Most of the tomatoes in the solar greenhouse have entered the fruiting period in the autumn. At this time, the management focuses on controlling cranberries and promoting fruit, improving quality and yield. The key technical measures for its production management are:
Temperature control: In the flowering period of tomato, the suitable temperature is 25-30 degrees Celsius during the day, 20-15 degrees Celsius at night, less than 15 degrees Celsius or higher than 35 degrees Celsius, all of which are likely to cause drop, fruit drop or physiological malformation. Therefore, if the temperature is too high, you should shade or increase ventilation during the day. The temperature is too low and should be covered with film at night. The suitable temperature difference between day and night is 12-20 degrees Celsius.
Moisture control: At this time, the seedling stage has passed and the water requirement has increased significantly. Avoid drying and dampening to ensure a balanced supply of water.
Fertilization: combined with watering, pay attention to the application of calcium nitrate and potassium sulfate, to prevent excessive stalk rot caused by nitrogen, calcium deficiency caused by rot and bacterial diseases. At the same time, bovoid air defense hole fruit, zinc and anti-aging aging.
Prevention: At this time, we mainly prevent blight and virus disease. When a virus is found in the field, it should be sprayed and controlled in time. The ratios of the medicines are: (1) anti-disease or virus K25 ml + medical virus spirit 15 tablets + virus A or anti-virus 30 g + natural element 2 grams + 15 kilograms of water. (2) Phytopathology Ling 15 ml + medical virus Ling 15 tablets + agricultural streptomycin 3 g + zinc sulfate 50 g + a-naphthalene acetate 20 ppm + 15 kg water. The first pass of the application liquid should be large, and the second pass of the drug can be generally sprayed. Http://
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