Fuyu  Yang, Lian  Tao, Menglu  Li, Xusheng  Guo, He  Zhou, 
    Effect of Epiphytic Microorganisms and Exogenous Lactic Acid Bacteria on 
  the Formation of Non-protein Nitrogen During the Ensiling of Alfalfa,
    Journal of Animal and Veterinary Advances,
    Volume 11,Issue 13,
    2012,
    Pages 2181-2186,
    ISSN 1680-5593,
    javaa.2012.2181.2186,
    (https://makhillpublications.co/view-article.php?doi=javaa.2012.2181.2186)
    Abstract: The effect of epiphytic microorganisms and exogenous Lactic Acid Bacteria (LAB) on the formation of Non-Protein Nitrogen (NPN) components during the ensiling process was investigated. All silages were prepared in mini-silos of 100 mL polypropylene centrifuge tubes and kept in an incubator at 30°C and tubes of each treatment were opened after 1, 3, 7, 14 and 35 days of ensiling. Treatments included three variations: nothing added (control); epiphytic microorganisms killed (treated with Ultraviolet (UV) rays) and xogenous lactic acid bacteria (inoculants of lactic acid bacteria after treatment with UV rays) added.
    Keywords: Alfalfa silage;epiphytic microorganisms;exogenous lactic acid bacteria;proteolysis;silages;butyric acid