Lecture 4_class copy - Plant Growth Environment Above...

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Plant Growth Environment: Above Ground: Climate Below Ground: Soil
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CLIMATE CLIMATE Temperature Precipitation Humidity Light Wind
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CLIMATE Temperature: Gainesville, FL Last Frost: March 29 First Frost: November 5 Frost free period: 221 days Limits where plants can grow
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CLIMATE Precipitation FL rainy season lasts from May– Nov Rain needed during growing season Rain during harvest can cause problems Snow insulates Sleet & hail cause damage Dew (when air is warm and humid) - hydrates, but also spreads disease Humidity 50-70% RH on a 90 ° day High humidity reduces water loss from stomates
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Light Energy for photosynthesis Long-day vs. short-day vs. day neutral plants Wind Damaging at high levels Affects humidity Spread airborne pathogens Pollination of flowers Replenish CO 2 levels for photsosnthesis Air pollutants CLIMATE
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CLIMATE Temperature Precipitation Humidity Light Wind Elevation Terrain Bodies of water Human modifications Factors that modify climate…
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Getting Water to the Plants Large quantities of water for successful growth Rainfall Inadequate Inconsistent Irrigation
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Water Requirements Water frequency and amount Depends upon: Total available water in root zone and rate of water usage Rainfall Plant age and rooting depth Soil type Evapotranspiration rate Humid areas: 1-2 in/week Hot, dry, windy areas: 2-3 in/week Arid areas: 4 in/week www.bae.ncsu.edu
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Types of Irrigation Systems Sprinkler Surface Flood Furrow Seepage Drip (Trickle)
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Sprinkler Irrigation
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Flood Irrigation
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Furrow Irrigation
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Furrow (Surge) Irrigation
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Drip Irrigation http://www.oznet.ksu.edu/library/hort2/samplers/MF1090.asp
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