History of organic hydroponics Organic hydroponics

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studies establishing organic hydroponics have been conducted long time. kennedy space center had studied organic hydroponics crop production in space. necessary develop method generate nitrate organic fertilizer via ammonification , nitrification, because of crops nitrate-phylic not ammonium-philic. easy generate ammonium organic fertilizer saprophytic microorganisms. difficult degrade organic fertilizer nitrate efficiently because growth of nitrifying bacteria, such obligate chemolithoautotrophs nitrosomonas spp. , nitrospira spp., particularly inhibited presence of organic compounds (jensen 1950; quastel , scholefield 1951; rittenberg 1969; smith , hoare 1977; krummel , harms 1982; takahashi et al. 1992; stutte 1996; xu et al. 2000; tomiyama et al. 2001).


shinohara invented method efficiently generate nitrate in water. method, multiple parallel mineralization, consists of 3 manipulations: small inoculation of soil microorganisms, addition of small amounts of organic fertilizer, , aeration. mineralized solution can used hydroponic solution , organic fertilizer can added in solution during cultivation. first practical organic hydroponics technique organic fertilizer can added directly during cultivation.


farajollahzade et al., introduced method in soil remained source of nutrients , nitrogen supplied in-line tank containing nitrogen-fixing bacteria. method considered variation of soil culture in plant , soil connected cycling liquid. use of organic soil source of nutrients, believe considered within definition of organic agriculture.








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