Yuan Zang Welsh Onion is a new breed of products that I introduced from Japan. The variety is of high quality, spicy, light, stir-fry, soup or salad and is very popular among consumers. First, the characteristics of biological characteristics: (1) Morphological characteristics: stringy fibrous roots, developed root system, a wide range of distribution. Plant tall, adult plant height 60 ~ 85cm, leaves by leaf body and leaf sheath two parts, leaf body dark green, long 30 ~ 40cm, pseudo stem skin white, long cylindrical, length 30 ~ 35cm, diameter 1.5 ~ 3cm, Plant weight 0.2-0.3kg. Heat resistance, early resistance, resistance to moisture are good, spicy taste, strong flavor. (2) Production period: Welsh onions in the Yuanzao can be cultivated in the county for one year and can be planted for two seasons a year. Growth period is 180~210 days. Second, cultivation and management 1, sowing preparation (1) bed site selection: seedbed should choose sheltered sunny, high dry terrain, drainage, and convenient transportation, 2-3 years did not plant onion vegetable plots. (2) bed soil preparation: available garden soil 50 ~ 70%, decomposed bar fertilizer 20 ~ 40%, 5 ~ 10% of human waste, compound fertilizer 0.1% evenly mixed, and add 1% enemy pine. (3) Seed treatment: soaking seeds with hot water, soak the seed with gauze, soak in warm water of 50-55°C for 30 minutes, or soak with 0.2% potassium permanganate for 20-30 minutes before soaking. After rinsing, rinse with clear water and then soak in fresh water for 4 to 5 hours. (4) Seeding: sowing on March 12th, sow the bottom of the bed with water before sowing, mix the seeds with fine sand or fine soil, evenly spread the water after seepage, spread the nutrient soil to the surface after 3 to 5 days. 1cm, the last part of the waterproof evaporation cover film, usually pay attention to ventilated wet surface, do a good job of moisture management. 2, seedbed management (1) onion seedlings after the first true leaves grow, to maintain adequate water, water spray should be treated 1-2 times, 3-5 days after the seedlings in the surface of a layer of thin nutritious soil Or 1 to 1.5 cm thick ash or grass. After returning green in the early spring, we will cut the noodles, warming and weeding and weeding, combined with topdressing, watering, and seedlings to reach strong seedlings. Seedlings can be planted in nursery beds, with particular attention to disease prevention. After emergence, 75% chlorothalonil or 25% thioredox can be sprayed 2 or 3 times. To promote the growth of onion seedlings, pay attention to keeping warm, so that water, fertilizer, medicine, and pipe are all kept up. (2) Strong seedlings: The seedling height is 25 cm or more, the light blue diameter is 0.5 cm or more, the tubular leaf color is dark green, and the individual plant has not less than 5 true leaves. 3. Transplanting and colonization (1) Garden selection and treatment: Choose a plot that has not been planted with onions for 3 years. The best irrigation and drainage facilities are convenient, fertile soil, and convenient transportation. The ditch is 95 to 100 cm apart, and the ditch is 40 cm wide and 25 cm deep. Mu Shi decomposed organic fertilizer 3 to 4 cubic meters, compound fertilizer (15:15:15) 50 kilograms, with a small amount of surface soil shaken and scattered into the ditch. (2) Onion seedlings treatment: two days before transplanting, irrigating the water on the seedbed, shovel the seedlings with a spade, separate them by large, medium and small, and soak the roots with 600 times carbendazim for 5 to 10 minutes. It is best to cut off. About 1/3 to 1/4 of the leaves of onion seedlings were transplanted and planted. (3) Colonization: After transplanting the onion, planting 2 to 3 centimeters in diameter, transplanting in the ditch applied to the fertilizer, about 40 pieces can be planted per meter, and the onion shoots must be vertically planted into the ditch, which is the key to ensuring the uprightness of the onion. It is forbidden to plant in the traditional way in order to improve the commercial nature and watering according to the public opinion after planting. 4, field management (1) make-up seedlings: the lack of seedlings should be promptly replanted to ensure that the whole seedlings. (2) Weeding and weeding: Before planting till ridge-sealing, we should combine topdressing and watering for cultivating and weeding in order to increase ground temperature, promote root growth, and control weeds. Cultivate seedlings to avoid injury. Can also be 25% per acre herbicide ether wettable powder 400 grams, 50% paracetamol wettable agent 100 to 120 grams or 48% amylomite 150 to 200 milliliters, dehydrated 60 kilograms are sprayed in front of the planting surface, The weeding effect is better. (3) Earth-covered soil: After easing the seedlings, water is plucked in the back of the plot, and the cultivator loosens the soil. When the seedlings are thicker than 0.8 cm, the first time the soil is covered, the thickness of the stems is about 1.2 cm when the second time is covered, and the top dressing is applied before covering the soil (1000 kg of organic fertilizer is applied to the mu. 30 kg of compound fertilizer. The height of the cover soil was 2.5 to 3.0 cm from the green onion. After the soil was covered twice, the furrows were basically filled. (4) Cultivating earth: When the stem is thick 1.5 cm, the first earth is used; in the 1.7-2.0 cm, the second earth is cultivated; before this earthing, topdressing compound fertilizer 30 kg/mu, or urea, potassium sulfate 15 kg/mu, earth Height 3 cm from the green onion; 20 days before harvest, the third time the soil, leaving 4 new leaves, and the rest all sealed with soil, to ensure that the uniformity of light blue and white. 5, fertilizer and water management onions need more fertilizer, timely fertilizer is an important measure of high yield and quality, top dressing is generally dominated by nitrogen fertilizer, the appropriate allocation of phosphorus, potash fertilizer principles. The general fertility period top dressing 4 to 5 times. After planting and survival, Mushi 20% decomposed human urine 750 ~ 100 kg or urea 7.5 ~ 10 kg, 15 kg of phosphorus with calcium. 6. Prevention and control of pests and diseases The main diseases and pests of the onion include the onion fly, onion thrips, powdery mildew, leaf blight, onion flies, onion thrips, 5% virginity 3000 times solution or 40% dimethoate emulsion 1000 times, etc. Chemical control; powdery mildew, leaf blight can be used 80% spray grams 500 times or 75% chlorothalonil and other agents to prevent and treat every 7 to 10 days once, even spray 3 to 4 times. III. Harvesting 1. Time: According to processing time requirements, there are plans to harvest before mid-November. At the time of harvest, plan the side of the ridge and dig carefully, taking care not to hurt the light blue and onion leaves. 2. Standard: Onion white, tight, hard, upright, more than 35cm in length, 1.5 to 2.5cm in diameter, leaves no pests and diseases, no dirt, no harm to the health of green onions.
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