323.t1 model agricultural core curriculum: supplement university of california, davis plant growth...
TRANSCRIPT
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323.T1
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Plant Growth Requirements
Plant Growth Requirements
• In order to grow well, plants must have basic needs met. These are:
– Proper temperature– Light quality, intensity, & duration– Moisture– Carbon dioxide (CO2)– Sixteen essential nutrients– Oxygen for respiration
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323.T2
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Plant Growth Requirements
Temperature
• Photosynthesis increases as the temperature increases.
• The plant’s uptake of minerals and water are effected by temperature.
• Plants have an optimum temperature for growth and development.
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323.T3
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Plant Growth Requirements
Temperature, (cont’d.)
• Plants have a minimum temperature below which they cannot live.
• High temperatures may dry out plants.• Plants should be chosen for the climatic conditions
of the area.
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323.T4
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Plant Growth Requirements
Light
Quality: Plants require white light or sunlight.
Chlorophyll absorbs red and blue light and reflects green light.
Intensity: Intense light provides sufficient energy for photosynthesis to occur.
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323.T5
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Plant Growth Requirements
Light (cont’d.)
Duration: Different plants require different exposure times to light in order to be productive.
Photoperiod is the length of time that the plant needs light.
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323.T6
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Plant Growth Requirements
Moisture
• Soil moisture carries minerals and nutrients from the soil into the plant via the xylem.
• Water is used in chemical reactions such as photosynthesis.
• Turgor is the pressure which allows the plant to stand erect, is provided by water within the cell.
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323.T7
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Plant Growth Requirements
Moisture (cont’d.)
• Water cools the plant via transpiration.
• Water moves (translocates) products that are produced by photosynthesis from the leaves to the rest of the plant via the phloem.
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323.T8
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Plant Growth Requirements
Carbon Dioxide (CO2)
• Carbon Dioxide is absorbed through the stomata.
• It is used in photosynthesis to produce sugars for the plant.
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323.T9
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Plant Growth Requirements
Essential Nutrients
• Primary– Nitrogen (N)– Potassium (K)– Phosphorus (P)
• Secondary– Calcium (Ca)– Sulphur (S)– Magnesium (Mg)
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323.T10
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Plant Growth Requirements
Essential Nutrients
• Trace Elements– Manganese (Mn)– Iron (Fe)– Copper (Cu)– Chlorine (Cl)– Boron (B)– Molybdenum (Mo)
• Atmospheric Nutrients– Carbon (C)– Hydrogen (H)– Oxygen (O)