Lead, cadmium, aluminium and ptaquiloside in the feed chain: a case from the northern part of Romania

alcaloides aliment pour animaux alkaloids aluminio aluminium blood serum bovin cadena alimentaria cadmio cadmium cattle feeds food chains ganado bovino haematuria hematuria hematurie kidneys lead orina osteodistrofia osteodystrophie osteodystrophy piensos plomb plomo pollution pteridium rachitisme raquitismo rein rickets romania roumanie rumania soil sol suelo urine