The Technique of Cultivating High-quality Summer Celery Using Shade Net

Xia celery is a kind of supplemental variety during the period of summer shading of vegetables. It is produced in the natural environment in summer. Due to high temperature, it is difficult to emerge, there are many pests and diseases, and the food value is very poor. The use of shade nets to cover cultivation can improve the local microclimate, create suitable environmental conditions for the growth of celery, achieve high yields and high quality, and enrich the summer and autumn "sauce" market. The main growth period of summer celery is in June and August. High temperature and strong light affect the growth of celery, which deteriorates its quality. The use of greenhouse Shade Net cultivation, in mid-September can be harvested in batches listed.

First, choose good breeds. Should choose heat-resistant, disease-resistant, good quality varieties, the general hollow-type varieties are more heat-resistant, such as flat-leaf yellow Holly celery, Xintai celery, etc., some solid varieties such as Kaifeng glass crisp, Italian summer celery, etc. are also strong Adaptability.

Second, afterwards. Summer celery is generally broadcast live from May to June, so it can be used to pick cabbage, zucchini, and cauliflower, etc., which were cultivated earlier in the shed. It can also be used to pick lettuce in early spring and overwinter root leeks.

Third, the soil sowing. After the harvest of the former crops, the plots were promptly extirpated. Each 1/15 hectare of high-quality rotten farmyard fertilizer was 3,000 kg, urea was 20 kg, and superphosphate was 50 kg. After cultivating the rake, it will be about 1.5 meters wide.

Use every other year old seeds, use 3.5-4 kg per 1/15 hectare, soak it in warm water of 48°C for 30 minutes, then continue immersing in cold water for 24 hours, remove and wrap it in wet gauze, place it at 15°C-20°C Under conditions, germination, 5-6 days to bud seeding, during which time with cold water washing again. Seeding needs to be watered ahead of time, broadcast when sowing, or drilled. When spreading, cover 0.5-1 cm of soil. Drilling distance is 15 cm. After sowing, cover the greenhouse shade net, and spray water once in the morning and evening.

Fourth, strengthen post-cast management. 1, weeding. Immediately after sowing, 48% of diammonium EC was sprayed on the ground with 200 g of water and 35-40 kg of water per 1/15 ha of the ground or sprayed with 100 g of 33% of herbicide-treated EC. 2, shading. Excessive light will inhibit the growth of celery, so cover the net in time. The old film is generally kept rain-proof at the top of the roof, and the SZW-8 black shade net is covered with the film. The Sunshade Net is not covered around the lower part to keep it ventilated, but it does not cover the shading net at the same time on cloudy days and nights. 3, fixed seedlings. When the seedlings have 1 true leaf, the first time the seedlings are to be planted, keep the seedling distance 1-1.5 cm, 2-3 true leaves when the second time the seedlings, keep the seedlings from 2-3 cm, 5 true leaves when the Dingmiao The seedlings are about 5 cm away. 4, fertilizer and water management. After the emergence of celery to 20 days before harvest, to keep the ground moist, it is best to water 1-2 times a day to meet seedling growth and reduce the temperature. Watering is performed every 10-15 days after seedlings are sown, and urea is applied to 5-10 kg per 1/15 ha. 5, spray gibberellin. About 30 days before harvesting, 30 mg/L gibberellin was sprayed for 1-2 times, and the interval was 7 days, which significantly increased the yield. 6, strengthen pest control. During the growth period of summer celery, attention was paid to the use of low-residue pesticides for the control of spot diseases, viral diseases and soft rot and aphids. 7, timely harvest, to avoid fibrosis, so the plant grows into timely harvest.