(1) Choosing suitable varieties for planting
Three main varieties: six and onions, drums and shallots, and Yunnan shallots. In order to sell freshly cultivated, the drums are mainly selected from late March to July, and the Yunnan scallions are strong in the August-September typhoon and rain season. From September to January, the six and green onions are used. In order to keep the edible onion products for sale in October, it is advisable to use a large, fragrant drum-like variety to be planted in October.
(2) Selecting underground foot base fertilizer and whole
Choose easy to fill and fertilize the fertile ground, and rotate with non-onion garlic crops. Individuals need to re-enter 4000-7500 kg of red loam to improve the soil. The field before the sowing was ploughed and whitened. The base fertilizer is applied to the fully decomposed high-quality farmyard manure 4000-5000kg or the decomposed chicken and duck manure 700-10 calcium phosphate 50kg, potash fertilizer 10kg whole: according to the planting habits, the planting width is 1.2m wide and the height is 20-level.
(3) Treatment of onions
Selected onion strips with variety characteristics, full onion, no disease spots, no disability, no mold, no insects and no injuries, generally peeled to single heart or double heart (ie one or two top buds) Grade basis, seeded according to large, medium and small grades.
(4) Reasonable planting and seeding
According to the purpose of cultivation and variety characteristics, it is cultivated in flat sorghum. Generally, it is planted 7-distance per raft: March-July 6-8 cm. The high temperature period in August-September is appropriately relaxed to 8-10 cm. The bud tip is suitable. Every 667m2. The amount of seed: should be based on the water content of the onion, the sowing date is divided into early, middle and late, such as early drums (late March to April) 667m2 needs 325-350kg, medium term (May-July) About 200kg. Yunnan Shallots 1 and Shallots are about 100kg. In the later stage, the onion has a small water content, and the amount of seeds per 667 m2 is 30-4.
(5) Strengthening field management
1. Spray the herbicide in time after the sowing period: 50% acetochlor water distribution per 667m2, 1000 times wettable green mailong powder, water distribution 800-1000 times liquid spray, noodles, summer or June-August spray grass or mountain grass brush.
2, timely spraying water after spraying herbicide: the first irrigation after spraying, to fill the foot, wetting, planting onions and soil contact, fight for 10 days, Qi Miao, whole seedlings. If you do not see Qimao within 10 days
3, do a good job of water-resistant seedlings: after Qi Miao, about 12-15 days after sowing, grab the appropriate water-resistant seedlings, control the water to the bottom of the ditch. Promote the development of the underground root system, the upper part of the ground is short and strong, and has strong resistance to stress. Make the growth in the middle and late stages more powerful.
4, scientific topdressing: spring and summer shallots short-lived, topdressing generally one or two times, the first 20-25 days. Combined with irrigation, 17.5kg of 15:15:15 triple compound fertilizer was applied, and 15kg of triple compound fertilizer was applied for the second 12-15 days. The autumn and winter scallions grow long, the number of top dressings is the first and second, and the amount of fertilizer is applied in the spring and summer. Each 667m2 is applied with a carbon ammonium 75 irrigation ditch.
5, pest control: 1 gray mold, rot, soft rot and other diseases, with 65% 1000 times liquid or 65% zinc and Pu water 1000 times liquid or 65% daisen zinc water 800-1000 treatment.
2 Liriomyza sativae, onion flies, round purple spotted worm, onion thrips and worms, sweet insects, with 50% phoxim emulsion with water 1000 times solution or 2.5% cypermethrin emulsifiable concentrate with water mist control.
(6) Appropriate harvesting
In spring, it is generally harvested from 55 to 60 days, and in summer, it is generally 38-45 days, and in autumn and winter, it is generally 80-. After harvesting, the dead leaves are removed, the outer sheath is white, and there is no sand. The place where the bundle is 1-5k can be placed in the refrigerator for a short time and stored at 17 °C for 2-3 hours.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
Foshan Ja Suo Medical Device Co., LTD , https://www.jasuodental.com