The effect of feeding inorganic and organic selenium sources on the hematological blood parameters, reproduction and health of dairy cows in the transition period

Abstract

The purpose of this study was to investigate the effects of four types of diets containing different forms of selenium on the hematological blood parameters, reproduction and health of dairy cattle during the transition period. Twenty-four close-up dry cows with a mean of 259 ± 1days of pregnancy and expected 21 ± 1days prior to parturition were selected. The cows were fed four diets: 1) basal diet without selenium supplementation (C); 2) basal diet plus 0.5ppm selenium in the form of sodium selenite (Se-S) 3) basal diet plus 0.5ppm selenium in the form of selenium yeast (Se-Y); 4) basal diet plus 0.5ppm selenium in the form of selenomethionine (Se-M). Blood samples for measuring hematological blood parameters (including lymphocyte, red blood cells, hemoglobin, and hematocrit, MCV, MCH, MCHC and RDWc) were taken at 21 and 10 days before delivery, delivery date, 10 and 21 days after delivery. There was no significant difference in hematological parameters before and after delivery in experimental and control groups. However, in the prepartum period, MCH tended to increase significantly in selenium methionine treatment (p<0.05). Reproductive parameters (including distance to first estrus, insemination indexes and number of open days) and health parameters (including rectum temperature and vaginal content score) have been improved by selenium organic supplements. The results of this experiment showed that feeding organic selenium supplementation in multiparous dairy cow’s diet may improve their health and reproduction.

Estatus oxidativo, antioxidante, del selenio, y aceptabilidad del consumidor de la carne de ave enriquecida con selenio dietario

“…In this context, antioxidant supplementation in the poultry diet is an interesting and affordable strategy to protect the meat from oxidation. Among the antioxidant supplements used, seleni-um (Se) is a micronutrient required mostly by animals and humans, that has attracted attention in recent years because of its dual role as a cofactor of the antioxidant enzyme GPx (Pascual and Aranda, 2013) and its important activity of strengthening the immune system as a component of selenoproteins and enzymes, its influence on the thyroid gland and anti-carcinogenic capacity (Hariharan and Dharmaraj, 2020).In previous works, it was shown that the expression of certain GPx enzymes could be strongly linked to selenium availability (Blas et al, 2013) in the diet, so Se supplementation could promote its activity in tissues, as previously reported in several species (Khalili et al, 2020;Wang and Xu, 2008). Besides, it was demonstrated that skeletal muscle is one of the major sites for selenium storage (Pascual and Aranda, 2013).…”

“…Whereas when selenium is supplemented, selenomethionine, selenium-rich yeast, and sodium selenite are the organic and inorganic forms used, and they vary in the absorption, efficiency, and metabolism mechanisms (Hariharan and Dharmaraj, 2020). Several studies in different species have indicated that selenomethionine could be more effective than inorganic sources, selenite or selenate (Ali et al, 2020;Juniper et al, 2008;Vignola et al, 2009;Yanyan et al, 2011).…”

Respuesta serológica contra Mannheimia haemolytica y su leucotoxina en conejos suplementados con selenio

“…No se observaron deficiencias de selenio en sangre, los tres grupos mantuvieron niveles adecuados durante todo el experimento. Se ha observado que la suplementación con el mineral incrementa los niveles de selenio en sangre en vacas lecheras (Khalili, et al, 2020), cerdos (Cao et al, 2014, en pollos (Doaa et al, 2019), borregos (Ademi et al, 2017 y cabras (Ziaei, 2015), con efectos benéficos en la salud y la producción animal; sin embargo, un exceso del mineral en la dieta puede llegar a tener efectos negativos en la productividad con la consecuente intoxicación de los animales y la muerte (Żarczyñska et al, 2013). Se observó que hubo variaciones en las concentraciones de selenio a lo largo del experimento para todos los grupos.…”

Reviewing Effective Factors of Alimentary Deficiency in Animals Reproductive Functions

“…There is evidence indicating that selenium deficiency increases the frequency of abortions (Hedstrom et al, 1986). The use of selenium drugs reliably prevents these pathological processes (Giadinis et al, 2016;Khalili et al, 2020).…”