Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Net energy and its establishment of prediction equations for wheat bran in growing pigs

  • Zhiqian, Lyu (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University) ;
  • Yifan, Chen (College of Animal Science and Technology, Hebei Agricultural University) ;
  • Fenglai, Wang (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University) ;
  • Ling, Liu (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University) ;
  • Shuai, Zhang (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University) ;
  • Changhua, Lai (State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University)
  • Received : 2021.12.31
  • Accepted : 2022.05.03
  • Published : 2023.01.01
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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 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

Acknowledgement

Thanks for the support from the National Key R&D Program of China (2019YFD1002605), National Natural Science Foundation of China (31630074; 31702121; U1604106), and the 111 Project (B16044). We are grateful for the support from China Postdoctoral Management Committee.

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