As a vegetable, fennel has an important edible stage. Fennel germinated from spring to a month and a half ago, and the leaves were tender and fragrant, which was the best time to eat. Once flowering, the stems are rapidly aging, and the dietary fiber is obviously increased. When vegetables are eaten, they lose their fresh and tender taste. Therefore, many farmers who grow fennel at home in northern China will seize the prime time of spring and cook with fennel.
The optimum temperature for the growth of 1 fennel is about 15~20 degrees, and it can be planted and grown from March to September every year. Fennel can be planted by seed propagation. In order to sell it early in the north, many pot friends planted it in greenhouses and achieved very good economic benefits. Planting fennel can be carried out in the form of seedling transplanting and direct seeding, and original fennel seeds or seeds harvested last autumn can be selected to improve the germination rate.
2. Fennel seed germination treatment for 30min In order to sow the whole seedling at one time without delaying planting, fennel seeds were treated with variable temperature before planting and sowing, and warm water of 55 degrees was selected. Immediately pour fennel seeds with round seeds, bright surface and no signs of mildew into warm water for soaking, while stirring. It took about half an hour to take fennel seeds out and put them in 0. 1% of the existing equipment.
Put it on a damp and cold rag, or wrap it with gauze, keep it moist, and put it in the natural environment within 2 1~22 degrees to accelerate germination. During germination, you can wash the seeds once a day and send them to the bacon with 80% of the seeds milky white, so you can start sowing. Fennel seeds should be prepared in advance for each mu of land, and about 5 kg is enough. In case of direct seeding, fennel seeds can be sown after seed dressing with coating agent.
3 Soil selection and fertilization Foeniculum vulgare likes fields with loose and fertile soil, rich and colorful organic matter content, excellent irrigation and high terrain, and does not like planting in low-lying areas. Due to summer precipitation, fennel often suffers from diseases. Generally, the more fully fermented organic fertilizer is used as the base fertilizer, the better, but it is good to maintain it at 2000~3000 kg per mu. Diammonium phosphate per mu 10 kg, 45% light fertilizer 30~50 kg. Deeply loosen the land resources, level them with a micro-tiller and wait for sowing. In the process of planting fennel, you will find that fertile sandy soil grows better than muddy soil.
Sowing fennel can be done by hole sowing or drill sowing, which is usually done in a field with a relatively large planting area. Generally, seedlings will emerge in a week, the row spacing is generally kept at about 40 cm, and the height of seedlings is about 5 ~ 6 cm. Replenish the seedlings, remove the weakness and keep the strength, and keep the length of two adjacent trees at about 4 cm, which is beneficial to the growth of seedlings. Excessive congestion is prone to weak seedlings, which grow to 7 ~.
The height of top dressing and disease prevention seedlings is about 10 cm, and about 3 kg of urea and 2 kg of potassium dihydrogen phosphate 1-2 kg can be applied per mu. In order to prevent underground pests, there are more underground pests in the land, and about 2 ~ 3 kilograms of thiamethoxam tablets are applied to each mu of subgrade. You can also add clothianidin insecticide and rush in at the same time under the condition of fertilization after seedling.
Disease prevention is also an indispensable management measure of fennel. Fennel has strong adaptability, but it is also prone to root rot. Metalaxyl manganese and zinc, or ethyl phosphorus, aluminum, manganese and zinc can be applied downstream, and some fungicides such as Bacillus subtilis can also be applied downstream. Fennel can be harvested many times and needs more soil nutrients during its growth. Harvest twice each time, and topdressing 20 kilograms of high-nitrogen compound fertilizer per mu.