Plant Nutrition

Potassium Nutrient Info

Potassium - Quick Facts

  • Potassium activates more than 60 enzymes
  • Potassium regulates many essential processes in the plant including enzyme activation, photosynthesis, water use efficiency, starch formation and protein synthesis
  • Potassium is one of the best investments a grower can make in protecting a crop against disease, as it increases plant resistance to both biotic and abiotic stress factors.
  • Form used by plants: K+

Potassium - Role of Nutrient

  • Promotes stalk strength and standability and improves resistance to drought, disease and stress as it makes plant cells thicker.
  • Potassium controls stomatal opening and closing, preventing transpiration losses.
  • Increases seed and grain quality by reducing the infected seeds.
  • Regulates water status and activation of many enzymes
  • Involved in the formation and translocation of sugars, proteins, starch, and plant growth hormones.

Potassium - Nutrient in Soil

  • High levels of Ca and/or Mg can limit K uptake in some soils

Potassium - Deficiency Symptons

  • Tip and marginal leaf scorch - predominantly old mature foliage
  • Interveinal chlorosis throughout the leaf
  • Tendency to lodging - weak stalks in cereals
  • Retarded root growth & reduction in yield
  • Small and poorly coloured fruits, lacking flavour
  • Wilted appearance under dry conditions

Potassium - Factors Affecting Deficiency

  • Dry weather, poor drainage and compaction are factors that inhibit root growth and therefore reduce the availability of K.
  • Plants require varying amounts of K at different growth stages, particularly at later growth stages.
  • Magnesium, manganese, and calcium deficiencies become more pronounced with excess K.
  • High levels of Ca and/or Mg can limit K uptake in some soils

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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