Features of mineral metabolism in young rams on rapeseed and lupine diets
https://doi.org/10.26897/2074-0840-2026-2-44-50
Abstract
This paper presents the results of a chronic physiological experiment using rapeseed and white lupine as alternative protein sources. Using the period method, postprandial calcium and phosphorus dynamics in duodenal chyme and blood were studied in fistulated rams during intensive fattening after the introduction of experimental protein feeds (30% of concentrates) into the diet. Low-alkaloid lupine has been shown to be metabolically safe, maintaining normal calcium and phosphorus metabolism both in the intestines and in the blood serum. Rapeseed inhibits the reflex release of elements via digestive juices during the complex reflex phase of digestion, reducing calcium levels by 22,1% and phosphorus by 18,6% (p < 0,001) relative to the control. During the rumen phase of digestion, during intestinal mineral absorption, experimental feeds form a “transit phytate block,” in which calcium and phosphorus concentrations increase in the chyme but are not absorbed into the blood, reducing blood phosphorus by 40,1%. Compensatory leukocytosis is also observed (WBC increase by 3.05 times; correlation r = –0,91; p <0,001).
About the Authors
Yu. A. Yuldashbaev
Russian State Agrarian University – Moscow Agricultural Academy named after K.A. Timiryazev
Russian Federation
Russian Federation
Yusupzhan A. Yuldashbaev, doctor of Agricultural Sciences, professor, Academician of the Russian Academy of Sciences, Head of the Department of Private Animal Science
127434, Moscow, Timiryazevskaya St., 49
tel.: 8 499-976-02-36
S. V. Karamushkina
Russian State Agrarian University – Moscow Agricultural Academy named after K.A. Timiryazev
Russian Federation
Russian Federation
Svetlana V. Karamushkina, Candidate of Biological Sciences, Associate Professor of the Department of Pathology, Morphology and Physiology
127434, Moscow, Timiryazevskaya St., 49
tel.: 8 914 591 03 46
E. A. Muradyan
Russian State Agrarian University – Moscow Agricultural Academy named after K.A. Timiryazev
Russian Federation
Russian Federation
Ekaterina A. Muradyan, Assistant of the Department of Animal Physiology, Ethology, and Biochemistry
127434, Moscow, Timiryazevskaya St., 49
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Review
For citations:
Yuldashbaev Yu.A., Karamushkina S.V., Muradyan E.A. Features of mineral metabolism in young rams on rapeseed and lupine diets. Sheep, goats, wool business. 2026;(2):44-50. (In Russ.) https://doi.org/10.26897/2074-0840-2026-2-44-50
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