"Look! Many of the tomatoes in the shed that had just been sitting on the shed were cracked. How is this going to happen?" On March 29, in the shed area of ​​Luocheng Street in Shouguang City, the vegetable farmer Zhang pointed to the problem tomato. Ask the reporter.
The reporter learned from multiple greenhouses that it is very common for the first panicles of tomatoes in winter and spring. The vegetable farmers do not know what is going on, and some are helpless. The reporter analyzed that there are several reasons for the top of the tomato crack.
First of all, the temperature is too low, especially when the flower buds at seedling stage are too cold at night. Do not look at the current temperature in the shed, but the flower bud differentiation period of the first 1-3 fruit of the tomato is generally in the 2-7 true leaf stage, which is a period of deep winter cold, especially when the night temperature is too low, resulting in flower bud differentiation. Bad, deformed flowers. In particular, the nighttime temperature is less than 12°C. In addition, if the temperature during the flowering period, if the temperature is still very low, the chance of tomato top cracking increases.
Second, the floods and droughts are uneven. Especially in the early period of tomato water control is serious, and fruit and fertilizer water after the onset of severe attacks. After the weather became warmer, many vegetable farmers adopted excessive water management methods to avoid plant growth. After the fruits were sat, the management methods of large-scale and large-scale fertilizers were adopted to promote fruit development. Especially in the case of excessive nitrogen fertilizer, the pulp develops too quickly and can easily cause fruit cracking in tomatoes.
Again, the lack of factors. In flower bud development, flowering and young fruit expansion process, insufficient supply of calcium and boron or partial application of nitrogen and potassium fertilizers will lead to physiological boron deficiency and calcium deficiency, resulting in poor flower development, poor fruit cell combination, and even worse the top crack of the fruit. From the beginning of the seedling stage to the first fruit enlargement, the leaves are sprayed with calcium fertilizer and borax or Sonic boron every 15 days or so.
In addition, due to the excessive concentration of anthers. If the concentration of anthers is too large, the force that promotes the development of the fruit is large. In the case that the photosynthetic products in the tomato do not cooperate well, the top crack phenomenon will occur and the value of the commodity will be lost.
To sum up the above reasons, when the flower buds are differentiated, the nighttime temperature is too low to be the main cause of the top cracks in tomatoes, while the unevenness of droughts and floods, lack of elements, and the concentration of anthers at the conference increase the top cracks. Therefore, in the flower bud differentiation period of tomatoes, maintaining a good temperature in the shed is a top priority. The reporter suggested: To remove the cracked fruit on the plant in time, remedy the problem according to the reasons given above.
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