Publikationsdatenbank

Weaning pig performance and faecal microbiota with and without in-feed addition of rare earth elements (2006)

Art

Zeitschriftenartikel / wissenschaftlicher Beitrag

Autoren

Kraatz, M

Taras, D

Männer, K

Simon, O

Quelle

Journal of animal physiology and animal nutrition : official journal of the European Society of Veterinary and Comparative Nutrition and the American Academy of Veterinary Nutrition

Bandzählung: 90

Heftzählung: 9/10

Seiten: 361 – 368

ISSN: 0931-2439

Sprache

Englisch

Verweise

Pubmed: 16958792

Kontakt

Institut für Tierernährung

Königin-Luise-Str. 49
14195 Berlin
+49 30 838 52256
tierernaehrung@vetmed.fu-berlin.de

Abstract / Zusammenfassung

Two 6-week feeding trials were conducted on a total of 112 newly weaned piglets to examine the recently reported growth promoting effects of dietary rare earth elements (REE) in European pig production. Rare earth element-diets were supplemented with a REE-citrate premix of lanthanum and the light lanthanoides cerium, praseodymium and neodymium at 200 mg/kg for 6 weeks after weaning. Overall for both trials, growth performance of REE-citrate and control fed piglets did not differ significantly (p > 0.05). An early enhancive tendency for REE-citrate in trial 1 (feed conversion ratio, FCR -3%, p = 0.15) proved irreproducible in trial 2. In the late period of trial 1, in-feed addition of REE-citrate significantly impaired piglet performance (FCR + 8%, p = 0.01). A cultivation-independent molecular approach, polymerase chain reaction-denaturing gradient gel electrophoresis was further applied to assess REE induced alterations in the predominant faecal microbiota from weaning pigs. Calculation of various ecological characteristics does not indicate (p > 0.05) an often discussed selective effect on local microbial composition of dietary REE.