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Alternative Cropping Systems that Utilize Greenhouse Concepts
Why? <ul><li>Globalization of Greenhouse Competition </li></ul><ul><li>Need for Closed Cultural Systems </li></ul>
Types of Technology Developed <ul><li>Nutriculture </li></ul><ul><ul><li>NFT </li></ul></ul><ul><ul><li>Rock Wool Culture ...
Why Nutriculture? <ul><li>Uses an inert substrate </li></ul><ul><li>No need for pasteurization </li></ul><ul><li>Microbes ...
NFT Popularity Due To: <ul><li>No need for pasteurization of root substrate (steam or chemical) between crops </li></ul><u...
http://www.funsci.com/fun3_en/exper1/exper1_05.gif
 
www.mrhydro.com/ pictures1.htm
http://aquanic.org/images/photos/ill-in/hydrorot.jpg
 
 
http://www.hydroponics.co.nz/images/large/nft.jpg
 
In closed system nutrient solution must be pasteurized <ul><li>Rapid heat approaching 100 C in 30 sec. </li></ul><ul><li>R...
Rock Wool Culture <ul><li>Use only horticultural grade rock wool </li></ul><ul><ul><li>Treated with surfactants </li></ul>...
 
Advantages of Rock Wool <ul><li>Elimination of pasteurization (unless reused) </li></ul><ul><li>Production Efficiency – le...
 
 
Whole Firm Recirculation <ul><li>In some parts of the country there is a zero tolerance for nitrate runoff. </li></ul><ul>...
 
The University of Arizona CEAC.
 
 
 
The University of Arizona CEAC.
science.ksc.nasa.gov/ biomed/marsdome/papers.html
 
 
 
 
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Alt Crop Systems

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  • Transcript of "Alt Crop Systems"

    1. 1. Alternative Cropping Systems that Utilize Greenhouse Concepts
    2. 2. Why? <ul><li>Globalization of Greenhouse Competition </li></ul><ul><li>Need for Closed Cultural Systems </li></ul>
    3. 3. Types of Technology Developed <ul><li>Nutriculture </li></ul><ul><ul><li>NFT </li></ul></ul><ul><ul><li>Rock Wool Culture </li></ul></ul><ul><li>Other </li></ul><ul><ul><li>Ebb and flood system </li></ul></ul><ul><ul><li>Trough culture </li></ul></ul><ul><ul><li>Float system </li></ul></ul><ul><ul><li>Whole firm recirculation </li></ul></ul>
    4. 4. Why Nutriculture? <ul><li>Uses an inert substrate </li></ul><ul><li>No need for pasteurization </li></ul><ul><li>Microbes aren’t the same problem </li></ul><ul><li>Bulk of root substrate can be greatly reduced </li></ul><ul><li>No substrate decomposition </li></ul><ul><li>Superior control over plant nutrition </li></ul>
    5. 5. NFT Popularity Due To: <ul><li>No need for pasteurization of root substrate (steam or chemical) between crops </li></ul><ul><li>Potential for water and nutrient conservation is great </li></ul><ul><li>Recirculation of nutrient solution much easier </li></ul><ul><li>Easier to automate than other production systems. </li></ul>
    6. 6. http://www.funsci.com/fun3_en/exper1/exper1_05.gif
    7. 8. www.mrhydro.com/ pictures1.htm
    8. 9. http://aquanic.org/images/photos/ill-in/hydrorot.jpg
    9. 12. http://www.hydroponics.co.nz/images/large/nft.jpg
    10. 14. In closed system nutrient solution must be pasteurized <ul><li>Rapid heat approaching 100 C in 30 sec. </li></ul><ul><li>Rapid cooling in 30 sec. </li></ul><ul><li>Ozone production – also oxygenates </li></ul><ul><li>Cl/Br – oxidizes organic matter (must pre-filter OM) </li></ul><ul><li>UV treatment </li></ul><ul><li>Biofiltering </li></ul>
    11. 15. Rock Wool Culture <ul><li>Use only horticultural grade rock wool </li></ul><ul><ul><li>Treated with surfactants </li></ul></ul><ul><ul><li>3% solid 90% air (think cotton candy) </li></ul></ul><ul><li>Little nutrients are adsorbed to media, so what is applied in the solution is available to plants </li></ul><ul><li>Lasts about two years, not really biodegradable </li></ul><ul><li>pH of 7-8.5, but with acid nutrient solution pH adjusts rapidly </li></ul>
    12. 17. Advantages of Rock Wool <ul><li>Elimination of pasteurization (unless reused) </li></ul><ul><li>Production Efficiency – less disease can be made to work in a closed system. </li></ul><ul><li>Reduced Production Space. </li></ul>
    13. 20. Whole Firm Recirculation <ul><li>In some parts of the country there is a zero tolerance for nitrate runoff. </li></ul><ul><li>All nutrient solution is collected </li></ul><ul><ul><li>Solution is collected in a settling pond for solids removal </li></ul></ul><ul><ul><li>Alum added to collect additional solids </li></ul></ul><ul><ul><li>Liquid from pond collected and injected with Cl to pasteurize it </li></ul></ul><ul><ul><li>Solution is filtered (for any remaining solids) </li></ul></ul><ul><ul><li>New nutrients added and pH adjusted </li></ul></ul><ul><ul><li>Solution applied to crop again </li></ul></ul>
    14. 22. The University of Arizona CEAC.
    15. 26. The University of Arizona CEAC.
    16. 27. science.ksc.nasa.gov/ biomed/marsdome/papers.html

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