The method of prevention and treatment of iron deficiency in pansy
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Occurrence conditions
1) Iron deficiency is prone to occur when the soil pH is high.
2) Due to too much phosphorus, iron absorption is affected and iron deficiency is also prone to occur.
3) When the soil is too dry, too humid, and low temperature, iron deficiency may also occur due to the influence of the root activity.
4) When copper and manganese are too much, it is easy to produce antagonistic effects with iron and iron deficiency symptoms may occur.
Control methods
1) Take corresponding measures based on soil diagnosis results. When the pH reaches 6.5-6.7, it is forbidden to use lime instead of using physiological acidic fertilizers. When there is too much phosphorus in the soil, deep plowing, soil and other methods can be used to reduce the content. In the case of hydroponics, ferric citrate solution may be added to the culture broth at a concentration of 3-4 ppm and chelated iron solution (EDTAFe) at a concentration of 1-2 ppm.
2) Emergency measures: Spray 0.5% ferrous sulfate solution evenly.