Presentation on theme: "Introduction to Greenhouse"— Presentation transcript:
1Introduction to Greenhouse Exploring Greenhouse Structures
2Warm UpWhat building material can you recognize in this photo?
3Essential QuestionWhat are the common greenhouse designs?
4Common Green House Designs 4 Common designsLean-toEven-SpanUneven-SpanRidge and Furrow
5Lean-to Greenhouseshares a wall with a building and relies on the building structure to provide some support for the greenhouse roof.
6Even-span GreenhouseSingle houses that have roofs with an even pitch and an even width.Hoop House/Quonset: common even-span greenhouse that uses arching pipes for the framework
7Uneven-Span Greenhouse Have unequal pitches and widths.Limited to hillside useRarely Built
8Ridge and Furrow Greenhouse Structures consist of a number of greenhouses connected along the length of the house.Shared interior walls reduce energy costs and allow for large interior spaces.Best oriented north and south to reduce permanent shadows on the crops created by the gutters.
10Greenhouse Framework Supports the greenhouse covering material Should be:Strong, allow for maximum amount of light to enter, require little maintenenceAluminum is most popularOther materials include wood, steel, angle iron
11Greenhouse Covering Covering= glazing Considerations Durable, light transmission, cost, heating effectivenessPossible materialsPolyethyleneStretched over greenhouse framework, cheap, not durable, not expensiveStructured sheetspolycarbonate, acrylic, and fiberglass materials have grown in popularity. Multi sheets= good insulation
12Structured Sheets Polycarbonate structured sheets most widely used, good light transmission, resist hail damage, easy to work withAcrylic structured sheetshigh light transmission, costly, prone to hail damage, and are less flexibleFiberglassdiscolors after 7 to 10 years, is flammable,and provides poor insulation
13Glass Considered best greenhouse glazing (covering) material Highest light transmissionLong lasting
14Headhouse Attached to the greenhouse Used as a storage area, a potting area, an office, and/or a shipping area.
15Retractable Roof Greenhouses Designs allow the roof to be opened and closed.Gives plants protection from weather when neededReduced watering, rainwater can be used
16Greenhouse Benches Holds the plants above the ground. Materials include:galvanized steel, aluminum, plastic, and rot resistant wood.Arranged in greenhouse with aisle space to walkRolling Benches:movable bench used to maximize growing space by limiting space for aislesbenches are placed on pipes, which allows them to be easily moved from side to side.
19Activities Review Quiz 1 Hand out project worksheet Go over Review QuizHand out project worksheet
20Introduction to Greenhouse Controlling Greenhouse Climate
21Warm UpWhy is this plant wilting? What does wilting mean?
22Essential QuestionWhat are the common greenhouse climate control systems?
23Heating Hot water heat system Steam heat heating water in a boiler and pumping the hot water through pipes located in the greenhouse located under benches, low maintenance, even heatSteam heatboilers that bring water to a boil and the resulting steam flows through pipes in the greenhouse
24Heating Unit heaters Infrared heat systems heat air within the unit, then blow the air throughout the greenhouse. Polyethylene tubes evenly distribute air flow, cost more to operateInfrared heat systemsproduce heat energy that is absorbed by the plants, media, and benches, do not heat the air, suited for high greenhouses
25Cooling Fan and pad cooling system Number 1 system, based on evaporation of water, pads at one end of the house are kept wet, fans at the other end of the house pull air through the pads. Air entering the house is cooled as water in the pads evaporates.
26Cooling Fog systems Vents involve an atomizer that produces water vapor, flash evaporation of this water cools the greenhouse.Ventsconsist of panels that open and allow air exchange with the outside, Natural cooling
27Energy CurtainAutomated systems using fabrics that can insulate a greenhouse at night and shade the crops during the dayInstalled gutter to gutter, run by computersShort-day curtainsSimilar to energy curtains, provides darkness that will simulate a short-day effect.
28Climate Control Systems Environmental controlsDevices used to turn greenhouse systems on and off, including heating and cooling systems.Includes:ThermostatsAnalog controlsComputer controlsComputerized environmental management systems
29Climate Control Systems Thermostats are low cost, easy to install environmental controls.On-off thermostats control fans, heaters, and vents with the change of temperatures.Analog controls use proportioning thermostats to run amplifiers and electronic circuitry.heating and cooling operations are integrated resulting in better performance
30Climate Control systems Computer controls use microprocessors to make complex judgments based on information from a number of sensors.Computerized environmental management systems, although expensive, are accurate and can control all the automated systems together.
31Vocabulary Analog controls Computer controls Computerized environmental management systemsEnergy curtainsEnvironmental controlsFan and pad cooling systemFog systemHot water heat systemInfrared heat systemPolyethylene tubesShort-day curtainsSteam heatThermostatsUnit heatersVents
32Activities Represent Heating and Cooling and Systems Review Quiz 2 Draw them on a separate piece of paper from your notes. This will be turned in.Review Quiz 2Go over Review Quiz
33Introduction to Greenhouse Automated Greenhouse Systems
34Warm UpWhat does this machine do? Why is it convenient?
35Essential QuestionWhat are some advantages of automated systems?
36Automated SystemsIncorporate technological developments in the production of greenhouse crops.Automated systems cut down labor costsAutomated systems allow for larger crops
37Automated Systems- Planting Automated pot fillersused to fill pots with medium, medium is lightly packed, and the pots are stacked or move down a conveyor for planting.Automated seederspermit the sowing of entire flats or plug trays in a few moments, trays move down a conveyor to a germination room or move to the greenhouseAutomated transplantersremove small plants from plug trays and transplant them directly to pots.
38Automated Systems- Transporting Transporting= most labor intensive partConveyor belt systems are used to move plants from one area of the greenhouse to another.Tray mechanization, has grown in popularity in the U.S.Individual trays or palletized benches that hold 100 pots or more roll on a series of rails from one area to another.
39Automated Systems: Watering Spaghetti tubingAutomated system that involves small tubes connected to a main lineEnd of each small tube is placed in a pot, and when functioning, dribbles water onto the medium.Allows flowers and foliage to stay dry
40Automated : Watering Drip irrigation a system like spaghetti tubing differs = provides a slow steady dripUsed with hanging basketsWastes less !!
41Automated: Watering Ebb and flood Watering involves watertight benches in which pots are setWater or nutrient solutions are pumped into the bench, the medium absorbs the water, and the water drains away.Little water loss, nutrient levels are easily adjusted, plant foliage kept dry
42Automated: Watering Capillary mats consist of porous mats placed on a bench and wetted.The medium in the pots absorbs the water through capillary action.Foliage stays dry, high humidity provided
43Automated: Watering Irrigation booms Move across the entire bench and well-placed nozzles flood the pots below as they pass over the plantsCommonly used with bedding plants, plug trays, and some potted flowering crops.
44Automated: Watering Overhead sprinklers Stationary sprinkler heads placed throughout the growing spaceLarge amount of water in a short period of timeOften used with bedding plants.
45Automated: Watering Intermittent mist systems Produce tiny droplets in the air for the purpose of keeping plant material wetCommonly used in the propagation phase of production to reduce water stress on cuttingsContinuous or programmed times
46Vocabulary Automated pot fillers Automated seeders Automated transplantersCapillary matsConveyor belt systemDrip irrigationEbb and floodIntermittent mist systemIrrigation boomsOverhead sprinklersSpaghetti tubingTray mechanization
47Activities Research Project Review Quiz 3 1 page SINGLE space paper, size 12 font, times new roman or comic sansWhich automated watering system is the best and why?Review Quiz 3Go over Review Quiz
48Introduction to Greenhouse Managing a Greenhouse Business
49Warm UpWhat types of jobs are conducted in a greenhouse?
50Essential QuestionWhat are the types of greenhouse businesses?
52Specialty GrowersProduce crops sold to wholesale or retail greenhouse growersSpecialize in one, or multiple cropsCan specialize in:Rooted cuttingsSeed productionBulbs for forcing
53Wholesale Growers Produce a limited number of crops Can Produce Cut rosesFoliage PlantsPotted flowering plantsProducts are sold to retail stores
54Retail GrowersGenerally produce a variety of crops sold directly to the public through their own retail outlet.
55Common Costs Direct materials costs Direct labor costs those costs including plant materials, pots, chemicals, and growing media.Direct labor costsbased on production activities such as planting crops, spacing crops, watering and fertilizing crops and managing pests and diseases.
56Common Costs Continued… Overhead costsdo not have a direct impact on the production of the crops.heating fuel, office management and secretarial support, taxes, depreciation, insurance, and utilitiesMarketing costsassociated with advertising, packaging products, shipping, and billing.
57Career Opportunities Greenhouse Manager Grower Marketing manager’s responsible for the total greenhouse operationGrowercharge of the day to day tasks involved in producing one or more crops.Marketing manager’ssell the cropsShipping room managerhandling a crop from the time it leaves the greenhouse until it is shipped.
58Skills Required Understand crops and how to care for them Mechanical SkillsUnderstand the marketDeliver plants in a healthy stateAdministrative SkillsGood understanding of local, state, and national laws pertaining to plant growing, sale, and transport
59Vocabulary Direct labor costs Direct materials costs Greenhouse managerGrowerMarketing costsMarketing managerOverhead costsProduction managerPropagatorRetail growersShipping room managerSpecialty growersWholesale growersVocabulary