Celery planting It has a long history, and its plants are not very tall and grow faster. It is suitable for greenhouse planting and greenhouse heat preservation hydroponics. greenhouse plant The artificial microclimate environment is created, which can keep warm and keep moisture, and cultivate out of season. However, it is difficult to control the internal humidity of greenhouse planting, and the air environment is not as good as that of the outside world. There are some shortcomings, which are also the focus of celery management in greenhouse.
1、 Seedling management
There is no need to soak seeds when sowing, because the seeds are relatively small, so it is better to use seedling tray to raise seedlings, so as to reduce the disease at seedling stage and hidden pathogens. Seedling tray can save the amount of seeds, high seedling rate, and then management is convenient, can be moved freely, directly in the greenhouse hydroponics seedlings, nutrient soil should be disinfected, seedling tray floating in water after growing roots. Greenhouse film transmittance should not be too high, light temperature should not be too strong. The nutrient solution can be directly prepared for irrigation.
2、 Transplanting management
Transplanting directly in the border planting, transplanting can directly take seedlings, transplanting with nutrient soil, basically do not damage the root system. After planting, it should be kept moist until new leaves grow. After the seedling is slowed down, the root system will start to grow, but it should be watered many times, but it should not be watered thoroughly, so as to guide the root system to root down. After that, they will squat the seedlings. During the squatting period, they should apply less fertilizer and water, and in the later stage, they should apply light fertilizer water.
3、 Growth management
At this time, a large amount of fertilizer and water supply is needed. Celery is resistant to fertilizer, mainly nitrogen fertilizer, followed by phosphorus and potassium fertilizer. Nitrogen fertilizer is mainly used for leaf growth, and the mobility of phosphorus fertilizer is poor, so it is mainly used in the early stage. Celery stem needs potassium fertilizer to keep upright and glossy, but not too much, easy to harden. It needs more trace elements such as boron and calcium. Calcium deficiency causes dry heart disease, boron deficiency causes black heart disease, and potassium fertilizer inhibits the absorption of calcium and boron.
2. Temperature and humidity
It can grow at low temperature below - 10 degrees, but the best temperature is 15 to 20 degrees. Under high temperature, the growth is slow or even stopped. But you can use the film with higher light transmittance, which can lower the temperature. As long as the temperature in the greenhouse should be reduced at night. On a sunny day, it's only 20 to 22 degrees. The number of watering in the shed is less than that in the open field. It is better to use drip irrigation instead of flooding. The water vapor generated will condense and drip and cause diseases, and the humidity is too high. Just watch the soil dry and water it.
Celery greenhouse planting in order to create a suitable environment for celery growth, but I think greenhouse planting is mainly suitable for winter cold areas. The difference in management is caused by the influence and limitation of small environment. To learn more about agriculture, please continue to pay attention.