The effect of copper and cobalt supplementation on the rumen ciliate population in sheep
2000
Kisidayova, S. | Sviatko, P. | Zelenak, I. (Slovenska Akademia Vied, Kosice (Slovak Republic). Ustav Fyziologie Hospodarskych Zvierat)
The effect of physiological doses of the sulfate form of copper (12 mg/kg DM), cobalt (2 mg/kg DM) and cobalt + copper (2 + 12 mg/kg DM) in two different diets on the rumen ciliate protozoa of four Merino rams with rumen cannula was investigated. The total number of ciliates, Entodinia spp., Trichostomatids (Dasytricha and Isotricha) and large Entodiniomorphids (Polyplastron multivesiculatum and Ophryoscolex caudatus tricoronatus) was counted in the rumen fluid 3 h after feeding the animals. The number of Entodinium spp. and thus the total number of ciliates significantly increased with diet A (complete feed ration: meadow hay, feed mixture, corn, molasses, mineral supplement, treated beech sawdust) without microelement supplementation. The population of Entodinium spp. was decreased by 69 % with diet B (meadow hay and barley meal). No significant effect of Co, Cu or Cu + Co supplementation on the growth of Entodinium spp. was observed with diet A. Supplementation of Cu significantly decreased the number of Entodinium spp. by 45 % with diet B. The number of Trichostomatids was significantly decreased by 80 % with diet A. After supplementation with Co their growth was significantly higher with diet A (control values were lower by 87 %). No significant effect of Cu or Cu + Co supplementation on the growth of trichostomatids was observed with diet A or diet B. Neither diet A nor diet B revealed any significant effect of Co, Cu or Cu + Co supplementation on the growth of large Entodiniomorphids.
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