Effects of either sodium selenite or Se yeast (Sc CNCM I-3060) supplementation on selenium status and milk characteristics in dairy cows

Calamari, Luigi; Petrera, F.; Bertin, G.

doi:10.1016/j.livsci.2009.12.005

Cited by 56 publications

(59 citation statements)

References 28 publications

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“…In this study, CTR group cows had an higher milk Se/ingested Se ratio compared with the 3.2% reported by Calamari et al (2010). On the other hand, average Se secretion in milk of cows supplemented with selenized yeast is expected to be 10-18% depending on lactation stage, milk yield, protein yield, and Se intake (Heard et al, 2007;Juniper et al, 2008; Figure 1 Behavior of total Se in milk (a), plasma (b), and feces (c) in dairy cows that received diets containing either sodium selenite providing Se at 0.3 mg/kg DM (CTR) or microencapsulated sodium selenite providing Se at 0.3 mg/kg and 0.5 mg/kg DM (0.3M and 0.5M, respectively) and selenized yeast providing Se at 0.3 mg/kg and 0.5 mg/ kg DM (0.3Y and 0.5Y, respectively).…”

Section: Resultscontrasting

confidence: 50%

“…If the ratio between milk and plasma Se concentration is indicative of the transfer of Se from blood to milk, as suggested by Calamari et al (2010), microencapsulated selenite at 0.5 mg/kg was more efficient than the selenized yeast as the ratio was almost 38% higher (P < 0.01; Table 3). Within the 0.3 mg/kg dose there were no differences among groups (Table 3) although a slightly higher numerical trend was observed for 0.3M group.…”

Section: Resultsmentioning

confidence: 89%

“…Feedstuffs included in the TMR were also analyzed for Se content according to Calamari et al (2010). The basal Se content was taken as a reference to calculate the supplemental Se to be added to the experimental diets.…”

Section: Methodsmentioning

confidence: 99%

“…; plasma was transferred with Pasteur pipette in a plastic test tube and frozen before analysis. Plasma Se and plasma GSH-px were analyzed according to Calamari et al (2010).…”

Section: Methodsmentioning

confidence: 99%

“…The two milk samples collected daily were pooled proportionally to the yield of each lactation and split into two aliquots. One was immediately analyzed for protein, fat, and lactose by MilkoScan (FT6000 Foss Electric, Hillerod, Denmark), whereas the other was frozen for Se analysis that was subsequently performed according to Calamari et al (2010).…”

Section: Methodsmentioning

confidence: 99%

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Microencapsulated sodium selenite supplementation in dairy cows: effects on selenium status

Grilli

Gallo

Fustini

et al. 2013

Animal

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The objective of this study was to compare the efficiency of transfer of selenium (Se) to plasma and milk from inorganic sodium selenite, either free or microencapsulated, and from selenized yeast in dairy cows. The study consisted of an in situ-nylon bags incubation, and in an in vivo experiment to compare the Se status of cows supplemented with either sodium selenite, microencapsulated sodium selenite, or Se yeast. Thirty dairy cows, divided in five groups, were fed the following diets: the control group (CTR) received a total mixed ration supplemented with sodium selenite in order to have 0.3 mg/kg DM of total Se; 0.3M and 0.5M groups received the same control diet supplemented with lipid microencapsulated sodium selenite to provide 0.3 and 0.5 mg/kg DM of total Se, respectively; 0.3Y and 0.5Y groups received selenized yeast to provide 0.3 and 0.5 mg/kg of total Se, respectively. Cows were fed the supplements for 56 days during which milk, blood, and fecal samples were collected weekly to conduct analysis of Se and glutathione peroxidase (GSH-px) activity. Se concentration in the nylon bags was assessed to 72%, 64%, and 40% of the initial value (time 0) after 4, 8, and 24 h of incubation, respectively. In vivo, cows supplemented with 0.3 mg/kg of microencapsulated Se had higher milk Se concentration compared to CTR. The increment was more pronounced at the highest inclusion rate (0.5 mg/kg, 0.5M group). GSH-px activity was not significantly affected by treatments. The results indicate that lipid microencapsulation has the potential to protect nutrients from complete rumen reduction and that Se from microencapsulated selenite is incorporated in milk more efficiently than the free form. Microencapsulated sodium selenite was shown to be comparable to Se-yeast in terms of availability and incorporation in milk when fed at 0.3 mg/kg DM, whereas the inclusion in the diet at 0.5 mg/kg DM resulted in higher plasma and milk concentrations than selenized yeast.

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Section: Resultscontrasting

confidence: 50%

Section: Resultsmentioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

“…; plasma was transferred with Pasteur pipette in a plastic test tube and frozen before analysis. Plasma Se and plasma GSH-px were analyzed according to Calamari et al (2010).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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