First, iron deficiency. The new leaf melon turns yellow, but the veins are still green and generally do not wither quickly. But after a long time, the leaf edge will gradually wither. Correction method: Spray 0.3-0.5% ferrous sulfate solution on the foliar surface in time, spray once every 10-15 days, and spray 2-3 times.
Second, zinc deficiency. Generally, the plants are short, the new leaves are green, the veins are green, the leaves are yellow, and the leaves are narrow. Correction method: Foliar spraying with 0.05-0.1% zinc sulphate solution Each plant has a good effect by mixing 1 gram of zinc sulphate with an appropriate amount of decomposed fertilizer.
Third, magnesium deficiency. Firstly, the inward yellowing began from the sides of the leaf edge of the old leaves. As the degree of magnesium deficiency increased, the leaves showed yellow streaks, the leaves shrunk, the root group was small, the leaves were small, the flowers were small, the flowers were light, and the growth of the plants was affected. Inhibition, correction method: the leaves are sprayed with 0.2-0.4% magnesium sulfate solution 2-3 times, or 2-3 grams per calcium and magnesium phosphate fertilizer.
Fourth, manganese deficiency. The leaves are chlorotic and have motley spots; but the veins are still green and the color of the flowers is inferior. Correction method: Foliar spraying with 0.1-0.2% manganese sulfate solution, in order to prevent phytotoxicity, 0.5% quicklime can be added. Mix of sprays.
Five, sulfur deficiency. Most of the flower sulphur deficiency is yellow-green in the young leaves (not the yellow leaves usually turn yellow like the nitrogen deficiency), the plants are short, the stems are weak, the growth is slow, and the development of the plants is inhibited. Correction method: 2-3 grams of potassium sulfate per plant.
Sixth, calcium deficiency symptoms. The top bud is easily injured, the tip of the leaf, the leaf edge is dead, the tip of the leaf is often bent into a hook shape, and the root system is also necrotic. In severe cases, the whole plant is dead. Correction method: watering with 0.2-0.4% lime water solution, pouring 2-3 times, each time 20-30 ml per plant.
Practice has proved that trace element deficiency is generally the result of long-term non-replacement of soil, or long-term single application of nitrogen fertilizer. If you can use fertile potting soil and regularly change the pots and add soil, and pay attention to the application of organic fertilizer, the general flower is not lacking trace elements.
From:Flower China
Prevention and treatment of flower trace element deficiency
Flowers require a large amount of elements, such as nitrogen, phosphorus, potassium, etc.; other elements require relatively small amounts, such as magnesium, zinc, manganese, iron, copper, sulfur, boron, molybdenum and other trace elements. The trace elements required for flowers have different functions. If a trace element is lacking, it will cause disorder of flower physiology, leading to various symptoms of flowers, affecting leaf color and flower posture, and even weakening the plant and even dying. The following describes the symptoms and correction methods for the lack of trace elements in flowers for reference.
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