Absorbed from the soil in the form of ZN + ions, the substrate in the surface layers is high and reduced with action. Zinc solubility in the soil is correlated with pH, we note the symptoms of zinc deficiency currently associated with iron deficiency symptoms on citrus.
Zinc guest in the plant:
- Plays a role in stimulating the enzymes.
- Plays a key role in the formation of NA DNA and ribosomes.
- Helps elongate plant leg and stimulate growth regulator action.
Symptoms of zinc deficiency:
- Yellow spots between the veins with remnants of parts around the green veins.
- The new leaves are short, small and elongated in pink clusters coming out of short branches.
- The death of citrus branches.
- The presence of oil stains in the leaves of citrus and small in the size of fruits and the thickness of their skin.
- The ability of trees to form fruit shoots and fruits is impaired.
Quantity and sources of zinc in the soil:
The earth's crust contains about 80 ppm of zinc, and the soil content of zinc ranges between 10-300 ppm. The most important metals containing this element are sulphides, carbonates, secondary clay minerals and organic matter.
Factors Affecting Zinc Validity of Plants:
- Number of soil acidity.
- Adsorption on colloidal surfaces.
- Soil content of organic matter.
- Soil content of phosphate.
Zinc fertilizers: -
- Zinc sulphate.
- Zinc Oxide.
- Zinc phosphate.
- Treatment of zinc deficiency:
- It is treated with zinc sulphate spray in the case of mild injury. In severe cases, zinc shale is used.