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Anim Biosci > Accepted Articles
https://doi.org/10.5713/ab.22.0001    [Accepted] Published online June 24, 2022.
Net energy and its establishment of prediction equations for wheat bran in growing pigs
Zhiqian Lyu1,2  , Yifan Chen3  , Fenglai Wang1  , Ling Liu1  , Shuai Zhang1  , Changhua Lai1,* 
1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
2Hebei Agricultural University, Baoding 071000, China
3Guangdong HAID Group Co., Ltd., Guangzhou, 511446, China
Correspondence:  Changhua Lai, Tel: +86-10-62734403, Fax: +86-10-62734403, Email: laichanghua999@163.com
Received: 31 December 2021   • Revised: 3 February 2022   • Accepted: 3 May 2022
Abstract
Objective
The objective of this experiment was to determine the net energy (NE) value of 6 wheat bran and 1 wheat shorts by indirect calorimetry and establish the NE prediction equations of wheat bran fed to growing barrows.
Methods
Forty-eight growing barrows (28.5±2.4 kg body weight) were allotted in a completely randomized design to 8 dietary treatments that included a corn-soybean meal basal diet, 6 wheat bran diets and 1 wheat shorts diet. The inclusion level of wheat bran or wheat shorts in diets is 30%.
Results
The addition of wheat bran reduced the apparent total tract digestibility (ATTD) of nutrients (p<0.05). The ATTD of gross energy, crude protein (CP) and dry matter (DM) in the wheat shorts were greater than that in the wheat bran. Addition of wheat bran or wheat shorts had no effect on total heat production and fasting heat production. The net energy (NE) of wheat bran was negatively correlated with neutral detergent fiber (r = –0.84; p<0.05) and acid detergent fiber (r = –0.83; p<0.05), while it was positively correlated with CP (r = 0.92; p<0.01). The NE values of wheat bran ranged from 6.79 to 8.15 MJ/kg DM, and the NE value of wheat shorts was 12.47 MJ/kg DM. The ratio of NE to metabolizable energy for wheat bran fed to growing pigs was from 66.0 to 71.7%, whereas the value for wheat shorts was 83.7%.

Conclusion

The NE values of wheat bran ranged from 6.79 to 8.15 MJ/kg DM, and the NE value of wheat shorts was 12.47 MJ/kg DM. The NE value of wheat bran can be well predicted based on energy content and proximate analysis.
Keywords: Growing Pig; Heat Production; Net Energy; Prediction Equation; Wheat Bran


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