Planting techniques of open field cabbage in spring

Different kinds of cabbage are planted at different times and methods, and there are also certain techniques for planting open-field kale in spring. Let's take a look at it.

Planting techniques of open field cabbage in spring

1. In order to plant cabbage in spring, we need to choose cold-resistant and disease-resistant early-maturing varieties for seedling preparation. The sowing and planting time is from late December to the first and middle of January, and most seedlings are raised in solar greenhouse or improved sunny border. The planting density per mu is about 4000 plants. The nursery land we choose should be fertile and watered with enough water. Spread the seeds evenly into the soil and cover them with fine soil.

2. It usually begins to be planted when it is warm in February or March. At this time, the temperature should reach more than 5 ℃. Before planting, the trenches between rows and 50cm should be dug in the shed to bury the seedlings. The seedlings with leaves were planted in the ditch in order and watered.

3. After planting, the temperature management in the greenhouse should be strengthened and the measures of preventing cold and keeping warm should be paid attention to. In the colder time, the seeds can be covered all around, and the greenhouse temperature can be increased by not letting out during the slow seedling period, with an average temperature of 26 ℃ in the day and 11-15 ℃ at night, and squatting seedlings for about 7-10 days, 15-20 ℃ in the daytime and 12-14 ℃ in the night. In the early stage of growth, the ventilation began when the temperature in the greenhouse was more than 20 ℃, and when the minimum temperature in the greenhouse was more than 10 ℃ at night, the small arch shed was removed.

4. After planting, pay attention to the water supply of the plant and water it in time. At the same time, the semilunar furrow was planted for topdressing, mainly applying ammonium nitrate, about 10kg per mu. At this time, pay attention to observe the growth during the growth period, at the beginning of clumping, apply diammonium phosphate, about 15kg per mu.

5. Do a good job in pest control and weeding management.

After mastering the technology of planting open-field cabbage in spring and doing a good job of maintenance carefully, you can harvest kale clumps.