Eggplant coloring is an important indicator of the value of eggplant products. The black-purple eggplant variety has poor coloration in the unfavorable environment, becoming light purple to reddish purple, and individual even closer to green. In the protected area, half color paler colored defects occur. Ratched Tie Down,Ratchet Strap Tie Downs Kit,Heavy Duty Strap Kit,Cargo Ratchet Strap Tie Downs Kit Ningbo Zhihao Car Accessories Co.,Ltd. , https://www.zhihaoautoparts.com
1, species reasons. Due to the physiological characteristics of the varieties, the resistance to the outside world is relatively weak, and there are often difficulties in color conversion.
2 temperature. Fruit coloration is actually a change in the type of pigment contained in the cells, thereby exhibiting a change in color. Temperature plays an important role in fruit growth and maturation. If the daytime exceeds 30°C for a long time and the average nighttime temperature is lower than 12°C, fruit turning will be difficult or uneven, often appearing on the fruit shoulder.
3, light. After the purple eggplant is in fruit, it will suffer from insufficient rain in the rainy day. The weak light affects the photosynthesis, delays the fruit ripening time and the transformation of the pigment; under low light conditions, the high temperature drought or malnutrition will aggravate the occurrence of poorly colored fruit; the base cells are new The cells are easy to color, but due to the short exposure time, the color near the goo is lighter.
4, nutrient supply. If partial nitrogen fertilizer is applied, the soil will have poor air permeability and the fruit will be difficult to turn.
5, plant leggy. Closed space, fruit covered by foliage, hidden under the plant, can only get scattered light, the entire or half of the fruit color is not good, the fruit color is light, the fruit inside the canopy of the plant, due to blade shading and the formation of half color bad fruit .
Precaution
1. Appropriately sparsely cultivated eggplants in greenhouses must not be planted in open rows, but must be sparsely planted.
2, Strict pruning can generally take double dry pruning method. In the early plant hours, 2 dry lines can be used, and 3 lines can be interlaced. When 3 dry lines affect the light transmission between lines, it can be restored to 2 dry pruning. , pruning method, the degree of picking leaves, in order to allow full fruit lighting prevail.
3. The cover uses a film with a high UV transmittance. The eggplants grown under glass cover are colored well. Since the protected area is closed in winter and there are too many water droplets on the plastic film, it should be treated with anti-dew agent. After covering an ordinary film for more than 3 months, the contamination is severe, and it is best to frequently clean or switch to a pellicle film with a high UV transmittance. Clean the film regularly to keep the light transmittance as high as possible.
4, the use of formula fertilization technology, rational application of organic fertilizer, sparse topping to prevent premature aging.