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Nutrition of Greenhouse & Nursery Plants Original Power Point Created by Carlos Ramos Modified by Georgia Agricultural Education Curriculum Office June 2002 Nutrition We all eat Why? To survive What if we didn’t eat? Plants have the same needs as we do Fertilization Objectives

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nutrition of greenhouse nursery plants

Nutrition of Greenhouse & Nursery Plants

Original Power Point Created by Carlos Ramos

Modified by Georgia Agricultural Education Curriculum Office

June 2002

nutrition
Nutrition
  • We all eat
  • Why?
  • To survive
  • What if we didn’t eat?
  • Plants have the same needs as we do
  • Fertilization
objectives
Objectives
  • To recognize the importance of plant nutrition
  • Identify the essential nutrients and fertilizers needed for plant growth
  • Discuss the difference between Micro and Macro nutrients
  • Determine availability of nutrients
fertilization
Fertilization
  • What is a fertilizer
  • Why is it important
  • Fertilizer is a product made of elements that are required or beneficial for plant growth
  • Plants stay healthy and are maintained in vigorous growing condition
    • Are less susceptible to pests and diseases
nutrient requirements
Nutrient Requirements
  • Nutrients are required for plant processes to function
    • Transpiration
    • Respiration
    • Photosynthesis
nutrients availability
Nutrients Availability
  • The nutrients required for growth are absorbed by the plant roots
  • Nutrients from growing medium are depleted
  • In addition some nutrients are attracted so tightly by soil particles that they are not available for plant use
nutrient loss
Nutrient Loss
  • Nutrients are lost in many ways
    • Depleted by plants
    • Used by microorganisms
    • Leached because of watering
    • Conversion to gaseous form
fertilizer use
Fertilizer Use
  • Fertilizer returns nutrients to growing medium
  • Adequate levels of nutrients increases the health and quality of plants
  • Increases the yield of plant crops
  • Promotes foliage of ornamental crops
essential element
Essential Element
  • What is an essential element?
    • an element required by plants for normal growth, development and completion of its life cycle, and which cannot be substituted for by other chemicalcompounds.
  • Classified based on quantity required
    • Macro-nutrients
    • Micro-nutrients
  • Both are equally important
essential elements
Macro-Nutrients

Carbon

Hydrogen

Oxygen

Nitrogen

Phosphorous

Potassium

Calcium

Magnesium

Sulfur

Micro-Nutrients

Iron

Copper

Zinc

Boron

Molybdenum

Manganese

Chlorine

Nickel

Essential Elements
non mineral elements
Non-Mineral Elements
  • Elements that are supplied air and water
  • Carbon
  • Hydrogen
  • Oxygen
mineral elements
Mineral Elements
  • Are supplied by soil or growing medium
  • Remainder of nutrients
primary nutrients
Primary Nutrients
  • Those elements which the plant consumes in largest amounts
    • Nitrogen (N)
    • Phosphorous(P)
    • Potassium(K)
  • Most deficient in the soil
secondary nutrients
Secondary Nutrients
  • Not used by plants in as large quantity as primary nutrients
  • Not as deficient in soils
  • Calcium
  • Magnesium
  • Sulfur
micro nutrients
Micro-Nutrients
  • Needed by plants in very small quantities
  • Removed from soils in much smaller amounts
  • Considered trace minerals
slide16
All elements have specific functions in the growth and development of plants
  • When a nutrient is deficient, what do you think happens to the plant process that is being supported by that nutrient?
  • Process is slowed down or stopped
determining availability of nutrients and the need for fertilizer
Determining availability of nutrients and the need for fertilizer
  • Visual
    • Most obvious
    • Less accurate
    • Trained eye required
  • Soil/Media testing
    • Tests soil nutrients
  • Tissue testing
    • Tests nutrients in plant