Spring onion cultivation techniques

1. Variety selection Anniversary cultivation should choose cold-tolerant, drought-tolerant, heat-resistant, adaptable, long, and non-tiller varieties, such as Chinese giant onion and Zhangqiu green onion.

2. Stubble arrangement

(1) From January to March, spread in the greenhouse on flat borders, and harvest from March to May.

(2) In mid-to-late March, flat-border sowing in a small arch shed, harvesting in June, or transplanting in early and mid-June, harvesting in October to November or winter storage.

(3) Open-field sowing seedlings in early April, transplanting in mid-to-late June, wide borders and dense planting, overwintering in open fields, removing flower buds from March to April of the following year, and harvesting from April to May.

(4) Planting seedlings from July to August, transplanting from September to early November, densely planted (3 cm spacing between plants), overwintering in the open field, removing flower buds from March to April of the following year, and harvesting from May to July.

(5) Sowing and raising seedlings in mid-to-late September, overwintering in the open field, and harvesting from March to April the following year.

(6) Sowing seedlings in mid-to-late September, transplanting in mid-April of the following year, harvesting in July to August, or transplanting in June of the following year, harvesting in October to November, or winter storage.

(7) Seed in the greenhouse from late August to early September, shed sheds in mid-October, and harvested from December to February the following year.

Three, management technology

(1) Seedbed management in winter and spring. Before overwintering, green onion seedlings should have 2 to 3 leaves. According to the temperature and soil humidity, water overwintering water once before freezing, and then cover with a layer of fully decomposed farmyard manure to protect moisture and heat, and ensure the safe overwintering of seedlings. In spring, the temperature rises and the seedlings enter the fast-growing period. First, thinning should be carried out 1 to 2 times to make the seedling spacing about 3 cm. Second, combined with watering, topdressing quick-acting nitrogen fertilizer or nitrogen, phosphorus and potassium compound fertilizer 2 to 3 times, 10-15 kg per mu each time, to promote the rapid growth of seedlings, harvest small shallots on the market or cultivate strong seedlings for transplantation.

(B) Summer seedbed management. When the seedlings are raised in summer, in the hot and rainy season, the key to management is to do three preventions: first, prevent pests and diseases. Second, prevent weeds. After sowing, before emergence, use 33% Weeding Tong 100ml spray per mu to seal the soil, and manually pull the weeds 2 to 3 times to completely eliminate weeds. 3. Waterproof, the seedbed should be irrigated by drought and drained by waterlogging, and no water should accumulate in the seedbed.

(3) Transplanting. Before transplanting, apply foot base fertilizer, 6,000 kilograms of fully decomposed high-quality farmhouse manure, 30 kilograms of phosphate fertilizer, and 50 kilograms of nitrogen, phosphorus and potassium compound fertilizer per acre. When transplanting, seedlings should be graded. Large and small seedlings cannot be mixed. If green onions are on the market, they can be planted appropriately, with a row spacing of 60 to 70 cm and a plant spacing of 3 to 4 cm; if the green onions are on the market, the row spacing is 80 cm and the plant spacing is 5 cm. After transplanting, it is necessary to plow the soil in time, level the ridges, break the compaction, and promote the growth of the roots of the green onions. Combined with watering and topdressing NPK compound fertilizer, topdressing 30 kg per mu. Depending on the growth of green onion seedlings, cultivate soil in time to promote the formation of green onion.

4. Soil treatment technology for continuous stubble field Green onions should not be planted continuously, otherwise the yield will be seriously affected. If continuous stubble is planted, the soil must be treated.

(1) Increase the application of fully decomposed farmyard manure and phosphorus and potassium fertilizers to supplement the trace elements required for the growth of green onions, such as sulfur, zinc, calcium, magnesium, and iron, to promote the healthy growth of green onions and improve disease resistance.

(2) Use Luheng No. 1 to sterilize the soil.

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