Litter treatment with bentonite or paraformaldehyde. Effects on air quality and on milk yield of Comisana ewes

alojamiento de animales animal housing animal husbandry methods batteri coliformi bentonita bentonite biological contamination brebis breeds (animals) calidad cama (animales) chemical composition composition chimique composizione chimica contamination biologique contaminazione biologica conteggio delle cellule somatiche contenuto lipidico controllo dell'inquinamento dairy hygiene disinfection disinfezione ewe milk ewes formaldehyde formaldeide higiene de la leche igiene lattiero-casearia lait de brebis latte di pecora leche de oveja lettiera per animali lipid content litter for animals logement des animaux lutte antipollution metodi di allevamento degli animali microorganismos psicrofilos microrganismi mesofili microrganismi psicrofili milk yield oveja pecore pollution control psychrophilic microorganisms quality race (animal) razas (animales) razze (animali) rendement laitier rendimiento lechero somatic cell count technical properties teneur en lipides