Überhöhte orale Eisengaben an Schafe

Abstract

4 digestibility trials (4 male sheep per group) and 2 growth trials were carried out with 24 (V 1) and 32 (V 2) fattening lambs to investigate the effect of abundant oral Fe doses on the digestibility of crude nutrients in a ration of barley + dried green feed and on the results of fattening and carcass yields. Fe supplementation (less than 1400 mg per sheep/day) did not significantly change the digestibility coefficients of crude nutrients. Increasing Fe levels in the concentrates decreased the rates of liveweight increase and food consumption in both growth trials. Well-established statistical evidence was provided for the decline in absolute carcass yields resulting from the lower weight of the lambs at the end of the fattening period after Fe supplementation.

Influence of soil contamination before and after ensiling on mineral composition of grass silages, feed intake and carry-over to body tissue of goats

“…However, despite the indicated mechanisms of Fe homeostasis, an excess Fe supply of cattle and sheep has been described to decrease feed intake and having antagonistic effects to other trace elements such as Cu, Zn and Mn. Furthermore, Fe excess causes poor appetite, decreased feed utilization and decreased body weight gain (Standish et al, 1969;Flachowsky et al, 1976;Grün et al, 1978;Lamand et al, 1979;Suttle, 2010).…”