How does eggplant turn white when planted in the open field?

10 cm soil layer temperature is stable above 12℃ before planting. The planting period in Shandong is generally from late April to early May. Like my hometown in Jiangxi, some eggplants planted in early April this year died. In other words, when planting eggplant in spring, we must correctly grasp the planting time.

Generally speaking, eggplant is planted later than tomatoes and peppers. Early planting is not conducive to the slow growth of seedlings and is vulnerable to freezing or chilling injury.

In order to obtain high and stable yield, we should pay attention to adopting suitable planting methods. Early-maturing varieties are generally cultivated in flat beds with 3300~3500 plants per mu, which is beneficial to improve early yield. In order to improve the ventilation and light transmission conditions of eggplant in the middle and late stage, reduce the occurrence of diseases and facilitate field management, intercropping should be adopted when cultivating middle and late maturity varieties. The main combinations are as follows.

(1): Eggplant interplanted with carrot baskets in early spring, and spinach interplanted with garlic in autumn and winter. After soil preparation and fertilization, it is made into 80~ 100 cm small border. Early-maturing Chinese cabbage is planted in the border in the middle and early March, and eggplant is planted in the empty border in the middle and late April, with 2 rows per border and 50 cm spacing between plants. After the cabbage was harvested in the middle and late May, eggplant was fertilized and cultivated to form a layout of large and small rows.

(2) Intercropping early-maturing spring cabbage or lettuce to raise seedlings of Chinese cabbage (rape) ~ harvesting cabbage, planting eggplant ~ harvesting cabbage, sowing summer cabbage in the border ~ planting autumn spinach or wintering spinach after the eggplant is pulled out. In winter fallow land, after fertilization and soil preparation, large and small beds are made, with a width of 1.5m and small beds with a width of 80cm, which are arranged at intervals. In mid-March, the small border planted Chinese cabbage, and the big border planted early-maturing Chinese cabbage or lettuce. After harvesting Chinese cabbage in the middle and late April, fertilize and prepare the soil, and plant two rows of eggplant in the small border in late April or early May with a spacing of about 40 cm. After harvesting cabbage or lettuce in the middle and late May, the eggplant was fertilized and cultivated, and the original large bed became a small bed, and the eggplant field became a large and small layout.

Second, the field management measures after eggplant planting. After planting eggplant, water the seedlings once, and apply water to people's feces. When eggplant blooms, it is necessary to properly control water and squat seedlings to promote the deep development of roots. After the fruit of Meneggplant swells, stop crouching and start watering and topdressing. Apply 500~ 1000 kg of human manure and 0/5 kg of diammonium phosphate per mu.

After eggplant and four-female tomato bear fruit one after another, the demand for fertilizer and water reaches the peak. When the eggplant grows to the size of an egg, apply manure or chemical fertilizer, with 4000-6000 kg of human manure or 0/5-20 kg of urea/kloc per mu, and then water it. When the fruit of the four-female barrel eggplant expands, manure or nitrogen fertilizer is applied again. Results the root absorption decreased in the later stage, and 0.2% urea and 0.2%~0.3% potassium dihydrogen phosphate could be sprayed on the leaves. The suitable spraying time is sunny and evening.

When eggplant is planted, the temperature is low and the new roots grow slowly. After watering the slow seedling water, seedlings should be raised to keep the soil loose and dry, and the second intertillage should be carried out after 10. As the saying goes, "Eggplant depends on shovel, cucumber depends on prick", which shows the importance of intertillage to eggplant growth. When the eggplant "stares" and the eggplant blooms, end the intertillage and squat seedlings, and water and topdressing. After the eggplant is harvested, it is cultivated into small ridges or ridges.

Third, eggplant stubble regeneration cultivation technology eggplant stubble regeneration cultivation is a cultivation method of cutting off the upper part of eggplant cultivated in summer to promote the continuous growth of new branches from the lower part. Regeneration culture can save the time of seedling raising, make plants enter the fruiting period quickly and prolong the harvest period of product organs. The specific method is as follows →

Before the autumnal equinox, cut off the old seedlings 20~25 cm away from the eggplant roots, water them in time, and topdressing urea 10~ 15 kg per mu. A few days later, new branches grew at the base of eggplant, 1~2 robust new branches were selected, and the remaining new branches were removed. 20~25 days after cutting, new plants will bloom, and eggplant can be harvested and marketed 20~25 days after flowering.

The temperature is gradually decreasing in autumn, so it is necessary to strengthen the management of fertilizer and water in eggplant cutting to attack seedlings and protect fruits. When the average outdoor temperature drops to 20℃, the shed should not be fastened too tightly at the beginning. When the outside temperature drops to 15℃, seal the shed tightly at night, and pay attention to ventilation when the temperature is high during the day to avoid excessive temperature and humidity. When the greenhouse temperature is lower than 15℃, ventilation is not needed, and attention should be paid to heat preservation and cold protection to promote fruit ripening. Water the tent as little as possible in the later period of fastening to prevent the ground temperature from dropping.

If the eggplant cultivated by stubble regeneration is well ventilated and transparent, its root system is developed, its plants grow vigorously, its fruit is early and its fruit nodes are low, which is beneficial to nutrient transfer, making the fruit grow huge, well colored and its yield is considerable, which is 2000~3000 kg higher than that of eggplant without stubble per mu.