Early spring vegetable seedlings take up a long time, grow slowly, and are susceptible to adverse climate effects. Only through careful management can we achieve the purpose of cultivating strong seedlings and achieving high yields.

1. Cold protection and heat preservation: According to the outside temperature, cover (film or straw curtain, etc.) in time. Master the appropriate temperature and temperature management of seedlings. Temperature management must follow the principles of three highs and three lows: high after sowing to before emergence, which is conducive to seedling emergence and uniform emergence. After the seedlings are collected, the temperature is low. On a sunny day, it should be ventilated at 9-10 a.m. and at 2-3 p.m. The height behind the seedlings promotes the growth of new roots and cannot be ventilated. The back of the living tree is low, cultivate strong seedlings, and ventilate regularly. The seedlings become taller after diarrhea, which is conducive to root stretching. After resuming growth, increase ventilation to prevent excessive growth and strengthen seedling hardening.

2. Ventilation and light transmission: Ventilation and light transmission are the main measures to adjust the temperature, humidity and air inside the seedbed. After the seedlings emerge, open the shed and ventilate the seedlings according to the climate and seedling conditions. After the ventilation starts, A certain amount of time for film removal, ventilation, and light transmission must be maintained on cloudy and rainy days.

3. Fertilizer and water management: Use nutrient soil and generally do not topdress. If the seedlings are thin and weak, you can use 1000 times of natural organic nutrient solution or 500 times of Cibaokang organic liquid fertilizer for foliar spraying 1-2 times. .

4. Prevention of diseases and insect pests: Due to low temperature and weak light during the seedling stage, there are many diseases and insect pests, so timely prevention should be carried out. Focus on the prevention and treatment of damping-off, damping off and root retting, and pay attention to rotation and safe use of medicines. Spraying should not be done on cloudy days in the shed.

5. Timely hardening of seedlings: 7-10 days before planting, according to changes in the seedlings and weather, gradually cool down, increase ventilation time, and harden seedlings to enhance the resistance of the seedlings.