[The effectiveness of rare earth elements as a possible alternative growth promoter for pigs and poultry].

Schuller, Simone; Borger, C; He, M L; Henkelmann, R; Jadamus, A; Simon, O; Rambeck, W A (2002). [The effectiveness of rare earth elements as a possible alternative growth promoter for pigs and poultry]. Berliner und Münchener tierärztliche Wochenschrift, 115(1-2), pp. 16-23. Schlütersche

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Mixtures of Rare Earth Elements (REE) have been used as animal growth-promoters on a large scale in China during the last 20 years. Numerous studies carried out in China claim it produces quite sensational growth-promoting effects in all categories of farm animals. To explore the question of whether REE's might prove suitable as a growth-promoter under western keeping conditions, feeding experiments were performed on pigs and poultry. The animals received a typical diet, supplemented with REE salts in concentrations between 75 and 300 mg/kg feed. Weight-gain, feed-intake, feed-conversion and (where applicable) laying parameters were observed. It was shown that in pigs receiving feed supplemented with REEs, an increase in daily weight gain of up to 19% and an improvement in feed-conversion of up to 11% can be achieved, whereas, for poultry, no positive effects on growth or productivity of the animals could be observed. Testing of important organs via Neutron Activating Analysis (NAA) showed a minute accumulation of REE, principally in liver and bones. Analysis of the poultry gut-flora, using selective media, showed that the main microorganism populations of the alimentary canal were unaffected by feed-supplementation with REE.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Small Animal Clinic
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Small Animal Clinic > Small Animal Clinic, Internal Medicine

UniBE Contributor:

Schuller, Simone

Subjects:

600 Technology > 630 Agriculture
600 Technology > 610 Medicine & health

ISSN:

0005-9366

Publisher:

Schlütersche

Language:

German

Submitter:

Simone Schuller

Date Deposited:

10 Oct 2014 11:26

Last Modified:

10 Oct 2014 11:26

PubMed ID:

11852679

URI:

https://boris.unibe.ch/id/eprint/59158

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