Vegetables are economically more profitable crops. Therefore, many vegetable farmers often invest a large amount of organic fertilizers and chemical fertilizers in order to obtain higher yields, resulting in accumulation of soil nutrients and physiological barriers to vegetables. Here, the physiological performances of common vegetables in greenhouses and greenhouses are briefly introduced as follows, so that the majority of vegetable farmers can achieve scientific fertilization.
First, cucumber
1. Yellowing between veins. Excessive application of phosphate fertilizer causes zinc deficiency.
2. Yellow and white between the veins. Excessive application of potassium fertilizer causes magnesium deficiency.
3, yellow and white between the veins, the leaf margin is still green. Excessive application of phosphate fertilizer caused magnesium deficiency.
4. The leaves undergo browning along the veins. Potassium deficiency caused by excessive application of phosphate fertilizer.
Second, tomatoes
1. Strip-like grooves appear on the surface of the stem, and even cracks appear, and the stem is hollow. Excessive application of nitrogen fertilizer causes a deficiency of calcium and boron.
2. The part of the fruit is necrotic, blackened and rotted. The absorption of calcium is affected by high temperature, dryness and excessive application of nitrogen or potassium fertilizer.
3. The fruit surface around the bracts is green. Excessive nitrogen application and dry climate cause potassium deficiency.
4, poor coloration, fruit brown with brown. Due to the accumulation of various nutrient segregants and poor drainage.
Third, eggplant
1. The sepals are longitudinally split and the corks are corked. Calcium absorption is affected by excessive application of nitrogen fertilizer.
2. The top of the fruit is sunken and hardened. Excessive application of nitrogen fertilizer affects water and the absorption of medium and trace elements.
3. The lower leaves or side branches have brown spots. Excessive manganese due to poor drainage.
Four peppers
The top of the fruit (the falling part) becomes black and soft. Calcium deficiency due to excessive nitrogen or potassium fertilizer and high temperature drying.
Five, cabbage
1. The inside of the ball is brown and rot. Calcium deficiency due to excessive nitrogen fertilizer.
2. In the early and middle stages of the ball, the leaf edge turns brown and rot. Calcium deficiency caused by excessive application of nitrogen fertilizer.
Six, Artemisia
The growth point turns brown, necrosis, and the plant height stops growing. Often due to excess phosphate and dry soil causes calcium deficiency.
Seven, spinach
1. At the beginning of the true leaves, the leaves are dark green, gradually brown, and fertility is inhibited. Due to excess phosphorus.
2. Yellowing or yellowing between veins. Excessive pH in the soil causes a deficiency in manganese. Especially after the rain is more obvious.
3. Yellowing of the leaf edge occurs. The reason is that excess manganese causes ferrite deficiency.
Eight, radish
1. The leaf margin of the middle leaves appears dark purple, and the veins gradually become brown. Soil high phosphorus causes other nutrient imbalances.
2. The center of the root is dark brown and gradually turns pale yellow. The soil has a high pH and too much calcium.
Nine, watermelon
1. Dark black spots appear on the leaves centered on the fruit section. Excessive application of potassium fertilizer causes magnesium deficiency.
2, vines, leaves long, the upper part of the vine becomes thick, difficult to be strong. Excessive application of nitrogen.
First, cucumber
1. Yellowing between veins. Excessive application of phosphate fertilizer causes zinc deficiency.
2. Yellow and white between the veins. Excessive application of potassium fertilizer causes magnesium deficiency.
3, yellow and white between the veins, the leaf margin is still green. Excessive application of phosphate fertilizer caused magnesium deficiency.
4. The leaves undergo browning along the veins. Potassium deficiency caused by excessive application of phosphate fertilizer.
Second, tomatoes
1. Strip-like grooves appear on the surface of the stem, and even cracks appear, and the stem is hollow. Excessive application of nitrogen fertilizer causes a deficiency of calcium and boron.
2. The part of the fruit is necrotic, blackened and rotted. The absorption of calcium is affected by high temperature, dryness and excessive application of nitrogen or potassium fertilizer.
3. The fruit surface around the bracts is green. Excessive nitrogen application and dry climate cause potassium deficiency.
4, poor coloration, fruit brown with brown. Due to the accumulation of various nutrient segregants and poor drainage.
Third, eggplant
1. The sepals are longitudinally split and the corks are corked. Calcium absorption is affected by excessive application of nitrogen fertilizer.
2. The top of the fruit is sunken and hardened. Excessive application of nitrogen fertilizer affects water and the absorption of medium and trace elements.
3. The lower leaves or side branches have brown spots. Excessive manganese due to poor drainage.
Four peppers
The top of the fruit (the falling part) becomes black and soft. Calcium deficiency due to excessive nitrogen or potassium fertilizer and high temperature drying.
Five, cabbage
1. The inside of the ball is brown and rot. Calcium deficiency due to excessive nitrogen fertilizer.
2. In the early and middle stages of the ball, the leaf edge turns brown and rot. Calcium deficiency caused by excessive application of nitrogen fertilizer.
Six, Artemisia
The growth point turns brown, necrosis, and the plant height stops growing. Often due to excess phosphate and dry soil causes calcium deficiency.
Seven, spinach
1. At the beginning of the true leaves, the leaves are dark green, gradually brown, and fertility is inhibited. Due to excess phosphorus.
2. Yellowing or yellowing between veins. Excessive pH in the soil causes a deficiency in manganese. Especially after the rain is more obvious.
3. Yellowing of the leaf edge occurs. The reason is that excess manganese causes ferrite deficiency.
Eight, radish
1. The leaf margin of the middle leaves appears dark purple, and the veins gradually become brown. Soil high phosphorus causes other nutrient imbalances.
2. The center of the root is dark brown and gradually turns pale yellow. The soil has a high pH and too much calcium.
Nine, watermelon
1. Dark black spots appear on the leaves centered on the fruit section. Excessive application of potassium fertilizer causes magnesium deficiency.
2, vines, leaves long, the upper part of the vine becomes thick, difficult to be strong. Excessive application of nitrogen.
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