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Direct Seeding _ Indirect Seeding

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Direct Seeding _ Indirect Seeding Powered By Docstoc
					Bell Ringer:
   What factors will we have to
    consider before starting to plant
    outside in the spring?

   Volunteers to make a poster for
    the room….
                              GERMINATION
Textbook pages:
    96-101        - Direct Seeding & Indirect Seeding
Essential Questions:
   What factors determine the success of plants grown
    from the direct seeding method?

   What factors should be considered to successfully
    grow seeds indoors from seedling to mature
    plants?
    Quick Review:
   What are the essential conditions that must be
    met for germination to occur?

   What are the three main parts of a seed?
Additional Germination Processes
   Some seeds require additional mechanisms before
    they can begin germination and ultimately be
    transplanted.

     Stratification   - a required period of cold
      temperature
     Scarification - methods to break down the protective
      seed coat
Additional Germination Processes
   Stratification
       Especially important for plants that
        produce their fruit in the fall (like
        apples and pears).
       If these plants germinated
                                                       QuickTime™ a nd a
        immediately, they would die from                 decompressor
                                                are need ed to see this picture.
        the cold winter temperatures.
       Instead, these plants produce seeds
        that remain dormant until spring.
    Additional Germination Processes
   Scarification
       The seed coat must be broken down before germination can begin.
       Actions by Nature:
            Microbial Activity (bacteria, fungi, etc.)
            Freezing and Thawing
            Animal Digestion (stomach acids)
            Being stepped on or chewed                           QuickTime™ an d a
                                                                    decompressor
                                                           are need ed to see this picture .
       Actions by Humans:
            Sandpaper and File
            Acid
            Pressure and Force (for example, a hammer)
And now onto our essential
questions…
    Planting Seeds Outdoors
   Direct Seeding - method      QuickTime™ and a

    to plant flowers,
                                   decompressor
                           are neede d to se e this picture.


    vegetables, and grass
    seeds directly into the
    soil and their permanent                              QuickTime™ and a
                                                            decompressor

    location outdoors.                              are neede d to se e this picture.
    Planting Seed Outdoors
   Major factors that will determine the success of the plants
    grown from the direct seeding method:

•Site Selection
•Seedbed Preparation
•Planting Date
                                                          QuickTime™ a nd a
                                                            decompressor
                                                   are need ed to see this picture.

•Planting Depth & Spacing
•Moisture
       See the list on page 97 of your textbook for additional details…
    Planting Seeds for Transplanting
   Indirect Seeding - planting
    seeds indoors until they
    grow into seedlings then
    transplanting them into              QuickTime™ an d a
                                           decompressor
    larger containers or their    are need ed to see this picture.


    permanent location
    outdoors.
    Planting Seeds for Transplanting
   What do you predict will be the primary factors
    that affect germination and growth of plants
    indoors?
                            OXYGEN
    MOISTURE
             TEMPERATURE
                                      LIGHT
    Planting Seeds for Transplanting
   Seed quality includes both viability & vigor

      Viability - the ability of seeds to germinate under
       optimum conditions
      Vigor - the ability of seeds to germinate under
       different conditions and still produce healthy
       seedlings
* Quality seeds should have high viability of over a 75% germination rate. *
Exit Slip Questions:


 1. Name two factors that help the
success of the direct seeding method.

2. Why is scarification an important
part of the germination process for
some types of seeds?

				
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posted:6/14/2011
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