Strictly "three management" greenhouse tomato good winter
Recently, readers consulted how to manage the tomatoes grown in greenhouses. For this reason, the reporter interviewed Zou Zhirong, a professor at the College of Horticulture, Northwest Agriculture and Forestry University. Zou Zhirong answered questions from three aspects: temperature management, light management, and water and fertilizer management.
Temperature Management “In the greenhouse, there will be more light during the day and more coverage in the evening, and attention should be paid to insulation and ventilation to reduce the humidity.†Zou Zhirong said that as the weather becomes colder and colder, farmers need to strengthen the maintenance work of greenhouses and inspect and repair the greenhouses, such as replacement. Damaged film, thick straw curtains, etc., to ensure the temperature inside the shed. It is worth noting that in terms of temperature and humidity control, it is necessary to ensure that the daytime temperature in the greenhouse does not exceed 30°C, and that it should not be less than 10°C at night, and the humidity in the greenhouse should not exceed 85%.
Light management should promptly uncover the cover of greenhouses and fill up the tomato crop when the weather is fine. “The curtain is usually open at 9:00am and the best shade is 4:00pm to ensure that the tomatoes in the shed have enough light for photosynthesis.†Zou Zhirong reminded that even if it is rainy, it should use the high temperature at noon to let the tomato. See the light for at least one hour to prevent the lack of light from causing damage to the tomato's growth.
Water and Fertilizer Management "Tomato irrigation must master a principle, that is, a small number of times, so that not only can control the humidity, temperature, but also help save water." Zou Zhirong told reporters that 15 to 20 days for an irrigation, drip irrigation, sub-film irrigation , Remember to not flood irrigation, in order to avoid the increase in humidity within the greenhouse, the temperature decreased, causing adverse effects on tomato growth. At the same time, after the tomatoes are set aside, a large amount of fertilization will be applied. Potassium fertilizer will be the main fertilizer, and for the poorly growing tomatoes, some nitrogen fertilizers may also be added. Usually 20-30 days fertilize once.
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