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Hydroponics Powerpoint

Jan 18, 2016




  • Hydroponics

    Objective: Introduce students to growing plants in nutrient solutions

  • What is hydroponics?Practice of growing plants in _______ solutions with or without the use of _______ medium to provide mechanical supportTypesLiquid systems no support medium for rootsAggregate systems have a solid medium of support: _________, sand, gravel, vermiculiteOpen - nutrient solution not reused after delivery to plant rootsClosed surplus solution is recovered, replenished, and recycled

  • Hydroponics pros and consProsEliminates soil borne ________Allows control of water and nutrientsHigher quality plants with ______ and higher yieldsAble to grow vegetables in areas where otherwise is impossible

    ConsManagement is _______High costs if heating & artificial lights are needed_______ kcal for 1 kg tomatoes in greenhouse versus 1,865 kcal to ship 5000 kmEquipment expense

  • The Hanging Gardens of BabylonThe floating Gardensof the Aztecs of Mexico

  • History of hydroponicsControlled environment agriculture (CEA) first used for growing ________ under mica in 1st centuryGreenhouses & experimental hydroponics appeared in _______ and England during 17th century

  • History of hydroponicsUS 1925-1935New Jersey Agricultural Experiment Station improved sand culture methodCalifornia Agricultural Experiment Station used _______ and sand culture methods for large scale production__________& Arnon develop complete nutrient solution

  • History of hydroponicsSome use of hydroponics on _________ Islands during World War II______ popularized nutriculture (hydroponics) in the post-war period

  • History of hydroponicsHigh energy costs in early 1970s caused widespread ___________Late 1960s: nutrient _______ technique developed

  • Types of hydroponic systemsEbb and flow systemsContinuous drip systems__________ systemsNutrient film systems______ systemsWater culture

  • Ebb and flow systemsFloods growth tray with nutrient solutionDrains solution into reservoirPump and timer failures can dry out ______Uses medium such as _________ or rock wool to retain water

  • Continuous drip systemsMost popularNutrient solution dripped out to based of plant

  • Aeroponic systemsNutrient solution sprayed onto roots in ______ chambers where roots are suspended in _____Used at Epcot Center at Disney World

  • Nutrient film systemsConstant flow of nutrient solution through growing traySolution ________Roots are inside bag and hang in air when no solution recycled

  • Wick systemsSimplest designNutrient solution drawn into growing area through _____Large plants use nutrient solution faster than wick can provide

  • Water culture systemsPlants grow on platform with roots suspended into solution_______ bubbled into nutrient solution to provide oxygen for rootsDoes not work well with _____ plants or long-term growing

  • Growing vegetables and herbsVegetablesCommon lettuce, _______, cucumberRapid growing, good taste, high yieldTomato sometimes lack _______ Why?HerbsCommon basil, sage, ________, mintLack smell and taste

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