolizable energy for broilers are successfully established.

Key words： broilers; synthesized soybean meal; oligosaccharides; apparent metabolizable energy; prediction equation

Cite this article

JIANG Qiuyu , WU Wei , GUO Yuming , BAN Zhibin , ZHANG Bingkun . Nutrient Levels of Soybean Meal Combinations in Different Ratios and Prediction Model Establishment of Metabolizable Energy for Broilers[J]. Chinese Journal of Animal Nutrition, 2021 , 33(7) : 3799 -3809 . DOI: 10.3969/j.issn.1006-267x.2021.07.022

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