functions of a greenhouse horticulture ii: 7.01-8.02
TRANSCRIPT
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Functions of a Greenhouse
Horticulture II: 7.01-8.02
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What does a Greenhouse DO?
What are its functions?
- Make a list on the back of your handout.
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Basic Function
To provide a protective environment for crop production.
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Temperature range needs to be conducive to plant production. Ideal temperature 65 degrees-80 degrees
Moisture range is conducive to plant production Watering Humidity
Functions
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Pest Control Insects Diseases Weeds Rodents
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Nutrition In soil and water In air – ventilation is necessary to supply carbon
dioxide.
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Expenses
Labor is usually the greatest expense Heat is usually the second highest expense
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Greenhouse effect (front of HO)
The way greenhouses collect and store heat from the sun.
Radiant energy warms the greenhouse and its contents.
Greenhouses lose heat through the plastic, glass, etc. and additional heat has to be provided especially in winter.
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8.02-Temperature Controls
HeatersFansCooling PadsMechanical Air Conditioners
VentilatorsShade ClothFoggingMisting
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7.02-Environmental Controls
Thermostat-should be at plant level Aspirated-small fan blows air continuously over
temperature sensing unit for more uniform temperature Thermistor-use of computers to monitor
Light Photocell-measures light intensity (turns lights on and off) Timer-turns lights on and off at a certain time
Moisture Humidistat-controls fogging and misting to regulate
relative humidity
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8.01-Maintenance Items
Temperature Heaters-adequate clean fuel Thermostats working properly Fans, Fan motors, belts, etc-work Cooling pads-adequate water and clean Shade cloth-attached and is at right percentage
Light Shade Cloth-attached or removed Light bulbs-all work Photocells & Timers-work correctly
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8.01-Maintenance Items
Moisture Humidistat & Fogging/Mist Systems-work
properly Water lines & faucets-no leaks and adequate
source of high quality and clean water Sanitation
Diseases, Weeds & Insects-controlled by prevention methods
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8.02-Temperature, Light, & Moisture
Temp Controls Heaters Fans Cooling pads Mechanical air conditioners Ventilators Shade cloths & materials Fogging and misting
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Heaters , Fans and Cooling Pads
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Ventilators, Shade Cloths, Foggers and Misters
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8.02-Temperature, Light, & Moisture
Light Controls Lights Shade cloth Shade materials Black cloth
Moisture Controls Watering System Shade cloth Foggers Mist system Humidifiers