[Effect of iodine, copper and zinc additions to the diet with a high proportion of coarse rape meal extract on the growth and thyroid function of fattening pigs. 1. The effect on fattening performance].
In three experiments with fattening pigs the supplementation of a ration with 8% rapeseed oilmeal (RSO) with 1 mg J/kg resulted in an increased weight gain per day of 31, 94 and 87%. On the other hand, only 83, 76 and 84% of the weight gain of the soybean oilmeal control groups were achieved. The additional supply with 250 mg Cu (experiments II and III) increased the weight gain to 84 and 96% in comparison to the unsupplemented control groups. The combination of J + Cu + Zn lead to the same performance as that of J + Cu (experiment III). In the RSO groups without J-supplement changes in body proportions and parakeratosis could be observed after approximately equal to 7 weeks. After the sole supplementation of Cu these symptoms occurred approximately equal to 4 weeks later. In vitro, the supplementation of RSO with a CuSO4 solution resulted in a decrease of vinylthiooxazolidon and isothiocyanate in line with the CuSO4-concentration. 0.2 mg J/kg feed (experiment III) resulted in the same fattening performance as the supplementation of the ration with 1 mg J and outwardly visible deficiency symptoms. The results show that Cu, depending on its quota, results in a decrease of goitrogenics in the feed and that J and Cu supplementation to rations with rapeseed oilmeal have an additive effect and that parakeratosis can be prevented by J-supplementation.
D000821:Animal Feed; D000818:Animals; D001937:Brassica; D003300:Copper / Q000378:metabolism; D007455:Iodine / Q000378:metabolism; D013025:Glycine max; D013552:Swine / Q000254:growth & development*; D013961:Thyroid Gland / Q000502:physiology*; D013997:Time Factors; D014131:Trace Elements / Q000378:metabolism*; D015032:Zinc / Q000378:metabolism
D014131:Trace Elements; D003300:Copper; D007455:Iodine; D015032:Zinc
Der Einfluss von Jod-, Kupfer- und Zink-Zulagen zu Rationen mit hohem Rapsextraktionsschrotanteil auf Wachstum und Schilddrüsenfunktion des Mastschweines. 1. Mitteilung. Einfluss auf die Mastleistung.