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Hort Irrigation 1
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Hort Irrigation 1

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  • 1. Irrigation Term: Turgidity Plant: Nandina
  • 2. Japanese Barberry
    • Shrub, deciduous
    • Hardiness Zones: 4a to 8a
    • Height: 3’ to 6’ by Spread : 4’ to 6’
    • Exposure: shade to full sun
    • Leaf Color: Green, Purple – Grown for Foliage not blooms
    • Has small red berries in fall
    • Grows very slowly
    • Looks like a red boxwood
    • Has small thorns
  • 3. Turgidity
    • ' Turgor pressure' or turgidity is the main pressure of the cell contents against the cell wall in plant cells and bacteria cells, determined by the water content of the vacuole
  • 4. Turgidity
    • Very important for plant strength & metabolism
    • A plant with low turgidity is “wilted”
    • Plants can recover if no vessel damage takes place
    • Metabolism and growth suffer if turgidity is lost
    • Supplemental water (irrigation) is required for any commercial production in VA.
  • 5. Types of Irrigation
    • Surface
    • Localized
      • Drip
      • Sprinklers
    • Sub-irrigation
  • 6. Surface Irrigation – Large Scale
    • Use gullies & aquaducts
    • Use flooding
  • 7. Subirrigation
    • Irrigation water is applied to the roots only through underground pipes
      • Areas with high water table
      • Greenhouses
    • Area is soaked for an interval and then water is removed by pumps & stored for next watering
  • 8. Localized
    • Drip
    • Soakers
    • Sprinklers
    • Misters
  • 9. Greenhouse Application
    • Ebb and flow
    • Prevents leaves from getting wet
    • Incomplete drainage may cause oxygen problems for root systems
  • 10. Capillary Mats
    • Similar to ebb & flow
    • Water is held in a saturated mat
    • Algae problems
    • http:// www.ebbandflowmat.com /
  • 11. Spaghetti tubing
    • Works great for medium and large containers
    • Doesn’t work well for small pots or cell packs
    • Can be used in greenhouses or outside nurseries.
  • 12. Spray/mist
    • Same delivery system
    • Change the head for different purposes
    • Mist for propagation
    • Sprinkler for growing
    • Also used for cooling and freeze protection
  • 13. Typical Drip Irrigation System
  • 14. Today
    • Read chapter 26. Pages 663 to 675
    • Answer in your notebook:
      • What plant processes require water?
      • Why would water in the soil be unavailable? How can you measure it?
      • When is the best time of day to water?
      • How can you tell when turfgrass needs water?
      • How many inches of water per week do grass & most plants need?
      • What is a pop-up sprinkler. Where is it used?
      • How deep should the water penetrate in good watering?