The cultivation of the onion has a long history. In the ancient Persian 5,000 years ago, the Kalidian dynasty used it as a charm. The onion, garlic and red pepper are also called "Northeast Three Spicy", which is very popular among the Northeast. It can be fried, raw, and seasoned. The strained river scallions are named after they grow in the fertile soil of the Seligen River in Baoqing County, Heilongjiang Province, where the water source is sufficient and the land permeability is good. Its texture is tender, spicy and strong, with the functions of calming the liver, moistening the lungs, strengthening the stomach, softening the blood vessels, promoting appetite, etc., which are favored by people.

Technical requirements for quality of strained river scallions (1) source. 1. Variety selection: Choose high-quality, high-yield, disease-resistant, stress-resistant, adaptable, and good-quality varieties. 2. Seeding requirements: The cross-section diameter of 1.5 cm to 2.0 cm should be selected for healthy and vigorous, no disease and mechanical injury of onion for planting, and 3.0 cm onion is recommended for planting. 3. Planting treatment: 50% carbendazim 200 times solution evenly sprayed bulbs, dried and planted. (2) Production technical requirements. 1. Soil conditions: (1) Election: Avoid heavy sputum, and carry out rotation for more than 3 years. (2) Requirements for cultivated land: Neutral soil with flat terrain, loose soil, convenient irrigation, rich in organic matter, water retention and strong fertilizer retention. Avoid salt and alkali, heavy clay and low-lying land. There are no herbicide residues such as sulfonsulfuron, pusti, and atrazine. (3) Land preparation requirements: the plough layer is 20 cm deep, the flattening is fine, and the NPK fertilizer with 1 ton of high-quality decomposed farmyard manure or 1:1:1.5 (total nutrient content of 45% to 50%) is applied. 20 to 30 kg is used as the base fertilizer and applied to the 10 cm soil layer. 2. Cultivation methods: Planting according to local planting habits. The ridge planting is adopted, the ridge spacing is 65 cm, and two rows are planted on the ridge, and the row spacing is 8 × 15 cm. For the cropping, the line spacing of 120 × 90 cm is 8 × 15 cm or 10 × 15 cm. The depth is not limited to the end of the phosphorus stem, and the seedlings are protected from 4.2 to 45,000 per acre. Planting period: combined with the local climatic conditions and characteristics of the variety, it should be planted when the soil is frozen to a depth of 5cm to 7cm. 3. Fertilization: The root system of the scallions is shallow and has a weak absorption capacity. It must be fertilized in batches during the growth period. The amount of base fertilizer should account for more than 60% of the total fertilizer. Generally, the medium-fertility plots are applied with 15 kg of diammonium per 667 square meters. Fertilization is generally carried out twice in the seedling stage and the growth period of the scales. In the seedling stage, in order to ensure the growth of some functional leaves on the ground, 10 kg of ammonium sulfate is applied per 667 square meters. In the bulb growth period, 15 kg of NPK compound fertilizer (total nutrient content of 45 to 50%) should be applied per 667 square meters. Potassium dihydrogen phosphate or foliar trace element fertilizer can also be sprayed as needed. Fertilization ended 10 days before harvest. 4. Field management: cultivating and weeding: the first weeding is carried out when the onion is 5 cm to 8 cm; the second weeding is carried out at 20 cm to 25 cm. The cultivating combined with weeding is carried out twice generally. Watering and draining: The roots of the genus are all roots, the roots are shallow and not developed, the ability to absorb water and absorb water is weak, the soil moisture is strict, and the wetness is afraid of drought. Water should be timely combined with lyrics. If the onion is heavy before the emergence of the shallot, the water should be watered according to the sensation and the amount of water should not be too large. After entering the leafy period, the irrigation should be appropriately increased to keep the soil moist. Stop watering 7 to 8 days before harvest. 5. Pest Control: Agricultural Control: Select excellent varieties of resistance (resistance); rational layout, implement crop rotation; cultivate bulbs without pests and diseases for planting. Principles of Pharmacy Use: It is forbidden to use high-toxic, highly toxic, high-residue pesticides and their mixed pesticides that are prohibited by the state. When using chemical control, it should be carried out in accordance with the provisions of GB4285 and GB8321 (all parts). Should be based on prevention, early treatment. 6. Harvest: Scallion: grow until the onion leaves are 80% withered and the outer scales of the bulbs should be obtained in time. At the time of harvest, cut off the tube-shaped cluster of green onion leaves with the scissors, and leave the onion with a stem of about 2.0 cm to facilitate the running of the onion. Drying: After cutting the leaves, it should be placed in the scaffolding to dry in time, and the thickness is 40 cm. Keep the shade and air in the scaffolding; prohibit exposure to the sun and rain to prevent mold and decay. Finishing: After drying to 2 to 3 layers of leathery skin, it can be screened and graded. Storage: Store in a cool, dry place. The dormancy period is usually 3 months. The storage temperature for wintering after the dormant period should be 0 to -10 °C, and the minimum temperature should not be lower than -20 °C. Thawing should be naturally slowed down as the temperature rises in the season, avoiding sudden heating and causing decay. (3) Processing. Starting onion→drying→finishing→grading→inspection→metering→packaging→warehousing→storage. (4) Quality characteristics. 1. Sensory characteristics: The same variety or similar varieties, the size is basically the same, well preserved and no obvious defects (including mechanical injury, decay, germination and freezing damage, etc.). 2. Grade index: Quality requirements: It has the characteristics of uniform variety, the bulb shape is good or good, the color is normal, the surface is smooth, the height is high or certain, the decoration is good, no mechanical injury, no pests, no scales, dry No soft rot and dirt, single diameter 1.5cm to 3.5cm. Limit: The failure rate of each batch of samples does not exceed 5% to 10%. Those who are first-class germinations and soft rots are not allowed to be detected.

Apply to：
Producers within the scope of protection of the scorpion locust product can submit an application to the Quality and Technical Supervision Bureau of Baoqing County, Heilongjiang Province for the use of the “Special Mark for Geographical Indication Products”, which is approved by the General Administration of Quality Supervision, Inspection and Quarantine.