Properties of magnesium in the fertilization of the vine.
Magnesium is a component of chlorophyll that is involved in the synthesis of carbohydrates.
What are the effects of magnesium on the fertilization of vine plants?
Fertilization of the vine magnesium: Magnesium participates in the absorption and migration of phosphorus and improves the uptake of iron in vine plants.
What are the effects of magnesium deficiency or deficiency?
Its deficiency is manifested as:
– Chlorosis in the old leaves at the base of the shoots, these can fall prematurely causing the emission of “grandchildren”.
– Yellowing of the edge of the leaf, progressively spreading to the internervial area, with a well-defined delimitation and the nerves and areas close to them remain green.
The symptoms are more accentuated in leaves close to the bunches.
The bunches of grapes appear loose with an evident loss of weight.
The deficiency is produced both by deficiency and by antagonism with calcium and potassium. Magnesium deficiency can manifest itself in light and acid soils subjected to washing or in soils that have received very strong potassium fertilizers.
What are the effects of Excess Magnesium on vine fertilization?
Its excess hinders the assimilation of potassium which can lead to an induced deficiency of this element by antagonism. It is important to perfectly distinguish the deficiency caused by potassium from that of magnesium, since being antagonistic elements a wrong diagnosis and correction causes an aggravation of the problem.
Fertilization of the magnesium vine: As a general rule, it should not be provided unless it is certain that there is a deficiency.
Recommended practice fertilization of the magnesium vine.
Rupestris de Lot, 41-B and 140 Ru rootstocks resist magnesium deficiency well, unlike 110 Richter and SO 4, which are not very resistant.
It may also be interesting to visit another of the following articles on vine fertilization published in this viticulture blog:
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