Basic function of potassium is regulation of plants` water management. Sufficient supply of this element facilitates the plants to survive periods of drought, protects them from withering and drying. Potassium facilitates plants condition and enhances frost resistance of perrenial plants (trees, bushes etc.).
Potassium is one of the most important nutrients for the plants, which is responsible for their harvest and quality. In Poland potassium fertilization is not sufficient, even though its role for the plant is very important.
Potassium effects many important processes e.g.:
The fruits from the plants properly nourished with potassium are sweeter and have richer aroma, colour and are better for storage. The same refers to ornamental plants. Optimal doses of this element increase numer, size and colour of flowers. The plants properly nourished with potassium have good effect on human and animal health thanks to increase of potassium content in their diet.
Deficiency of potassium in plants causes reduction of conversion of mineral nitrogen into proteins. What is also effected is plant growth. On the leaves surface there appear stains between leaf veins, which differ in appearance for different plants. At first they become dark and dull, with chlorosis on tips of old leaves. The leaves` surface curles, cracks and then get's brown.
The plants especially sensitive for potash deficiency are tomatowes, pepper, cereals, sugar beets, potatoes, rape, pease, beens, cabbage, califlower, leeks, onion, lettuce, trees and fruit crops and berries. The following photos present the examples of potassium deficiencies in plants: curling and brown leaves, uneven colouring of tomato and improperly grown cucumber.
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