Compared with Daejeon food crops, the economic benefits of vegetables are considerable. Therefore, in order to obtain higher yields, many farmers often use large amounts of organic fertilizers and chemical fertilizers at a cost, resulting in excessive accumulation of soil nutrients, causing physiological barriers to vegetables, especially in greenhouses and greenhouses. vegetables. The common physiological diseases of vegetables caused by over-application of fertilizers are as follows, and farmers may wish to place their seats in order to prevent them.
cucumber
Yellowing between veins, excessive application of phosphate fertilizer causes zinc deficiency.
Yellow and white veins, excessive application of potassium fertilizer cause magnesium deficiency.
Yellow and white veins between leaves but the leaf margin is still green, caused by excessive application of phosphate fertilizer, resulting in magnesium deficiency.
Leaf browning occurs along leaf veins, and excessive application of phosphate fertilizer causes potassium deficiency.
tomato
Bar-shaped grooves appear on the surface of stems, and even cracks appear. Vacancies are found in stems. Excess nitrogenous fertilizer causes calcium and boron deficiency.
The fruit falling part appeared necrotic, darkened and rotted. Due to high temperature, dryness and excessive application of nitrogen fertilizer or potassium fertilizer, the absorption of calcium was affected.
The fruit surface around the bracts is green, with excessive nitrogen application and dry climate causing potassium deficiency.
Poor coloration, fruit surface with dark brown, due to various accumulation of segregation and accumulation of poor drainage caused.
eggplant
Sepals longitudinally, corky, due to excessive application of nitrogen fertilizer affect the absorption of calcium.
The top of the fruit is sunken and hardened, and too much nitrogen is applied, which affects the absorption of water.
There are brown spots on the lower leaf or lateral branch leaves, causing excess manganese due to poor drainage.
chili
The top of the fruit (falling flower part) becomes black and soft, nitrogen fertilizer or potassium fertilizer is applied excessively and high temperature dryness causes calcium deficiency.
Chinese cabbage
The parts of the cabbage are browned and rotted, causing calcium deficiency due to excessive nitrogen application.
In the early and middle period of the package, the leaf margin becomes brown and rot, and calcium deficiency is caused by excessive nitrogen fertilizer and high temperature drying.
Black scattered small spots appeared on the epidermis of the main veins of the leaves of the bales, and there was a lack of sunshine. Too much nitrogen fertilizer caused poisoning of NO2.
The main veins and petioles of the leaves of the balsam root appear escarpated, and due to excessive calcium, the pH of the soil is too high, causing a deficiency of boron.
spinach
The leaves of the true leaves started to grow green and gradually turned brown. Fertility was inhibited, mostly due to excess phosphorus.
Yellowing or yellowing between the veins, the high pH value of the soil causes the deficiency of manganese, especially after the rain.
Yellowing occurs in the margins of leaves, which is caused by an excess of manganese and ferritin deficiency.
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