AbstractThis overview covers the basic microbial ecology of recirculating hydroponic solutions. Examples from NASA and Soviet CELSS tests and the commercial hydroponic industry will be used. The sources of microorganisms in nutrient solutions include air, water, seeds, plant containers and plumbing, biological vectors, and personnel. Microbial fates include growth, death, and emigration. Important microbial habitats within nutrient delivery systems are root surfaces, hardware surfaces (biofilms), and solution suspension. Numbers of bacteria on root surfaces usually exceed those from the other habitats by several orders of magnitude. Gram negative bacteria dominate the microflora with fungal counts usually much lower. Trends typically show a decrease in counts with increasing time unless stressed plants increase root exudates. Important microbial activities include carbon mineralization and nitrogen transformations. Important detrimental interactions include competition with plants, and human and plant pathogenesis.


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    Titel :

    Dynamics of microorganism populations in recirculating nutrient solutions


    Beteiligte:
    Strayer, R.F. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 14 , 11 ; 357-366


    Erscheinungsdatum :

    01.01.1994


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch






    Dynamics of Microorganism Populations in Recirculating Nutrient Solutions

    Strayer, R. F. / COSPAR; Interdisciplinary Scientific Commission F | British Library Conference Proceedings | 1994