During the nursery period, measures such as heat preservation shall be used to sow about 1 kg per acre seedbed, soaking the seedbed with water before sowing, covering 2 mm thick fine soil after sowing, and then building a small arch shed for insulation.
The seedlings are sprinkled with water once they are unearthed, and the seedlings can be released after 2 days. After the seedlings are removed, the arch sheds are removed and small water is poured to keep the seedbed soil moist. Wait until the 3-4 leaves can be followed by a certain amount of nitrogen fertilizer, 4-6 leaves when planting. What needs to be reminded is that the seedbed is irrigated before planting so as to raise seedlings.
Greenhouse celery colonization, the general use of farmyard fertilizer 4000 kg per mu, phosphate fertilizer 40 kg, 20 kg of ammonium bicarbonate, planting spacing of 10-12 cm per plant, the depth of planting in accordance with shallow rootless, deep not suitable for seedlings.
After planting, seedling management should be strengthened to keep the soil moist. In the initial stage, the soil should be often watered. The heart of celery leaves should turn green. After the new roots are established, the amount of water should be controlled, and the loose soil should be preserved. After applying 25 kg of ammonium sulfate per acre, each 3- Water 1 time in 5 days.
Seedling stage to strengthen the prevention and control of pests and diseases, spot blight is a common disease of celery, 75% chlorothalonil or 70% thiophanate-methyl 600 times spray control, spray every 5-7 days. Aphids and red spiders are the main pests of celery and can be treated with triclosan 1000 times spray.
 Injection Device
Syringes can also call Disposable Medical Supplies, Disposable Syringe With Needle and Plastic Needle Tube such as some scientific instruments in chromatography to inject through the rubber septum. Injecting gas into a blood vessel will cause an air embolism. The way to remove air from the syringe to avoid embolism is to turn the syringe upside down, tap it lightly, and squeeze out a little bit of fluid before injecting into the bloodstream.
In some cases where accuracy is not the primary concern of germs, such as quantitative chemical analysis, glass syringes are still used due to the small error of the glass syringe and the smooth movement of the push rod.
You can also inject some of the juices into meat with a syringe to improve taste and texture while cooking, or into pastries when baking. Syringes can also fill ink cartridges with ink.
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