How does celery grow without soil? What are the main points? Celery is cool and moist, but it has strong adaptability. It is widely cultivated in China and is well received by the market. Cultivation by soilless cultivation has a significant effect on increasing yield and improving quality. The soilless cultivation techniques of celery leafy vegetables are now brought to you for reference only.
(1) Biological characteristics
The roots of celery are shallow and small. The celery prefers a cold 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 a low temperature of 7 °C. Celery requires low temperature to pass through the vernalization stage, and it is twitched and flowered by 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 land, 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 it is resistant to storage. It has strong adaptability and 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 petioles of the celery are slender and the content of crude fiber is relatively high, while the petioles of celery are thick and thick, the crude fiber content is low, the consumption is brittle, the taste is good, 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, and 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 distance of the celery plant 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 ammonium nitrate) 1000mg / L. The EC value was 1.7 ms/cm, and the pH was adjusted to 6.0 to 6.5.
The trace elements of the above formula are added as constants.
Table 1 Celery nutrient solution formula
2. Post-plant management
(1) Temperature management
Celery is a cool 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 for growth.
(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.
The above is all the content of today. If you are interested in soilless cultivation, you can recommend Huinong.com to more farmers who are interested in this piece.
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