1. Shed temperature is too low. The temperature is too low, especially if the temperature is too low in the middle of the night, which leads to the obstruction of the transformation of lycopene in eggplant and the difficulty of coloring the eggplant. Solanaceous vegetables had the best lycopene formation at 24°C. Therefore, to adjust the temperature in time, the results during the day temperature control at 25 °C ~ 30 °C, night temperature with 16 °C ~ 20 °C is appropriate.

2. Insufficient light. A few days ago, persistent fog weather caused insufficient lighting in the shed. The eggplant is a hi-light crop, the lack of light grows weakly, the yield is reduced, the pigment is not easy to form, the fruit color is light and easy to produce variegated colors, especially the purple eggplant is not easy to color, directly affecting the price of the plant. In addition, under low light conditions, if malnutrition occurs again, it will increase the occurrence of poorly colored fruit. Weak light, even rainy weather, worsening the degree of fruit coloring. Solution: Under the premise of adjusting the temperature in the greenhouse, remove the aging leaves from the lower part of the plant and combine the measures such as wiping the greenhouse film to improve the light conditions.

3. Excessive use of nitrogen fertilizer, excessive growth of nutrients, resulting in the fruit is not easy to color. Excessive use of nitrogen fertilizers, especially if excessive nitrogen fertilizers are applied during the later growth period, will lead to serious growth of the plants, so that the leaves will be squeezed and obscured to affect the ripening of the fruits, resulting in poor coloration. Solution: In the later period, the use of nitrogen fertilizer should be minimized. If the plants are not growing well, some foliar fertilizers can be sprayed to solve the problem. When the coloring is not good, organic fertilizer can be used in combination with potassium sulfate, which can significantly improve the fruit coloring index.

Sardine Canned In Tomato Sauce

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