There are many reasons for tomato green skin, such as insufficient light, low temperature, and unreasonable fertilization, but the most important is the low nitrogen and high potassium caused by fertilization imbalance. It has been verified by experiments that the application of organic fertilizer can effectively improve tomato green skin. How to prevent tomato green skin?
Adding organic fertilizer, using formula fertilization technology, it is not appropriate to use ammonium fertilizer to adjust the ratio of nitrogen, phosphorus and potassium in the soil to promote the absorption and utilization of potassium by plants. This is the most important measure to prevent tomato green fruit.
Extend the time of seeing vegetables. When the fruit enters the color-changing period, it is necessary to remove the lower leaves and the nearby leaves of the color-changing ear, and increasing the light can reduce the occurrence of the fruit.
Roots and roots enhance plant resistance. Foliar fertilizer containing various elements (boron, calcium, magnesium, iron, zinc), which is suitable for amino acid type, promotes black and green leaves, enhances photosynthesis, increases the absorption of boron and calcium, and can reduce Green skin, cracked fruit, etc.
To strictly control the temperature, the daytime temperature should be controlled at 25 °C ~ 30 °C, the night temperature should be maintained at 14 °C ~ 16 °C, the temperature difference between day and night should not exceed 15 °C.
Balance the number of fruit set in the plant, not too much fruit or too low fruit setting.
The concentration of the flowering hormone in the control point should not be too high. The fertilizer should be added in time after the flowering of the anther.
For the greenhouse where green peel has occurred, high potassium foliar fertilizer and chitin can be sprayed to relieve symptoms.
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