Expert organization in plant nutrition
Expert organization in plant nutrition
Aquaculture Deficiencies Products Pests Diseases Subject

Molibden deficiency and symptoms in plants

Among the nutrients required for plants, molybdenum is the lowest amount in the soil.  

The recoverable molybdenum content of a normal agricultural soil is about 0.2 ppm on a very rough average.

However, since the molybdenum requirements of the plants are very low, the amount of molybdenum present in most soils is sufficient to meet the requirements of the plants.

Therefore, molybdenum deficiency in plants is not common.

However, in plants grown on acid soils (pH less than 5.5), molybdenum deficiency is sometimes seen.

The presence of 0.1 ppm Mo in the plant is sufficient for the plant.  

Some plants have relatively higher molybdenum requirements.

Above all, dicotyledonous plants have higher molybdenum requirements than monocotyledonous plants.

Among the dicotyleton plants Cruciferae family plants, especially cauliflower molybdenum requirements are high.

Lettuce, spinach, tomato, beet and citrus species are also known to have high susceptibility to molybdenum.

Roots of legume plants The molybdenum requirements of symbiotic living Rhizobium bacteria are also important for legume plants because of high oil.

Molybdenum of cereals; Because of their high ability, these plants are not very sensitive to molybdenum deficiency.  

Since molybdenum deficiency inhibits nitrate assimilation, the manifestations of molybdenum deficiency are similar to the symptoms of nitrogen deficiency.

Old leaves turn yellow. However, unlike nitrogen deficiency, necrosis occurs rapidly on the leaf edges.

This is due to the accumulation of nitrate.

The width of the leaf to the moon decreases and different shaped leaves are formed.

For example, although the middle vein continues to grow, the rest of the leaf does not grow and leaves are formed like elongated flagella.  

In cauliflower necrosis occurs in the buyi cone and this region occurs, so the head does not occur.  

Between the veins in the leaves of citrus light yellow color, then turns into brown necrosis stains occur, and this is called yellow spot disease.  

Molybdenum deficiency is seen in acid soils, often seen with manganese and aluminum toxicity He.  

Molybdenum deficiency in acid soils is usually removed by calcification.

Molybdenum availability in the soil increases in parallel with the rise of pH of the soil with calcification.

If it is not necessary to raise the soil pH and therefore do not calcify, molybdenum fertilization may be necessary.

Molybdenum fertilization is mostly done through foliar fertilization.

A small amount of sodium molybdate or ammonium molybdate salts can be used to fertilize the soil.

For example, 2-3 g of field crops, 15-20 g is enough for 1 cubic meter of seedling.

This amount can be given by mixing with other fertilizers.