Potassium (K)

Potassium is the second important element after nitrogen. Potassium is an essential plant nutrient and is required in large amount for proper growth and reproduction of plant. It affects the plant shape, size, color and taste of the fruit. Plants absorb potassium in its ionic form K+.
Potassium has many different roles in plant:
- In photosynthesis, potassium regulates the opening and closing of stomata and therefore regulates CO2 uptake.
- Potassium triggers activation of enzymes and is essential for production of Adenosine Triphosphate (ATP). ATP is an important energy source for many chemical processes taking place in plant issues.
- Potassium plays a major role in the regulation of water in plants (osmo-regulation). Both uptake of water through plant roots and its loss through the stomata are affected by potassium.
- Known to improve drought resistance.
- Protein and starch synthesis in plants require potassium as well. Potassium is essential at almost every step of the protein synthesis. In starch synthesis, the enzyme responsible for the process is activated by potassium.
Potassium 1
Potassium deficiency might cause abnormalities in plants; usually the symptoms are growth related.
Potassium deficiency symptoms:
- Chlorosis,
- Slow or stunted growth,
- Poor resistance to temperature changes and to drought,
- Defoliation,
- Poor resistance to pests,
- Weak and unhealthy roots and
- Uneven ripening of fruits.
Potassium 2
For detailed information please visit the premises of Horticentar – Greenhouse training center.