Tomato winter attention Wenguang water and fertilizer control
With the winter entering, the illumination time will be shorter, the night temperature will be lower, and the humidity in the shed will gradually increase. Some diseases at low temperature and high humidity will easily occur, which will adversely affect the normal growth of tomatoes. The winter management tomato is introduced below. Technical points:
Temperature management. After entering the winter, tomatoes in greenhouses should be focused on heat preservation and temperature increase. Low temperatures will cause tomatoes to fall, fruits, and even freeze damage. The fruit setting rate will be greatly reduced, which will seriously affect the yield. In the event of heavy snowfall or high winds, the temperature can be increased by using coal stoves, heating, or artificial supplemental lighting.
Light and ventilation. Tomatoes are hi-light crops. When the light is sufficient, the plants grow vigorously and have strong resistance to disease. On the contrary, it will cause the plant to grow in length and grow weakly. It will also create conditions for the infection of diseases. It can be used to hang a light curtain on the back wall, regularly clean the dust or dirt on the film, and remove the droplets in the film, so as to increase the light in the shed. Ventilation can achieve the purpose of dehumidification, ventilation and temperature adjustment. Ventilation time should be adjusted according to the weather conditions. Every day must ensure a certain ventilation time, in order to facilitate the normal growth of plants.
Watering and fertilizing. Watering should be done in combination with topdressing. You can't just pour water. Fertilizer can not use single element fertilizer, it is best to use ternary compound fertilizer or fertilization, timely nutrition supplement full of rich fertilizer, can provide the necessary nutrients for tomato growth and development, or prone to physiological diseases, to choose continuous sunny, And the amount of watering should be small, the time is generally selected in the morning or at noon.
Prevent disease. Winter is a period of high incidence of Botrytis cinerea, late blight, and bacterial diseases. It should be prevented, and usually spray once every 5-7 days. Pyrimethanil, streptomycin, thiophanate-methyl, or ethidium can be used. Wei + Streptomycin + Difenoguanidine, etc. to achieve several formulas of alternate use of agents.
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