5. Niyazov SA, Kalnitsky BD. Effects of low-protein diets with different levels of essential amino acids and metabolizable energy on productivity and metabolic processes in pigs. Russ Agric Sci 2018; 44:75–9.
https://doi.org/10.3103/S1068367418010135
6. Gous RM, Faulkner AS, Swatson HK. The effect of dietary energy:protein ratio, protein quality and food allocation on the efficiency of utilisation of protein by broiler chickens. Br Poult Sci 2018; 59:100–9.
https://doi.org/10.1080/00071668.2017.1390211
7. Niyazov SA, Kalnitsky BD. Productivity and nitrogen metabolism in pigs fed low-protein diets with various levels of essential amino acids. Russ Agric Sci 2014; 40:470–4.
https://doi.org/10.3103/S1068367414060184
8. Sauvant D, Perez JM, Tran G. Tables of composition and nutritional value of feed materials: pig, poultry, sheep, goats, rabbits, horses, fish. Paris, France: Wageningen Academic Publishers Wageningen, the Netherlands and INRA; 2004.
10. Rosero DS, Odle J, Arellano C, Boyd RD, Van HE. Development of prediction equations to estimate the apparent digestible energy content of lipids when fed to lactating sows. J Anim Sci 2015; 93:1165–76.
https://doi.org/10.2527/jas.2014-8402
11. Committee on Nutrient Requirements of Swine, National Research Council. Nutrient requirements of swine. 11th edWashington, DC, USA: National Academy Press; 2012.
12. Allee GL, Hines RH. Influence of fat level and calorie: protein ratio on performance and carcass composition of young pigs. Swine day. 1972. Nov. 2Manhattan, KS, USA. Manhattan, KS, USA: Kansas State University, Agricultural Experiment Station and Cooperative Extension Service; 1972. p. 29–32.
16. Zhao JB, Shi CX, Li ZC, et al. Effects of supplementary amino acids on available energy of soybean meal determined by difference and regression methods fed to growing pigs. Anim Sci J 2018; 89:404–11.
https://doi.org/10.1111/asj.12940
19. Adeola O. Digestion and balance techniques in pigs. Lewis AJ, Southern LL, editorsSwine nutrition. 2nd edNew York, USA: CRC Press; 2001. p. 903–16.
20. Sukhija PS, Palmquist DL. Rapid method for determination of total fatty acid content and composition of feedstuffs and feces. J Agric Food Chem 1988; 36:1202–6.
https://doi.org/10.1021/jf00084a019
21. AOCS. Official methods and recommended practices of the American Oil Chemists’ Society. 6th ednUrbana IL, USA: AOCS; 2011.
23. AOAC. Official methods of analysis Association of Official Analytical Chemists. 18th ednWashington DC, USA: AOAC International; 2005.
24. Jaworski NW, Liu DW, Li DF, Stein HH. Wheat bran reduces concentrations of digestible, metabolizable, and net energy in diets fed to pigs, but energy values in wheat bran determined by the difference procedure are not different from values estimated from a linear regression procedure. J Anim Sci 2016; 94:3012–21.
https://doi.org/10.2527/jas.2016-0352
26. Jørgensen H, Jensen SK, Eggum BO. The influence of rapeseed oil on digestibility, energy metabolism and tissue fatty acid composition in pigs. Acta Agric Scand A Anim Sci 1996; 46:65–75.
https://doi.org/10.1080/09064709609415854