The high Huai Village of Luocheng Street in Shouguang County, Shandong Province, is mainly planted with sweet peppers. When reporters interviewed the vegetable farmers in the village about how to improve the coloring of sweet peppers, many vegetable farmers believe that the higher the temperature in the greenhouse, the better the coloring of sweet peppers.
The reporter thinks this understanding is one-sided. Raising the shelf temperature can indeed speed up the color of sweet peppers, but not the higher the temperature, the better the coloring. The suitable temperature for the coloring period of sweet pepper is about 25°C, because at this temperature, the lycopene that determines the color of sweet pepper is most easily formed. However, if the temperature is too high, for example, above 35°C, the color of the bell pepper turns abnormally.
The coloring of sweet peppers is not only related to temperature, but also related to factors such as fertilization and light. If you want to improve the coloring of sweet peppers, pay attention to the following three aspects.
The first is to top-up fertilizer, supplement potassium fertilizer and boron fertilizer, and do not use excessive nitrogen fertilizer. The amount of potash fertilizer is usually about 1.5 times the amount of nitrogen fertilizer.
The second is to improve the lighting conditions to avoid insufficient light. Adequate light is one of the important measures to promote the coloring of sweet peppers. The coloring period of sweet peppers must pay attention to cleaning the shed film and increase the transparency of the shed film. The old leaves and yellow leaves in the lower part of the plant should be removed in time to ensure that the plants have good light transmission and promote uniform coloring of sweet peppers.
The third is to increase the temperature difference between day and night and increase the accumulation of photosynthetic products. But also to avoid too high temperature is too low, such as more than 30 °C and less than 13-15 °C.
In addition, some vegetable farmers promote the fruit color as soon as possible, spray erythropoietin, but the concentration is lower. Otherwise, high concentrations of ethephon will cause plant aging. Should be sprayed with 40% ethephon not more than 3000 times. Do not exceed 300 times the fruit concentration.
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