Method of feeding young pigs

Abstract

Method of feeding young pigs involves feeding young pigs with complete mixed feed. Wherein, isoleucine levels in the composition of mixed feed are specifically regulated by introducing synthetic isoleucine. The ratio of standardized ideal digestible (SID) isoleucine to lysine in the diet is 0.55. The specified ratio is maintained in the diets of young pigs during the nursery after weaning, from 24 to 70 days of age.

Description

The utility model belongs to the field of animal husbandry, in particular pig breeding, and can be used in the industrial breeding of young pigs when forming complete feed for the purpose of increasing growth intensity, improving feed conversion and stabilizing metabolic processes in in the animal body. In modern industrial pig farming, the efficiency of raising young pigs is significantly depends to a large extent on the completeness and balance of diets in terms of energy content, crude protein and essential amino acids. Traditionally, young pig diets are based on cereals components in combination with soybean meal as the main source of vegetable protein, which confirmed by numerous modern scientific publications. The studies [Zhan et al. (2024)] provide feed formulations for young pigs weighing 25-50 kg, in which the basic components are cereals and soybean meal, and the balance of nutrients substances is achieved due to the total level of crude protein and a standard set of synthetic amino acids. A similar approach is described in [de Almeida et al. (2024)], which considers production, physiological and environmental aspects of reducing crude protein levels in pig diets by conditions for correcting the amino acid profile. The work [Garavito-Duarte et al. (2023)] summarizes data on the nutritional value of high-protein feed ingredients in feeding young pigs, in particular their amino acid composition and digestibility. The authors note that the formation of rations in most cases is based on balance of crude protein and lysine as the main limiting amino acid, while other essential amino acids are taken into account indirectly. However, as shown in the study [Li (2025)], modern approaches to pig feeding rationing focused mainly on determining the need for digestible protein and total amino acid balance, without a clear distinction of isoleucine as a separately normalized indicator. This indicates that in known feeding methods isoleucine is not normalized independently, but its level is determined indirectly through the total protein composition of the diet. Thus, although modern diets for young pigs take into account the balance of protein and individual amino acids, direct normalization of isoleucine and establishment of the optimal ratio Isoleucine and lysine are absent in known feeding methods, which limits the possibility of optimizing growth processes and efficiency of feed use. The disadvantage of known methods of feeding young pigs is that they do not provide for targeted regulation of the level of isoleucine in compound feeds and its ratio with lysine. This can lead to a hidden deficiency of isoleucine, a violation of the amino acid balance, reduced growth rate and poor feed conversion even with sufficient total crude protein level. The utility model is based on the task of developing a method of feeding young pigs, which provides increased growth intensity, improved feed conversion and stabilization of biochemical blood parameters through targeted normalization of isoleucine in the composition of complete diets compound feed. The problem is solved by the fact that in the method of feeding young pigs, which includes feeding young pigs with complete feed, according to the utility model, in the composition compound feeds carry out targeted rationing of isoleucine by introducing synthetic isoleucine, with the ratio of standardized ideal digestibility (SID) of isoleucine and lysine in the diet is 0.55, and this ratio is maintained in the diets of young pigs during the growth period after weaning, from 24 to 70 days of age. The use of the proposed method of feeding young pigs ensures: an increase growth intensity and increase in live weight of animals by 8.8% (p<0.001); improvement of feed conversion by 5.7% (p<0.001); stabilization of biochemical blood parameters, which indicates normalization of metabolic processes in the body of young pigs. Thus, it was established that the optimal SID ratio of isoleucine and lysine at 0.55 is an effective factor in increasing productivity and biological value of feeding young animals pigs. A proposed method of feeding young pigs, which involves targeted rationing isoleucine and maintaining the SID ratio of isoleucine to lysine at 0.55 during the growing period after weaning, is a new and effective solution in the practice of industrial pig farming and allows significantly increase productivity and feed efficiency. Sources of information: Zhan, X., et al. (2024). Effect of miscellaneous meals replacing soybean meal in feed on growth performance, serum biochemical parameters, and microbiota composition of 25-50 kg growing pigs. Animals, 14, Article 1354. https: / / doi.org / 10.3390 / anil4091354 de Almeida, AM, Latorre, MA, & Alvarez-Rodriguez, J. (2024). Productive, physiological, and environmental implications of reducing crude protein content in swine diets: A review. Animals, 14(21), Article 3081. https: / / doi.org / 10.3390 / anil4213081 Li, S. (2025). Dietary digestible protein requirement in finishing pigs. Agriculture, 15(12), Article 1306. https: / / doi.org / 10.3390 / agriculturel5121306 Garavito-Duarte, Y. R., et al. (2023). Nutritional value of high protein ingredients fed to growing pigs. Animal Nutrition. https: / / www.ncbi.nlm.nih.gov / pmc / articles / PMC 10195198 /

Claims

Method of feeding young pigs, comprising feeding young pigs complete feed, which is distinguished by the fact that the composition of the feed includes targeted normalization of isoleucine by administering synthetic isoleucine, with this ratio of standardized ideal digestibility (SID) of isoleucine and lysine in the diet is 0.55, and this ratio is maintained in the diets of young animals pigs in the growing period after weaning, aged from 24 to 70 days.