Prevent purple red eggplant from turning red

Recently, many purple long eggplants in the greenhouse have faded in color, affecting selling prices. The author's analysis believes that the change of purple long eggplant to red color is mainly caused by rising temperatures, strong lighting, and improper fertilization. To avoid the purple long eggplant turning red, you should do the following 3 points. Controlling the greenhouse temperature not only affects the flower bud differentiation, but also affects the production and transportation of lycopene. Especially when the current temperature gradually rises, the temperature of the greenhouse is higher, so it is necessary to provide timely ventilation. During the day, the shelf temperature is controlled at about 28°C and controlled at about 15°C at night so that it will not affect the formation of pigments, which is beneficial to the accumulation of nutrients. The appropriate number of leaves removed as much as possible to remove the excess leaves of the internal hemorrhoids, but can not pick too many leaves at one time, picking the leaves will cause direct sunlight fruit discoloration. For the eggplant plants with a high-result position and direct light irradiation, a retracted pruning method can be adopted to reduce the length of the long eggplant and avoid direct sunlight. Appropriate application of potassium fertilizer results do not pay attention to potassium supplement later, the probability of red eggplant will increase. In the stage where red eggplant is easy to appear, the application frequency of potash fertilizer can be appropriately increased, and high potassium fertilizer can be applied once in the blinking period and during the rapid fruit expansion period, which can prevent the purple long eggplant from turning red.

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