First, the selection of green onion species:
Four-season planting should select cold-tolerant, drought-tolerant, heat-resistant, adaptable, long-lasting, long-stemmed, and non-harvest species, such as Chinese giant onions, Zhangqiu scallions (Gaojiao), or local farmers. Points onion species should not be used for the four seasons culture.
Second, the cultivation of green onions:
From November to March, the cultivation in the simple solar greenhouse will be broadcast in the flat and the market will be listed in March and May.
In the middle and late 23rd of this month, cultivation was done in a small arch shed and sowing was broadcast in the flat. In June, Xiaoqingui was listed. It can also be transplanted in mid-June and harvested on the market from October to November.
The cultivation of seedlings in the open season in early June, the planting and transplanting of broadleaf in the middle and late June, the wintering in the open field, the removal of flower buds from March to April in the following year, and the green breeding in April to May.
From July to August, the seedlings were cultivated and planted in early September and early November. The plants were densely planted (plant spacing 3cm), exposed winter, and flower buds were removed from March to April in the following year, and were listed on May and July.
The seedlings were cultivated in the middle and late of the 59th, and the seedbeds were exposed to winter, and Xiaoqingui was listed on the March-April of the following year.
The seedlings were cultivated in mid-to-late of the 69th, transplanted in mid-April of the following year, harvested in July-August, or transplanted in June, and harvested in the market from October to November.
From late August to early September, the greenhouse is cultivated. In mid-October, the shed is housed. From December to February, Xiaoqingui is listed.
Third, onion management key:
1, winter and spring seedbed management
Before wintering, the seedlings should have 2 to 3 leaves. According to the temperature and humidity of the soil, one overwintering water should be poured before freezing, and then a layer of decomposed farmyard manure should be covered to ensure the safety of the seedlings. In the spring, the temperature rises, and the seedlings enter a period of rapid growth. The first time is between 1 and 2 seedlings, and the seedling distance is about 3 cm. The second is to combine water-sprinkling 2 to 3 times of topdressing available nitrogen fertilizer or ternary compound fertilizer, each 10 to 15kg/667 square meters, to promote the rapid growth of seedlings, or Xiaoqingui listed or cultivate strong seedlings for transplanting.
2, summer seedbed management
Summer nursery is in high temperature and rainy season, the key to deal with is to do a good job in the three defenses, one to prevent pests and diseases, the second to prevent grass damage, avoid grass seedlings. Before the emergence of the crops, the soil was turned off with 33% of weeds and 100ml of spray per 667 square meters, and artificial weeding was performed 2 to 3 times to completely eliminate weeds. Three waterproof stains, seedlings to do drought can be poured, can be arranged, can not be seedbed water.
3, onion transplant management
Before transplanting, adequate base fertilizer should be applied. Every 667 m2 of farmland should be treated with 6,000 kg of high-quality farmyard fertilizer, 30 kg of phosphate fertilizer and 50 kg of ternary compound fertilizer. The total amount of basic fertilizer should be removed 1/3 of the time, and 2/3 of the total population should be collected. When transplanting, seedlings should be graded. Large and small seedlings cannot be mixed. Green marketing can be properly planted, row spacing 60 ~ 70cm, plant spacing 3 ~ 4cm, made of onion market, then spaced 80cm, spacing 5cm. After transplanting, timely cultivating loose soil and flat ridge should be carried out to remove roots and promote root growth. In conjunction with spraying water, available nitrogen, phosphorus and potassium compound fertilizers can be applied. After 667 square meters of topdressing 30 kg, the seedlings can be cultivated in time to cultivate earth and promote the construction of light blue. Http://Content/f03d4bb5-d846-4357-b0c7-f8f56e2c54d9?cType=2
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