In greenhouse production, if the winter tomato grows slowly during the fruiting period, it will seriously affect the income and fruit quality of the farmers, causing huge losses to the farmers. Nowadays, many farmers have reacted. The tomato fruits they planted in the winter greenhouse have not been long. Even if the fruit grows, the fruit is small and the fruit is slow. So what are the reasons?
1. In winter, due to the low outdoor temperature in the greenhouse, the temperature, humidity, and light in the shed cannot meet the growth needs of the tomato, and the symptoms of small fruit and slow fruit will appear.
It is recommended that growers create suitable temperature, humidity, light and other conditions for vegetable growth in winter to ensure the normal growth and development of their tomatoes. The temperature is controlled at 25-30 °C during the day and 15-18 °C during the night. Keeping the temperature difference between day and night at 15-17 °C is conducive to fruit enlargement. Humidity, the soil is kept dry and the humidity is not too large, otherwise it may cause disease.
2. The greenhouse is poorly insulated, and the greenhouse with low transmittance of the shed film is prone to occur.
Tomatoes have small fruits and slow-growing greenhouses. Many of them are caused by many drawbacks in the construction of greenhouses. For example, the angle of the rear roof is too small, the degree of arching of the shed is small, and the grass is covered with thin grass. Such facilities have poor thermal insulation properties, affecting the transmittance of the shed film, and cannot meet the appropriate temperature requirements and lighting conditions for tomato growth.
It is recommended that such greenhouse growers should do a good job in greenhouse insulation, clean the dust of the greenhouse film and increase the light transmittance. When the temperature is low, the temperature of the greenhouse can be artificially increased, such as using warming equipment or warming blocks.
3, the soil fertility is poor, the organic matter content is insufficient, the greenhouse with poor water retention and fertilizer retention is prone to occur.
The soil layers in many greenhouses are sandy soils. The sand reserves have poor water retention and fertilizer retention capacity, which is prone to poor nutrient supply. In addition, some growers use only ternary compound fertilizer when they are composting. The utilization rate of such fertilizers is not High, nutrient content is not complete, tomatoes naturally difficult to grow normally, which causes their tomato fruit to expand slowly and grow small.
It is recommended that the planter's base fertilizer must be adequately applied. In addition to the use of NPK fertilizers, it is necessary to supplement various trace elements.
4. In management, due to heavy leaf picking, stems and vines are injured, and tomatoes with bent handles are prone to occur.
As we all know, tomatoes mainly produce photosynthesis through leaves to produce organic products, which are then transported to the fruit to promote tomato fruit enlargement. When the growers pick the leaves too early and too heavy, the photosynthesis of the tomato plants is reduced, which will affect the normal growth of the tomatoes. This is the reason why the fruits are small and no fruit is found.
Some growers have not changed color in the first ear of the tomato, and the leaves have already reached the third ear. There is also the hanging vine rope "struck" the lower stem of the tomato plant, which hinders the growth of the plant to some extent. In addition, some growers did not pay attention to protecting the stem of the tomato, which caused the fruit handle to bend, hindering the transportation of nutrients, and the fruit swelling speed naturally slowed down.
The above is the reason why the tomato fruit is small, the fruit is slow and the management measures. The tomato growers must be scientifically managed. It is necessary to pick the leaves properly. It should not be too early too heavy. When hanging the vines, the ropes should not be too tight. Pay attention to the protection of the fruit stalks.
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