Onion autumn seedlings generally sowed in early September, early spring and easy convulsions, too late to be frozen to death; winter before the seedlings with 2-3 leaves, plant height of 10 cm, false stem base 0.5 cm or less. Seed treatment: soak the seeds in clean water for 10 minutes, remove the seeds of the seeds, and then put the seeds into warm water of about 65 to 20-30 minutes and stir continuously. Seed soaking can be unearthed 1-2 days in advance.
Sowing: New seeds used in the year, 3-4 kg per acre sowing rate, for planting 6-8 acres of land; if you use the last year of Chen seeds should increase the amount of seed more than doubled, more than two years of seed can not be used . When sowing can be spread and drilled. The seedbed is filled with bottom water and evenly sowed, then covered with fine soil about 1 cm. Drilling is to open a shallow trench of 1.5–2 cm depth in a 12 cm row within the pods. Management: Before and after the emergence of scallions to keep the seedbed moist to ensure the normal unearthed seedlings. After emergence, until the winter, generally no drought or water, according to the use of base fertilizer and growth of seedlings watering fertilizer. Pour frozen water before freezing. When the average temperature rose to 13.5 on the same day when the onion returned to green, the water began to return to Qingshui, and green manure was applied at the same time. After that, the seedlings, cultivators, water control, and seedlings were planted for 12 to 15 days. After the seedlings, the onion shall enter a vigorous growth period, and 2-3 times of watering fertilizer shall be applied during this period. Application of urea 20-30 kg per mu. The seedlings: The seedlings generally must be divided into two times; the autumn seedlings are planted in the slow seedling stage after the second year of pouring back to Qingshui, the seedling distance is kept at 2-3 cm; the second time is about 20 cm. Actual conservation of 140,000 or so per mu. The drilled seedlings can meet the above requirements and reduce the distance between the plants to maintain sufficient nutrient area per plant.
Cultivate strong seedlings: The standard of strong seedlings is that the height of seedlings is 50cm above and below, and light green and white are 25cm long and up. The color of the leaves is dark green, the leaves are kept 5-6 pieces, and the weight per plant is more than 40g.
Pest control: Insect pests of young onion seedlings are light, and they need to be prevented and treated in time.
Virus Collection And Preservation System
Virus Sampling Tube,Covid-19 Virus Collection Kit,Virus Sample Collection Swabs,Virus Collection And Preservation Kit
HANGZHOU DIAN BIOTECHNOLOGY CO., LTD. , https://www.dianbiotech.com