Feed Additive and Compost Having Rare Earth Element

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PURPOSE : A feed additive and manure containing rare earth elements are provided to secure effects of promoting growth in comparison with existing general feed and minimize side effects caused by excessive use of copper and zinc with high concentration.CONSTITUTION : A feed additive and manure comprise the following steps of : dissolving rare earth elements in water; and spraying the dissolved rare earth elements on an adsorption material of vermiculite powder so that the feed additive includes powdery rare earth compounds. The rare earth compounds are selected among rare earth chloride, rare earth nitride and rare earth oxide. The rare earth element is selected among lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and yttrium.© KIPO 2009