Once the Great Northern Wilderness, today's North Dazang, there is a vast plain, fertile black land, sweet underground springs, everything here nourishes the Merisian onion with the name "little ginseng". Merris onions are divided into purple onions and yellow onions. The onion bulb is round and spherical, with high firmness, spicy taste, slightly sweet, high crude fiber content, rich nutrition and storage resistance.

Merris onion quality technical requirements (a) variety. "Big Eight Flags." (2) Site conditions. The soil type is chernozem, sandy loam soil, meadow soil, pH value 6.8 to 7.5, and organic matter content ≥3%. (3) Cultivation management. 1. Selection of plots: Non-onion and garlic plots, which are rotated for more than 3 years. 2. Land preparation standards: (1) Deep pine preparation: The farmer's fertilizer is ≥30 tons/ha, the diammonium phosphate is ≤0.2 tons/ha, and the potassium sulfate is ≤0.15 kg/ha. (2) 畦: 畦 1 to 1.1 meters wide. 3. Seedling: Seedling time: From February 1st to March 5th, greenhouse seedlings, seedling age ≥ 60 days, plant height ≥ 15 cm, more than 3 leaves. 4. Colonization: Before May 15, the planting density is ≤ 450,000 plants/ha. 5. Water and fertilizer management: (1) According to soil moisture and plant growth process, timely irrigation, stop watering 20 days before harvest. (2) Based on organic fertilizer, perform topdressing 2 to 3 times according to the growth period of the growth period. 6. Harvesting: Harvested before September 10, and dried for 2 to 3 days after harvesting. 7. Storage: Store at room temperature for a period of not more than 8 months. (4) Quality characteristics. 1. Sensory indicators: the onion is round, the fruit shape is good, the color is copper yellow, the appearance is no damage and the insects and scars, 2 to 3 layers are not peeling. 2. Physical and chemical indicators: diameter ≥ 4.5 cm; spherical index 0.75 to 0.99; hardness ≥ 10.0 × 105 pa; specific gravity ≥ 1.00 g / ml. The water content per 100 g of onion is ≤91 g, the carbohydrate is 5 g to 8 g, the crude fiber is 0.5 g to 0.8 g, and the soluble solid matter is ≥8.0%.

Apply to：
Producers within the scope of protection of Meris' onion GI products may submit an application for the use of the \"Special Mark for Geographical Indication Products\" to the Meris Division of the Qiqihar City Quality and Technical Supervision Bureau of Heilongjiang Province, which is approved by the AQSIQ.