The so-called physiological death of cucumber roots means that the amount of lateral roots and hairy roots of cucumbers is significantly reduced, and the root xylem becomes brown or rot. The apparently dead roots can produce lateral roots after recovery over a period of time. Cucumber roots have two distinct physiology during the entire growth cycle. Sex death. The first physiological death was 15-20 days after flowering until the first fruit was harvested. At this stage, plant nutrients began to supply to the reproductive growth, because the fruit retains part of the nutrients, making the root system does not adapt to this change, so the amount of lateral roots and hairy roots of the plant has been reduced, improper management can lead to some roots browning or decay. Production can take the following preventive measures: root melon before harvesting roots to promote plant growth and balance; root melon early picking, so as not to fall smashing; root melon harvest before and after the management of fertilizer and water. The second physiological death began approximately in the middle and late stages of picking the melons, that is, the growing period of the plants reached about 100 days. After vigorously growing the plants, the roots began to gradually decline after the initial stage of human growth. The amount of roots decreased, the color of the upper leaves became lighter, the elongation of the leading faucet slowed down, the stems became weak, and the plant growth slowed down. If it is not managed properly, it will seriously affect the post-production and cause the plant to pull up early. Production can take the following preventive measures: 1. Increase organic fertilizer, improve soil pellet structure, provide good conditions for the growth of the root system. 2. The production of protected land should be cultivating, loosening the soil, increasing the oxygen content in the soil, and promoting root regeneration. 3. Regulate the relationship between vegetative growth and reproductive growth of the plant. Cultivation on this period should not allow the plant to fall into a large melon. 4. Strengthen plant nutrition and pest control, timely foliar dressing, and quickly replenish plant nutrition. Foliage topdressing can be carried out simultaneously with pest control. Once in 7~10 days, you can use amino acid foliar fertilizer, sweet and sour liquid (1 sugar, 1 part of urea, 1 part of potassium dihydrogen phosphate, 2 parts of vinegar) 50~100 Double fluid. After a large number of new roots occur, it gradually shifts to normal management. 5. Spraying auxin to promote new root fast hair, can be sprayed with 0.1% naphthalene acetic acid water 600 to 800 times. 6. Moisture management to see dry see wet is appropriate. Co2 Trolley Fire Extinguisher,Wheeled Co2 Fire Extinguisher,Carbon Dioxide Wheeled Fire Extinguisher,Co2 Wheeled Fire Extinguisher JIANGSU NEW FIRE FIGHTING TECHNOLOGY CO.,LTD , https://www.newayfire.com