Celery planting: how to grow celery in summer and autumn?

How to grow celery in summer and autumn? Please introduce the method of planting celery in summer and autumn with reference to the following three aspects: sowing and breeding of celery in summer and autumn 1, sowing time: sowing in the middle of June, the seedling age is controlled at about 40 days. Properly shortening the seedling age can improve the colonization survival rate and shorten the slow seedling period. 2. Seed soaking and sprouting of celery: because celery is a cool crop, sowing in high temperature season should be accelerated at low temperature. You can choose to soak in water for 12 hours and then add "1992 ○" or Aiduo, etc., and soak for another 12 hours. Wash and drain the inflated seeds, put them in a wet cloth bag and put them in the refrigerator for 3-5 days, the temperature is controlled at about 7 ℃, wash once a day, and 30% of the seeds can be sown. 3. Celery seedbed preparation: select unplanted celery land as seedbed, and apply appropriate amount of mature farm manure as base fertilizer 7 days before sowing. Every square meter of seedbed is disinfected with mancozeb or topiramate 1.5 grams. General seedbed area of 80 square meters, sowing about 150 grams. 4. Sowing celery in a shade shed: spread the exposed white seeds evenly on the seedbed, then cover them with rice husk 2 cm thick or with rotten pig manure until the seeds are not seen. After building a shade shed, the shed is covered with a film and two-layer sunshade net, which is about 1 meter high, which can not only prevent rainstorm erosion, but also shade and cool down. If the weather is fine after sowing, water can be watered once every morning and evening to cool and moisturize and facilitate seedling emergence. Planting and management of celery in summer and autumn 1. Colonization and application of base fertilizer of celery: when the seedling age is about 38 days, it begins to be planted, first big seedlings, then small seedlings. Before planting, 667 square meters (1 mu) applied barnyard manure 4000kg to 5000 kg, while adding some phosphorus and potash fertilizer. If plant ash is applied on the border and then planted, it is extremely beneficial to live plants and growth. under normal circumstances, celery should mature 3 days earlier, the yield will increase by 15%, and the amount of plant ash is 50 kg per 20 square meters. Because celery grows fast and grows small under high temperature and heat, the density can be slightly higher, with a general hole spacing of 10 cm and a row spacing of 15 cm, with 6 plants per hole. 2. Shading and management of celery: cover with shading net immediately after planting, in order to save the amount of net, the height of the shed is convenient for operation, each net interval is 50 cm, in order to increase direct light. In case of continuous sunny and dry weather, irrigation can be used to cool the border (do not spread the border) to facilitate the growth of celery. There is no need to expose the net during the coverage period. In the middle stage, quick-acting fertilizer can be applied appropriately, such as urea, human feces and urine and so on. In the later stage, the application of 15kg potassium chloride with 667 square meters could greatly increase the weight of single plant. 3. Application of trace fertilizer and growth regulator of celery: celery is very sensitive to boron, especially under the condition of high temperature and humidity. Spraying 0.1% boric acid and 0.1% superphosphate leaching solution for 3 times during the growth period can prevent leaf stem cracking and heart rot, prevent late yellowing, and is also very beneficial to plant growth. At the same time, it can spray foliar fertilizer such as Ye Mian Bao and Fei Bao. Spraying gibberellin once 10-15 days before harvest with a concentration of 100 mg / kg can increase the yield and improve the quality. The main diseases and insect pests of celery in summer and autumn are early blight, spot blight and aphids. At the initial stage of the disease, spray 75% chlorothalonil 600x solution or use 1 ∶ 0.5 ∶ 200Bordeaux solution plus 0.1% sulfur powder spray, 667m2 spray 30kg 40kg, once every 7 days, 2 times continuously; insect pests can be sprayed with 0.4% aphid 400 times 600 times liquid plus 0.1% washing powder spray, or with 50% dichlorvos 500 times 600 times solution. Click to get more celery planting techniques click to get more vegetable planting techniques