Plant propagation

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Plant propagation
2011-02-22 04:51:12
Plant propagation Hawaii Manoa

Plant propagation Criley U of Hawaii Manoa Test 1
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  1. Why do growers take records?
    • 1. Its required by the Gov.'t
    • 2. Obtain credit
    • 3. aid management in making decisions
    • 4. Quality for disaster/ crop insurance or compenasation
    • 5. day to day records: cu yrds of medium, grades of plants produced, hours of labor
  2. What kind of things are important to record?
    • general info about plants
    • propagation information
    • scheduling
    • results: % take, quality of product, length of time
  3. When choosing a location, what things must be considered?
    • Physical: slope/exposure
    • water sources/ quality
    • environment
    • labor, parking (convenience)
    • Utilities
    • Transportation to markets
  4. What is a disadvantage of an established site?
    You must make do with what you have. You can't manipulate the system too much.
  5. Waht is an adventage to a new open site?
    • You design it from scratch
    • function area lay-out

    ** keep transportation in mind!
  6. What are 3 planning considerations?
    Plant related: stock plants, cuttings, treatment and handling of plants

    Buildings/ stuctures: storage, ops, employee comfort, propagation, access, machinery, heat/cool

    materials: media (mixing), containers, chemicals, access to new materials.
  7. What are two functions of propagation structures?
    Modify the environment: light, water (moisture/humidity), temperature, gases (if enclosed)

    protect from : pathogens, , pests, wind, cold/heat, heavy weather
  8. Name 5 types of greenhouse covering materials and describe.
    Glass: various pane sizes, breakage, high cost, lasts long, heavy

    Plastic film: polyethylene, polyvinylchloride, 2-8 cm thick, single and double thickness, longevity a problem

    Flexi plastic sheeting: acrylic, polycarbinate, shatter-resistant, filter heat transfer

    Fiberglass: less used than any other

    Saran netting: woven/knitted, various degrees of light transmission
  9. describe a lean to greenhouse
    • usually residential
    • light availability an issue
  10. describe an even-span greenhouse
  11. describe an uneven span greenhouse
  12. describe a ridge and furrow greenhouse
    same as even span, but one right after the other, share walls
  13. Why are greenhouses white?
    to relight light
  14. What are some problems with soil as a propagative medium?
    • toxicity
    • salinity
    • sanitation (diseases)
  15. What are some sources of disease?
    • fertilizers
    • containers
    • soil
    • water
    • organic matter
    • planting stock
  16. At what height should cuttings be taken from to avoid disease problems?
    higher than 18 inches
  17. what are 4 functions of medium?
    holding cutting in place

    provide moisture for cutting

    permits penetration of air to cutting base

    holds nutrients (not important if cutting doesn't have roots yet)
  18. What are desirable traits of a propagative medium?
    ability of medium to support cutting

    Easy sticking of cuttings into medium

    adequate aeration and free drainage

    • development of fiberous root system
    • -texture:
    • coarse: brittle roots, less chance for survival
    • fine: fiberous roots, more sturdy

    retains structure during rooting
  19. What is optimum porosity of rooting medium?
    30% air porosity
  20. 3 criteria for good drainage.
    Well- graded product

    product retains structure during rooting

    must allow for changes in the environment and plant, can you alter the conditions for better rooting?
  21. What things must be considered when discussing sanitation of rooting medium?
    free of weed seed, nemetodes, pests

    pasteurizable, can it be fumigated?

    low salt content?
  22. What is the key to success in plant propagation?
    good water management
  23. What is a optimum c:n ratioand CEC of a propagative medium?
    • 20:1 c:n
    • High CEC
  24. Name and describe 5 types of plant containers used on the market.
    seed germination: plug flat

    cutting propagation: metal flat, plug units

    growing on of seedling, liners, rootstocks

    containers for salable plants

    decorative containers
  25. Name 6 things to consider when choosing a TYPE of container.
    # of times it can be used/reused

    Kind of medium(texture , size , aeration, drainage)

    Weight of the medium

    bench size

    irrigation system used

    use of automated machinery
  26. What are 16 characteristics of a container that should be considered after the choice of container material has be established?
    • Uniformity
    • appearance
    • ease of de-nesting (seperating from eachother)
    • cost
    • sturdiness
    • merketing decisions
    • size
    • shipping operations
    • shape
    • consumer requests
    • ease of plant removal
    • plant growth
    • drainage
    • waste disposal
    • space usage
    • recyling
  27. what is an elle pot?
    medium rolled in paper, like a big cigarette, cut into pot sized pieces
  28. Name the 3 most important factors in plant propagation.
    • light
    • Temp
    • humidity/water
  29. Describe "interations" between factors of propagation.
    most common: light and Temp

    intensity factors: ie temp, light quantity

    controlling one factor effects one or more others
  30. What is a plant's microclimate?
    the area immediately around the plant
  31. What is the optimal wavelength of electromagnetic radiation spectrum for growth?
    380-750 nm
  32. Plants use ___ and ____ light for photosynthesis.
    blue and red
  33. plants use ___ and ___ light for photoperiodism
    red and far red
  34. photomorpogenesis is responsible for...
    normal stem and leaf growth. branching, leaf enlargement

    (Red and I Red)