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Greenhouse Management

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Saw-tooth (Gutter connected) Advantages of Free Standing GH's. Isolate specific crops ... Of Gutter Connected GH's. More economical in terms of GH space utilization. ... – PowerPoint PPT presentation

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Title: Greenhouse Management


1
Greenhouse Management
  • History

2
Romans 500 BC
  • Emperor Tiberius- called for growing of
    cucumbers
  • Use of mica sheets
  • Underground cauldrons to generate heat through
    wall ducts

3
Dutch
  • Use of charcoal braziers/burners to generate
    heat
  • Leaders in shipping, foremost sea power.
  • Amsterdam worlds leading commercial city.
  • 1600s Golden Age
  • Today, largest GH industry in the world.

4
Europe
  • 1700 - English used heating frames to hold
    fermenting manure for heating
  • Utilized the roof angle at 45 degrees to maximize
    exposure to suns rays along with wood burning
    stoves.
  • 1851 - Crystal Palace led to building of many
    botanical/conservatories.

5
America
  • 1710 First documented greenhouse in Boston
  • 1730 Virginia
  • 1830 Use of hot air flutes to channel heat,
    also the use of hot water. Crops grown were
    orchids, ferns and some tropicals.
  • Glass imported from France

6
America (contd)
  • Late 1830s increased building of greenhouses.

  • Use of hot water became more popular
  • Use of glass and steel.
  • Glassmajor improvement
  • 1850s Craze for blue glass (?) Thought to be
    healthful for plants(?)

7
Current Greenhouse Utilization
  • 90 Florist Crops
  • 10 Vegetable Crops

8
Greenhouse
  • Refers to a structure covered with a transparent
    material to admit natural light for plant growth.
    May also include artificial heat. (US
    definition)
  • Structure admitting natural light but not heated
    (European definition). Also referred to as
    Glasshouse.

9
Greenhouse Structures
  • Even Span
  • A- Frame (free standing or gutter connected)
  • Quonset (free standing or gutter connected)
  • Uneven span
  • Lean-to
  • Uneven span
  • Saw-tooth (Gutter connected)

10
Advantages of Free Standing GHs
  • Isolate specific crops
  • Easy to control and isolate pests
  • Provide more varied environments

11
Disadvantages of Free Standing GHs
  • More expensive to maintain due to
  • More exposed area
  • Difficult to supervise labor
  • Inefficient use of land

12
Adv. Of Gutter Connected GHs
  • More economical in terms of GH space
    utilization.
  • Less structural materialsi.e. no side walls.
  • Better supervision of labor.
  • Possible to isolate sections.

13
Disadv. Of Gutter Connected
  • Harder to isolate pest outbreaks.
  • Difficult to grow crops with different cultural
    requirements.

14
Greenhouse Shapes
  • A-Frame
  • Quonset
  • Lean-to
  • Uneven Span
  • Gutter Connected
  • A-Frame
  • Quonset
  • Sawtooth

15
A- Frame (Hobby)
16
A-Frame (Commercial)
17
A-Frame Connected
18
Quonset-Gutter Connected
19
Arch/Gothic
20
Sawtooth
21
Structural Components
  • Ridge
  • Ventilator
  • Vent
  • Purlin
  • Eave
  • Rafter
  • Sash Bar
  • Side Post
  • Sill
  • Strut
  • Chord
  • Curtain/Foundation Wall
  • Bar Cap
  • Gutter
  • Knee Brace
  • Cross-tie
  • Bottom Chord

22
(No Transcript)
23
Truss Design
24
Covering Materials
  • Film Covering
  • Polyethylene
  • Vinyl
  • Polyester
  • Polyvinyl Fluoride
  • Rigid Covering Materials
  • Glass
  • Fiberglass Reinforced Panels (FRP)
  • Polyvinyl Chloride
  • Acrylic
  • Polycarbonate

25
Site Selection
  • Construction
  • Location
  • Room for Expansion
  • Topography
  • Land Use Prediction
  • Climate
  • Labor supply
  • Accessibility
  • Water
  • Orientation

26
Floor Plans
  • Quantity of crops to be grown
  • Bench types and arrangements/configuration
  • Heating elements
  • Location of post/support structures
  • Concrete floors
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