Intraruminal mineral selenium boluses evaluation through blood and wool selenium concentration in grassing lambs

Miguel Ángel Blanco Ochoa; Alfredo Kurt Spross Suárez; René Rosiles Martínez

2000, Number 2

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Vet Mex 2000; 31 (2)

Intraruminal mineral selenium boluses evaluation through blood and wool selenium concentration in grassing lambs

Blanco OMA, Spross SAK, Rosiles MR

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Language: English/Spanish
References: 32
Page: 121-127
PDF size: 73.07 Kb.

ABSTRACT

Natural and cultivated grasses contain Se as result and influence of its soil concentration. Oral mineral boluses are one choice of supplementation. The objective of this research was to find out the time and intensity of Se liberation from mineral intraruminal boluses measured by blood and wool Se concentration in female lambs for a 3 month period. Three groups of ten lambs each were formed for Se bolus administration. Orally administered boluses for these lambs were made with: 1%, 4.6% and without Se (ten boluses per group and a 5 g weight bolus per lamb). Lambs were grassing: Lollium perenne, Pennisetum clandestinum and Trifolium repens latum, during the day-time, and received 250 g of a concentrated feed at the manger with no Se added. Mean blood and wool Se concentrations were 182.0 ng/g and 341.7 ng/g, respectively in the group with 4.6% Se boluses during the 3 month period. The statistical difference (P › 0.05) was higher when two groups with 1.5% and no Se boluses were compared. There was a stastitical difference (P › 0.05) when results of groups 1% Se and the control one to group 4.6% Se were compared. Statistical difference in Se concentration between the control and the 1% Se bolus groups was not meaningful regarding blood only in the wool one. It is concluded that mineral boluses with 4.6% Se content and 5 g weight are recommended as supplementation for grassing lambs.

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