How is the tomato cavity fruit produced? How to prevent it? Tomato hollow fruit refers to the fruit with a hollow between the peel and the pulp, which is more common in greenhouse and greenhouse cultivation in winter. Tomato hollow fruit is lighter in weight and has a lighter taste, which affects the yield and quality of the fruit.
First, the cause of the void fruit
(1) Low temperature and low light
In winter, there are many rainy and snowy days, insufficient light, low temperature in the shed, small temperature difference between day and night, reduced photosynthetic products, insufficient nutrient transport to the fruit, and easy formation of hollow fruit.
(2) Improper management of fertilizer and water
During the fruit expansion period, there are too many watering and topdressing, especially the application of excessive nitrogen fertilizer. The plant grows too prosperously and occurs prolonged, so that the nutrients can not be supplied to the flesh cells in time, and the growth rate is slow, resulting in the formation of hollow fruit. In addition, the watering amount during the fruit setting period is insufficient or the soil dry and wet changes are too large, the growth and development of the fruit is blocked, and the hollow fruit is also easily formed.
(3) Improper use of plant growth regulators to promote fruit setting
The use of elements such as anti-fallin is used during periods of excessive concentration or insufficient light, the fruit is swollen too fast, and the placental dysplasia results in a hollow fruit.
Second, prevention measures
(1) Improve the temperature and light conditions to control the lighting and temperature of the winter greenhouse, which is an important condition to ensure the good development of the fruit. According to the weather changes, timely ventilation, light transmission and cover insulation, reasonable temperature and light regulation, conditions can be taken to increase temperature and fill light and other measures to create suitable conditions for fruit growth and development. Generally, the temperature in the greenhouse is 20 to 27 ° C, the night temperature is 8 to 14 ° C, and the time of receiving light and scattered light during the day is not shorter than 6 hours.
(2) Strengthening fertilizer and water management During the whole growth period, keep the soil moist and avoid unevenness of dryness and wetness, especially during the fruit expansion period, it should prevent the soil from drying out. The base fertilizer is mainly organic fertilizer. Before the first ear fruit is expanded, the top dressing should be controlled, especially the application of nitrogen fertilizer should be controlled. After harvesting the first ear, timely topdressing, promoting micro-irrigation and water and fertilizer irrigation, to avoid furrow irrigation, ditch application.
(3) Proper use of the fruit hormone to master the time and concentration of the flower, when the flower is spent, the flower must have been extended to the trumpet-like flower, not too early. Usually, 25-40 mg/kg of tomato lingering flower, or sprayed with a concentration of 15-20 mg/kg of flavonoids, once every 2 days. It usually ends before 11:00 am.
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