What is the celery planting temperature requirement? What are the planting precautions?

Celery is a kind of green and healthy vegetable, which can be divided into water celery, celery and parsley, each of which has its own characteristics. Celery is planted in many places in our country, and the requirements for planting environment are also different. Let's take a look at the celery planting temperature requirements. What are the planting points for attention?

What is the temperature requirement for celery planting?

Celery is a cold-tolerant vegetable, which requires cold and humid environmental conditions. Celery is cultivated in the greenhouse, the temperature is 15-23 ℃ during the day, the highest temperature is not more than 25 ℃, the highest is about 10 ℃ at night, and not less than 5 ℃. The temperature in overcast, rain, snow and wind days is lower, but not too low to prevent frost injury and early bolting. Proper ventilation according to humidity can reduce air humidity, reduce diseases, assimilate use, reduce respiratory consumption, and enrich and enlarge petioles.

II. Matters needing attention in celery planting

1. Variety selection: variety is an important condition for increasing yield. We should select varieties with high yield, good disease and insect resistance and cold tolerance.

2. Seed treatment: celery seeds will germinate slowly or even not because there is a layer of oil-waxy substance on the epidermis. Before sowing, we can soak the seeds in clean water and rub the seeds with our hands to get rid of the oil and wax. Soak the seeds in clean water for 24 hours, then remove them, rinse the impurities with water, wrap them with gauze, put them in the refrigerator and control the temperature at about 5 degrees. Pay attention to washing the seeds every day, after two days, hang them in a bright environment, rinse with clean water twice a day, and blow-dry the seeds, which can germinate in 5-7 days.

3. Sowing at the right time: overwintering celery in protected areas is usually from early August to early September. Spring sowing protected cultivation sowed from the end of January to the beginning of March. Sowing seeds in the open field should be sown in mid-April. In the case of cold climate, the cover can be uncovered sooner or later through the grass curtain, pay attention to heat preservation, avoid frost damage in the seedling stage and prevent vernalization of seedlings.

4. Field selection: celery has strict requirements on soil, generally choose the soil with deep soil layer, loose soil, good ventilation, strong ability of water and fertilizer conservation, but not easy to be cultivated in sandy soil.

5, fixed value transplanting seedlings: wait for celery to grow to 3-4 true leaves, set the value according to the seedling distance of 8-10 cm, and pour enough bottom water to promote the slow seedling.

6. Field management: after setting the value of celery to the slow seedling stage, it is necessary to water frequently and water a little to keep the soil moist. When the new leaves grow, ploughing properly and squatting seedlings. It is necessary to water and fertilize after squatting seedlings, generally applying 5 kilograms of humic acid water-soluble fertilizer per mu every 15 days. During the growth period, foliar fertilizer can be sprayed for 2-3 times, which plays a good role in increasing yield. 15-20 days before harvest, gibberellic acid solution can be sprayed to increase the weight and weight of celery. When the celery stem cracking occurs, 0.2% boric acid solution can be sprayed to prevent the occurrence of boron deficiency in celery.

7. Pest control: the common diseases of celery are soft rot, spot, leaf spot and so on. Pests include aphids and so on. Specific diseases and insect pests should be controlled scientifically according to the actual situation and scientific control measures should be adopted.

8. Timely harvest: before the celery stalk is grown, do not harvest when the bolting plant is aging, which will affect the quality of celery.