What season is celery for vegetables? Soilless cultivation technique

Celery is a common vegetable variety in our daily life. It can be used for cooking, stuffing and so on. It is very popular with consumers. Celery is a kind of vegetable with a high content of fiber, which has the effects of moistening the intestines and lowering blood pressure. Celery is planted in many places in China, mainly celery, water celery, parsley and so on, which are different in appearance and taste. Now let's take a look at what season celery is. Soilless cultivation techniques are attached.

What season is celery for vegetables?

Celery is mainly sown in autumn and is generally evenly sown from early July to October. Guangzhou is warm in winter and can be broadcast until December. Early sowing began to harvest from September to October, and late sowing could be harvested from March to April of the following year, that is, before bolting. For spring cultivation, March is the suitable sowing time in the Yangtze River basin, and it is easy to bolting early.

2. Soilless cultivation techniques of celery

The root system of celery is shallow and few, and celery likes the cold, cool and humid environment. The optimum temperature for germination is 15-20 ℃. The germination is slow and irregular under high temperature, but the seedlings can endure high temperature at seedling stage, and the seedlings can also endure the low temperature of-7 ℃. Celery is required to go through the vernalization stage at low temperature and bolting and blossom under long sunshine.

(1) soilless cultivation of celery

Celery can be cultivated by NFT, DFT, rock wool or other substrate. There are few reports on soilless cultivation of celery in our country. according to the "study on soilless cultivation Technology of celery Rock Wool" conducted by relevant experts, it is considered that using geosyncline rock wool to cultivate celery not only has low cost and good effect, but also is suitable for the conditions of our country. It is easy to be popularized and applied in production. The method is as follows: leveling the ground, compacting the soil layer, making a trough with deep 20cm, wide 60~100cm, about 10m long, extending from north to south, slope 1:70 and slot spacing 30cm. Covered with a layer of 0.lmm thick polyethylene film, filled with rock wool, vermiculite or river sand and other substrates. After the seedlings were established, they were planted according to the row spacing of 10cm plants (the row spacing of celery plants was 20cm × 30cm). One seedling was planted in each hole, and 40 000 ~ 50 000 plants could be planted each time. Provide liquid in time after planting, generally do not need to slow seedling.

(2) soilless cultivation and management of celery

1. Nutrient solution formula

One is that the formula of special celery nutrient solution (Table 1) has a good cultivation effect, and the EC value of this formula is 1.75ms, and the pH of this formula is adjusted to 6.0cm 6.5. The other is to use compound fertilizer (ammonium phosphate, potassium nitrate at 15:15:15) 1000mg/L. The EC value was 1.7 Ms and the pH value was adjusted to 6.0cm 6.5.

two。 Post-planting management

(1) temperature management

Celery likes cold vegetables, so it is very important to control the temperature to meet the needs of celery.

Generally speaking, the seedling stage has a strong adaptability to temperature, but in the product formation stage, the temperature requirement is relatively strict. It is generally suitable for the temperature to be kept at 18: 25 ℃ in daytime and 12: 15 ℃ at night. The temperature of nutrient solution is 18-20 ℃. The root temperature is lower than 15 ℃ for a long time, which is disadvantageous to the growth.

(2) nutrient solution management

In different growth stages of celery, the amount and frequency of liquid supply should not be the same. During the peak growth period, the liquid was supplied 2 or 3 times a day (drip irrigation or irrigation), which could be reduced appropriately in the early and later stages. If the nutrient solution is not recycled, it needs to be watered every few days.