Vegetables are more economically efficient crops. Therefore, in order to obtain higher yields, many farmers often put too much organic and chemical fertilizers, resulting in excessive accumulation of soil nutrients, causing physiological obstacles to vegetables, especially greenhouses, greenhouse common physiological vegetables cultivation The disease performance is described as follows, so that the majority of vegetable farmers do scientific fertilization. Nonwoven Coated PE Film With Glue Nonwoven Coated PE Film With Glue,Disposable Surgical Drapes,Laminated Nonwoven Fabric,PE Film Laminated Breathable XINLE HUABAO MEDICAL PRODUCTS CO.,LTD. , http://www.golbaltravel.com
One, cucumber
1. Yellowing between veins. Excessive application of phosphate fertilizer causes zinc deficiency.
2. Yellowing and whitening between veins. Excessive potassium fertilizer causes magnesium deficiency.
3. Yellow and white veins between leaves, the leaf margin is still green. Excessive application of phosphate fertilizer, resulting in magnesium deficiency.
4. The leaves are browned along the veins. The reason is that excessive application of phosphate fertilizer causes potassium deficiency.
Second, tomatoes
1. There are striped grooves on the stem surface, and even cracks appear. Excessive nitrogen fertilizer causes the deficiency of calcium and boron.
2. Necrosis, darkening, and rot in the fruit falling part. Due to high temperature, dry and excessive application of nitrogen fertilizer or potassium fertilizer, the absorption of calcium is affected.
3. The fruit surface around the bract is green. Excessive nitrogen fertilizer and dry climate cause potassium deficiency.
4. Poor coloration, fruit surface with dark brown. Caused by a variety of nutrients and poor drainage.
Third, eggplant
1. Sepals longitudinally, corky. Due to excessive nitrogen fertilizer, calcium absorption is affected.
2. The top of the fruit (falling part) is sunken and hardened. Too much nitrogen fertilizer will affect the absorption of water.
3. There are brown spots on the lower leaves or lateral branches. Excess of manganese caused by poor drainage.
Fourth, the top of the pepper (falling flower parts) becomes dark and soft. Excessive calcium or potassium and high temperature drying cause calcium deficiency.
V. Cabbage
1. The inside of the ball is browned and rotted. Excessive nitrogen fertilizer causes calcium deficiency.
2. In the early and middle period of the ball, the leaf margin becomes brown and rot. Excessive nitrogen fertilizer causes calcium deficiency.
Six, cabbage
1. The parts of the cabbage are brown and rot. Excessive nitrogen fertilizer causes calcium deficiency.
2. In the early and middle period of the package, the leaf margin becomes brown and rot. Due to excessive nitrogen fertilizer and high temperature drying caused by calcium deficiency.
3. Black scattered small spots appear on the epidermis of the main veins of the covered leaves. Insufficient sunshine, excessive nitrogen fertilizers cause poisoning of NO3.
4. The main veins and petioles of the balsam leaves appear squid-like. It is due to excessive calcium, soil PH value is too high, causing a lack of B.
Seventh, the growing point of Artemisia annua becomes brown and necrotic, and plant height stops growing. Often due to excessive phosphate and dryness causes calcium deficiency.
Eight, the heart of the celery plant turns brown and rot. It is the lack of calcium caused by excessive nitrogen fertilizer or potassium fertilizer.
Nine, spinach
1. In the initial stage of true leaf development, the leaves were dark green and gradually browned, and fertility was inhibited. Caused by excess phosphorus.
2. Yellowing or yellowing between veins. High soil pH causes a lack of manganese, especially after rain.
3. Yellowing of new leaf margins. The reason is that excess manganese causes ferritin deficiency.
Ten, radish
1. The leaves of the middle leaves appear dark purple and the veins gradually become brown. High phosphorus in the soil causes other nutrient imbalances.
2. The center of the root is dark brown and gradually turns pale yellow. Soil pH is high, and calcium is too much, causing a lack of boron.
Eleven, watermelon
1. Small dark spots appear on the leaves centered on the fruit-setting section. Excessive potassium application causes magnesium deficiency.
2. The vines and leaves are long, and the upper part of the vine is thicker and harder to bear. Caused by too much nitrogen.