(1) Biological characteristics The roots of celery are shallow and small. The celery prefers a cool and humid environment. The optimum temperature for germination is 15-20 °C. The germination is slow and not uniform at high temperature, but the seedling stage is resistant to high temperature, and the seedlings can tolerate the low temperature of -7 °C. Celery requires low temperature to pass through the vernalization stage and twitch and flower through the light stage under long daylight. (2) Cultivation season and variety selection Although celery can be cultivated for more than one year, from the soilless cultivation of protected areas, it should be the most productive and most effective autumn and winter glutinous rice. It is usually planted in early August, planted from early September to early October, and harvested around January. There are two types of celery cultivated in northern China: 1. Real straw celery The petiole is full, the texture is crisp and tender, the yield is high and the storage is strong, the adaptability is strong, and it is not easy to convulsion, but the growth rate is slow, suitable for autumn and winter and wintering protection. Representative varieties include taitai sesame celery, Tianjin yellow seed celery, Shanghai green celery and so on. 2. Empty straw celery The petiole is hollow, the texture is thicker, and the growth speed is fast. The representative varieties include Shandong Fushan celery, Yantai large flower celery and so on. In addition to the above-mentioned commonly cultivated parsley, in recent years, a variety of celery, celery, has been cultivated in many areas. Celery is a celery variety introduced from abroad for more than a decade. Generally speaking, the petiole of the celery is slender and the content of crude fiber is relatively high, while the petiole of celery is thick and thick, the crude fiber content is low, the consumption is brittle, the taste is good, and the yield is high, but the scent of celery Not as good as this parsley. However, the output is high and the economic benefits are good. (3) Soilless cultivation methods Celery can be NFT, DFT, rock wool cultivation or other substrate cultivation. There are not many reports on soilless cultivation of celery in China. According to the research on soilless cultivation techniques of celery rock wool by relevant experts, it is considered that the cultivation of celery by using geothermal rock wool is not only low in cost, but also good in effect, and suitable for China's conditions. Promote application in production. The method is: leveling the ground and hitting the soil layer to form a trough body with a depth of 20 cm, a width of 60 to 100 cm, and a length of about 10 m. The trough is extended from north to south, with a slope of 1:70 and a groove spacing of 30 cm. A layer of 0.lmm thick polyethylene film is placed inside to fill the matrix of rock wool, vermiculite or river sand. After the seedlings are planted, they are planted at a row spacing of 10 cm (the spacing of the celery plants is 20 cm 30 cm), and one seedling is planted per hole, and 40,000 to 50,000 plants can be planted each time. Timely supply after planting, generally do not need to slow down the seedlings. (4) Cultivation management 1. Nutrient solution formula First, the selected special celery nutrient solution formula (Table 1) has good cultivation effect, the formula EC value is 1.75ms/cm, the pH is adjusted to 6.0-6.5; the second is the single compound fertilizer (15:15:15 Phosphorus potassium nitrate ammonium) 1000mg / L. The EC value was 1.7 ms/cm, and the pH was adjusted to 6.0 to 6.5. 2. Post-plant management (1) Temperature management Celery is a cold vegetable, it is very important to control the temperature to adapt to celery. Generally speaking, the seedling stage has strong adaptability to temperature, and in the product formation stage, the temperature requirement is relatively strict. Generally, the suitable temperature during the day is maintained at 18-25 °C, and at night it is 12-15 °C. The nutrient solution temperature is 18 to 20 °C. The root temperature is lower than 15 °C for a long time, which is unfavorable. (2) Nutrient fluid management In the different growth stages of celery, the amount and frequency of liquid supply should not be the same. During the growth period, the liquid is supplied 2 to 3 times a day (drip or watering), and can be appropriately reduced in the early and late stages. If the nutrient solution is not recycled, water should be poured once every few days. (5) Harvest at the right time After celery seedlings are planted about 50 to 60 days, when the plant height is about 70-80 cm, they are harvested according to market needs. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Foot Spa Machine,Foot Tub Spa Pedicure,Foot Bath Massager,Bubble Foot Spa Huaian Mimir Electric Appliance Co., LTD , https://www.nbmimirfootspa.com