Plant Nutrition

Nitrogen Nutrient Info

Nitrogen - Quick Facts

  • Nitrogen is required for production of chlorophyll, nucleic acids, and enzymes.
  • Nitrogen is essential for plants to synthesize amino acids, which are the building blocks for protein synthesis.
  • These amino acids are then used in forming protoplasm, which is used in cell division and also utilized in producing necessary enzymes and structural parts of the plant and can become part of the stored proteins in the grain.
  • Form used by plants: NO-3 or NH+4

Nitrogen - Role of Nutrient

  • Primary building block for all plant parts – leaves, shoots, roots, fruit buds, etc.
  • Promotes rapid growth.
  • Enhances nutrient uptake.
  • Increases protein content in plants.
  • Nitrogen combined with high concentrations of chlorophyll utilizes the sunlight as an energy source to carryout essential plant functions including nutrient uptake.

Nitrogen - Nutrient in Soil

  • Uptake of nitrate or ammonium creates increased or decreased root medium acidity:
    • 3NO-3→ 3NH2 + 2OH- (increases soil pH)
    • 3NH+4→ 3R-NH2 + 4H+ (decreases soil pH)

Nitrogen - Deficiency Symptons

  • Slow growth and stunted plants
  • Chlorosis (a yellowing) of the leaves starting from older ones due to the declining chlorophyll
  • Starts with mature leaves - firing of tips and mid rib of foliage
  • Excess nitrogen results in reduced quality and delayed colouration.
  • Tillering and leaf size are reduced in cereals

Nitrogen - Factors Affecting Deficiency

  • Additions of organic matter (manure, crop residues) will immobilize Nitrogen.
  • Leaching of nitrate can move N out of the root zone.
  • Soil moisture affects N in that too much results in saturated soils and denitrification, causing limited root development and movement of soil water and thus nutrients.
  • Excess ammonium also decreases the availability of Nitrogen to the plant.
  • Toxicity symptoms include excessive shoot growth, large, succulent, dark green leaves, profuse flowering, poor colour development, prolonged growth into fall and higher susceptibility of winter injury and leaf diseases.
  • Heavy N fertilization intensifies copper and zinc deficiencies

R3 Agronomic Platform

R3 Lifecycle: Roots > Reproduce > Ripen

Roots – The vegetative stage looks to develop vigorous, healthy roots to maximize nutrient acquisition from the soil. The end result is a healthy root rhizosphere.

Reproduce – Supply the essential nutrients at reproduction to help the plant maximize pollen viability, flowering, pollination, seed set and fruit development.

Ripen – Late season nutrition is vital to optimize the nutrient density and quality of the crop.

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