After the tomato was planted, some vegetable farmers suspected that the seedlings were weak and increased the supply of fertilizer and water during the seedling stage, which caused the tomato to grow severely. The first to second ear fruits were obviously small and the deformed fruit was more. In fact, tomato seedlings should be watered or not watered as much as possible, and no fertilization. When the first spike of the tomato has a walnut size, the appropriate amount of ternary high-potassium compound fertilizer is applied to promote fruit enlargement. After each application of high potassium fertilizer twice, a nitrogen, phosphorus and potassium balance fertilizer was applied to avoid high nitrogen and potassium in the soil and affect plant growth.
The stalks of the early seedlings are thin and not hollow, the leaves are small and thick, and the leaves are dark green. Such tomato seedlings can obtain high yield in the later stage; on the contrary, the seedling stage has sufficient fertilizer and water, the seedling stalks are thick and hollow, the leaves are large and tender, and the leaves are brighter. Light, such a tomato seedling is a long seedling, but not strong, often the first to third ear of the plant fruit set rate is low, the fruit is small, the pre-production is generally low.
The main reason for the growth of tomato seedlings is that the vegetative growth in the seedling stage is too strong, affecting reproductive growth, resulting in an imbalance between vegetative growth and reproductive growth. The management of tomato seedlings should grasp the word “control†to increase production, especially to increase the output in the early stage.
In addition to water control and fertilizer control, you should also pay attention to temperature control. It is found that the plants have signs of prolongedness, and the temperature in the shed should be adjusted in time to avoid excessive temperature. At the same time, the temperature difference between day and night should be increased, and the temperature difference should be 10 °C; or the plant growth regulator such as Mepera should be controlled, and the concentration of the liquid should not be too large.
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Ventilation is one of the most important components in a successful greenhouse.
If there is no proper ventilation, greenhouses and their growing plants can become prone to problems. The main purposes of ventilation are to regulate the temperature and humidity to the optimal level, and to ensure movement of air and thus prevent build-up of plant pathogens (such as Botrytis cinerea) that prefer still air conditions. Ventilation also ensures a supply of fresh air for photosynthesis and plant respiration, and may enable important pollinators to access the greenhouse crop.
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