In early spring, tomatoes in protective greenhouses often cause empty fruit, and the causes and prevention methods are analyzed below.
1. The temperature of the greenhouse is high. During the fruiting period of protected tomatoes, the suitable temperature during the day is 20°C-25°C, and the suitable temperature at night is 13°-15°C. If the daytime temperature in the greenhouse reaches 35°C and the duration is long, poor pollination and fertilization will be caused and empty fruit will be formed.
2. Over-application of nitrogen fertilizer. Nitrogen is a necessary and abundant element in tomato growth process. However, if too much nitrogen fertilizer is applied during the period of tomato growth, stems and leaves of plants will grow too much and the accumulation of nutrients in fruits will affect the accumulation of nutrients.
3. Insufficient light. Tomatoes are hi-light warm crops, adequate light is conducive to its growth and development. If the light is insufficient during the growth of tomato, not only the product of the photosynthesis of the plant will be reduced, but also the plant needs to consume a large amount of nutrients to meet its own growth needs, thereby affecting the formation of colloidal substances, leading to hollow fruit.
4. Improper use of regulators. In order to prevent tomato drop and fruit drop and increase fruit set, hormone production is often used. If the flower is too early or the concentration of hormones used is too high, resulting in fruit development too quickly, it will also form a hollow fruit.
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