Onions, also known as Dutch onions, scallions, etc., are one of the most common vegetables on the table, and are available all year round. Onions are native to Central Asia or West Asia and later introduced to China, mainly in Xinjiang, Shandong, Inner Mongolia and Fujian.
Onions have the effect of lowering blood pressure, preventing colds, refreshing and refreshing the brain. Eating onions is good for the body. Now I will share the onion seedlings and planting techniques as follows, I hope to help you:
First, fertilize
A seedbed should be selected for the warmth of the sun, the soil is loose and fertile, and the land can be filled. The width of the face is 1.2-1.5 meters, and the length varies from place to place. Apply 5-6 kg per square meter of decomposed farmyard manure and apply 60-80 g of compound fertilizer. Mix the soil and fertilizer in the sputum and remove the cover soil. 150-200 grams of seeds are required for the area of ​​1-1.5 points per mu of seedbed.
Second, the seeding method
1, broadcast
Pour the bottom water before sowing the onion seeds. After the underwater infiltration, spread the dry seeds (to ensure uniform sowing, the seeds and fine soil can be mixed first). After the seeds are sown, cover the fine soil 1-1.5 cm.
2, broadcast
Do not mistake the dry broadcast at a line spacing of 6-8 cm, and draw a shallow groove of 1.5 cm depth. After the seeds are spread in the ditch, they are leveled and watered.
Third, seedbed management
Cover the seedlings before emergence, and remove the cover in time after emergence. After the seedlings are out, the last fine soil or water is poured. When two true leaves are combined with weeding, the seedlings are 4-5 cm. If the lack of fertilizer in the seedbed can be combined with watering, 5 kg of urea is applied per mu. Water should be poured before seedlings and then seedlings.
Fourth, strong seedling standards
When planting, it is best to choose seedlings with well-developed roots, strong growth, and uniform size. The seedling age before transplanting is 55-60 days, the seedling diameter is 6-8 mm, the seedling height is 25 cm, and the single seedling weight is about 4-8 grams. Eliminate the seedlings, dwarf seedlings, diseased seedlings, branching seedlings, and grow too large and small seedlings.
V. Transplanting and planting
1. Soil preparation and fertilization
Onion Xi Dafei therefore applies 5,000 kg of farmyard manure, 30 kg of diammonium phosphate, 15 kg of potassium sulphate, and 1 kg of zinc fertilizer. The fertilizer is sprinkled and then ploughed. After the soil is ploughed, it is made 2 meters wide and 10 meters wide. Long embarrassment.
2, watering film
Water is irrigated for 5-7 days before transplanting. After the soil moisture is fully infiltrated, the herbicide is sprayed on the surface of the crucible and then the membrane is heated and protected.
3, punching and transplanting
Before the planting, the membrane should be perforated, and the row spacing between the holes is 15 cm. You can also make a punching device to improve the efficiency of planting.
6. Field management
1, watering principle
After about 20 days after onion planting, the onion enters the slow seedling period. Too much watering will lower the ground temperature and slow down the young plants. However, the new roots of the newly planted seedlings have not yet germinated and cannot be dehydrated. Therefore, the number of times the onions are watered at this stage, but the amount of watering each time is small. The general principle is that the seedlings are not wilted and the ground is not dried.
After the onion seedlings survive, they will enter the wintering period. To ensure that the onions are safely overwintered, it is necessary to timely water the winter water.
After the winter, return to the green, enter the stem and leaf growth period, this stage of the requirements of water, not only to promote growth, but also to prevent the length. Generally, the seedlings are about 15 days old. When the outer leaves of the onion seedlings are dark green, the waxiness increases, the leaf flesh becomes thicker, and the color of the heart leaves becomes darker, that is, the seedlings begin to water.
In the future, water is usually poured every 8-9 days to make the soil dry and wet, so as to promote the growth of the plant and prevent it from growing. Stop watering 7-8 days before harvesting.
2, fertilization
After the onion is planted, it is generally not topdressed before the slow seedlings. After wintering, the winter water is combined with the water, and 1000-1300 kg of manure per acre is applied. When the spring returns to green, it is combined with pouring back the green water and applying a green fertilizer.
3, cultivating loose soil
Loose soil is beneficial to the development of onion roots and the expansion of bulbs. Generally, the seedling stage should be carried out 3-4 times and combined with each watering; the stem and leaf growth period should be carried out 2-3 times until the plants are closed and the cultivating should be stopped. The depth of cultivating should be about 3 cm, and the planting plant should be shallow and deep away from the plant.
4, in addition to è–¹
For early twitching onions, cut off from the lower part of the flower bud before flower ball formation, or separate from the tip of the flower bud, tearing two pieces from top to bottom to prevent flowering from consuming nutrients, promoting side bud growth, and forming a more substantial bulb.
5, prevention and control of pests and diseases
Common diseases of onions include downy mildew, purple spot disease, atrophic disease, and soft rot. Common pests include fly, thrips, red spiders, crickets, and crickets. In the field management, we must carefully observe the occurrence of various pests and diseases, and find that the pests and diseases should be combined with physical, biological and chemical prevention methods in time to ensure the healthy growth of onion seedlings to achieve a bumper harvest.
6, harvesting
Onion harvesting is generally from the end of May to the beginning of June. When the onion leaves gradually turn yellow from bottom to top, the pseudo stems become soft and begin to fall; the bulbs stop expanding and the outer leather enters the dormant stage, indicating that the bulbs are mature, and should be harvested in time.
After the onion is harvested, it should be dried in the field for 2-3 days. Directly marketed, the roots can be removed and cut at the upper stem of the bulb to be sold in baskets.
If you need to store the onions, you should not go to the stems and leaves. When the leaves are dried to 70% dry, the stems and leaves can be braided, hanging in a ventilated, cool, dry place called hanging onions, or bag storage.
The onion tastes fresh and sweet, has a unique flavor, can be eaten raw, can also be cooked with other things, and is deeply loved by people. Therefore, onion has a certain market potential and has high planting value!
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