1- POTASSIUM in vine fertilization.
2- Properties of potassium in the subscriber of the vine:
Potassium is considered an element that favors the production and quality of the grape.
3- Effect of potassium on the plant.
Potassium intervenes in respiration, in the assimilation of chlorophyll, in the transport and accumulation of carbohydrates to the bunches, thus increasing the sugar content and consequently the degree.
- It also participates in the different parts of the plant to form reserves, contributing to greater longevity and increased resistance to drought.
- It is a factor of vigor and performance , since it participates in the neutralization of the organic acids formed, favors respiration and activates growth.
- Potassium is a quality factor , as it intervenes by increasing photosynthesis, migration and the accumulation of sugars in the fruits.
- It is a factor of plant health, as it facilitates the proper distribution of reserves between the different parts of the plant.
- It intervenes in the regulation of the opening and closing of stomata, it is a factor of resistance to drought . It does not allow a reduction in water consumption but rather greater water efficiency due to superior extraction and an improvement in photosynthetic activity.
- It favors the fruit set and advances the maturation.
- It is an element of protection against frost .
- Due to its intervention in the salification of tartaric acid , it has been attributed the responsibility of raising the pH of the musts.
4- Potassium deficiency or deficiency in vine:
The lack of potassium in the vineyard produces a discoloration of the edges of the leaves starting with the youngest leaves, they roll up from the veraison and the white and reddish varieties take on a yellowish appearance in the inks.
In extreme cases there is desiccation and premature leaf fall, which prevents a good ripening of the grape and good withering of the vine, which can even affect the next sprouting.
5- Excess of potassium in vineyard:
Potassium is an antagonistic element with magnesium so that an excess of any of them inhibits the assimilation of the other. This can cause a deficiency state of the most deficient element, even when there are levels of both in the soil that under normal conditions would be considered sufficient.
Very high levels of potassium can be the cause of the appearance of magnesium deficiencies, due to the antagonism of these two elements.
6- Dosage and Amounts per Ha
The needs subscriber potassium viticulture rainfed vary between 40 and 150 UF / ha can reach irrigated 240 UF / Ha.
Click here to find out what a UF or Fertilizer Unit is .