1, low temperature germination
Generally, seeds are soaked 7-8 days before sowing. First, remove the shell and withered seeds and soak them in clear water for 24 hours. If the seeds are soaked in warm water at 60 ~ 70℃, warm water is poured in while stirring until they are not scalded, and the seeds are soaked for 12 hours. Wash the mucus from the seeds, wipe off the epidermis, spread out and dry the seeds. When the seeds are semi-dry, mix them with fine sand 5 times the volume of the seeds, put them in a wooden box, accelerate germination at 15 ~ 20℃, and put them next to an indoor water tank.
2. Regulator accelerates germination
Some varieties of seeds have a dormancy period of 1~2 months after harvest. If the new seeds harvested in the same year are used to accelerate germination, it is often difficult to germinate, and the germination time is long and irregular. So we can use 5 mg/L gibberellic acid, add 4 kg of water every 20 ml, soak the seeds for 12 hours, and then take them out for sowing. Seeds can also be refrigerated for 30 days.
3. Change the temperature to accelerate germination
After soaking the seeds, put them in an incubator at 15 ~ 18℃, raise the temperature to 22 ~ 25℃ after 12 hours, then lower the temperature to 15 ~ 18℃, and take them out for about 3 days.
Solutions to rotten roots of celery
The main cause of celery root rot is the lack of some nutrients in the soil after continuous cropping, which affects the growth of celery seedlings. The seedbed soil is not disinfected and harmful bacteria continue to spread; The application of unfermented farmyard manure will promote the spread of germs and eggs and seriously endanger the growth and development of celery. The following comprehensive control measures should be taken:
1, prevent continuous cropping and implement crop rotation.
2. Apply sufficient agricultural organic fertilizer and biological fertilizer; Scientific irrigation, small water irrigation, prevent flooding and reduce field humidity.
3. Cultivate healthy seedlings: the greenhouse temperature at seedling stage is 15~ 18℃, so as to prevent high temperature, properly control water and prevent seedlings from growing white. The film should be uncovered and hardened at low temperature 7~ 10 days before planting; After planting the seedlings, we should water them less, loosen the soil more, squat down the seedlings to promote the roots, and lay the foundation for high yield.
4. Drug control
At the seedling stage, the diluted spray of Kairun or Tribe Bay was sprayed once every 7~ 10 day and twice continuously. Before and at the early stage of onset, spray this product or Baitai, Kairun+Pinrun diluted spray 2~3 times, every 7~ 10 day 1 time.