Zinc has the power to impact many important processes including stomatal activity, photo assimilate movement, disease resistance and insect infestation, and overall plant growth and yield.

Quick Facts About Zinc

  • Zinc activates or is a component of several enzymes and therefore affects many metabolic processes in the plant.
  • As a component of enzymes, Zinc catalyzes the synthesis of fructose-6-Phosphate, an important metabolite in glycolysis and therefore photosynthesis.
  • Affects the indole-3-acidic acid content which is important for regulation of plant growth.
  • Zinc plays an essential role in ATP and protein synthesis.
  • Zinc is an essential component of RNA polymerase which catalyzes RNA synthesis, which in turn affects production of proteins.
  • Form used by plant: Zn+2.

Role of Zinc in Plants

  • Aids plant growth hormones and enzyme systems.
  • Helps in pollination and seed formation.
  • Necessary for protein synthesis and membrane function.
  • Influences plant hormone proteins, for example auxin development, especially IAA.
  • Active in chlorophyll synthesis & manufacturing of carbohydrates.
  • Causes healthy root growth, leading to enhanced grain yield.
  • Important for cellular defence systems against toxic oxygen free radicals (SO).

Zinc Deficiencies:

Deficiency Symptoms

  • Leaves are smaller and narrower than normal (“little leaf”), and their tips are often white . The entire plant is often stunted (dwarfism).
  • Malformation of foliage and reduced fruit set.
  • Yellow or chlorotic striping.
  • Older and middle leaves display chlorotic spots with necrotic areas.
  • Shortened internode.
  • In fruit crops, “rosette” or “little leaf” development occurs because of jammed internodes.
  • The growth of sprigs is inhibited and young shoots die.
  • Premature leaf senescence can also occur.
  • Leaf roll in potatoes.

Factors Affecting Deficiencies

  •  Low organic matter soils, high pH soils, light and sandy soils.
  • Excessive Sulphate and Phosphate content in the soil solution will result in immobilization of Zinc.
  • Under anaerobic conditions, Zinc can be precipitated into sulphide form which is largely unavailable to plants.
  • Conditions in which restrict root development such as compacted and cold wet soils, will negatively affect Zinc availability.
  • High available Phosphorus can accentuate Zinc deficiencies as well as high Nitrogen fertilization.
  • Very high Potassium levels may also include Zinc deficiency. 

Zinc Recommended Products

Product Type Details
PreCede Canola
Seed Nutrition
PreCede Cereal
Seed Nutrition
Ruff-Tuff Crop Mix ll
Micronutrient Soil
Ruffin-Tuff Zinc
Micronutrient Soil
Micro-Che Zn
Micronutrient Soil
Transit RxZn
Micronutrient Soil
Kinetic Zinc
Macronutrient Foliar
ReLeaf Soybean
Macronutrient Foliar
42PHI Canola
Macronutrient Foliar
42PHI Rhizo
Macronutrient Foliar

Nutrient Knowledge Guide

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