Early autumn cultivation technique of celery
Variety selection: celery early autumn cultivation, sowing temperature is higher, should use Zhengda crisp yellow Fuqin, glass crispy celery, American Beli celery and other heat-resistant varieties. Sowing and raising seedlings: From mid-June to early July, choose a higher elevation, convenient irrigation and drainage, loose soil and fertile fields as seedbeds, deep tillage soil, adequate basal fertilizer, fully sizing and sowing. Before sowing, soak in seeds with warm water of 50°C for 30 minutes, then soak in fresh water for 12-24 hours, rinse with fresh water, remove seed coat, wash and dry, and wrap with wet cloth for 15-16 hours at 5°C freezer for 15-16 hours. Ventilate in a cool, dry place and keep moist. 50% of seeds germinate after sowing. Sew the bottom water before planting. After the water seeps, sprinkle a thin layer of medicinal soil (3% Mulel granules per acre, 1.5 kg mixed soil 50 kg per acre) and sow the seeds. After sowing, the prepared fine soil is evenly spread on the seedbed and the thickness is to cover the seed. Cover shading nets to prevent rainstorms, put on scaffolds after emergence, and move the shading nets to sheds; or mix celery seeds with a small amount of Chinese cabbage or four seasons daikon or lai radish, the latter growing faster to shade. Generally, the seeding rate per acre seedbed is 1.5-2.5 kg, which can be planted in 3-4 mu land. After the emergence of water and fertilizer management to strengthen, to prevent the impact of heavy rain, late attention to hardening seedlings. Reasonable colonization: seedling age 40-50 days can be planted. The basal fertilizer was applied in time before planting, and the soil was ploughed and soiled with 560-60,000 plants per acre. The plant spacing was 8-12 cm. Planting should not be shallow enough to promote hair rooting and growth. It is also possible to use seeds that have been bred to buds for live broadcasting, strengthen management after sowing, and promote Miao-Qi Miao Zhuang and Dian Miao Ding Miao. Water and fertilizer management: In addition to the application of base fertilizer before sowing and planting, topdressing should be applied thinly, and the quick-acting nitrogen fertilizer should be continuously supplied with phosphorus and potassium fertilizers. Under high temperature stress conditions, spraying 2-3 times of instant boron fertilizer or superphosphate calcium leaching solution during the growth period can prevent petiole from cracking and rotten, and prevent petiole yellowing at the later stage. Spraying 20 mg/L of gibberellin solution 10-15 days before harvest can effectively increase yield and improve quality. Fertilizers must be decomposed at high temperatures and cannot be poured with manure at high temperatures. Avoid flood irrigation, drainage in time after the rain. When watering, make it cool, cool, and avoid high temperature in the afternoon. Earthen softening: Seedlings softened about 30 cm high. 4-5 days prior to earth-cultivation, fertilize one-time fertilizer and pour enough water, wait until it is dry, dry, and dry. Be careful not to injure the plants and prevent the soil particles from falling between the leaves, so as to avoid causing rot. 1-2 times. Prevent pests. By strengthening field management, we will create environmental conditions conducive to the growth of celery, which will not be conducive to the occurrence of pests and diseases, and timely control of the occurrence of pests and diseases by spraying. The main diseases of celery are leaf spot and spot blight, 75% chlorothalonil plus 70% thiophanate-methyl wettable powder (1:1) 1000-1500 times, or 30% copper oxychloride suspension plus 70% Mancozeb Zinc wettable powder (1:1, ie mixed and sprayed) 800-1000 times liquid or 69% Ank manganese zinc plus 75% chlorothalonil wettable powder (1:1) 1000-1500 times liquid, alternating Spray 3-4 times, spray once every 7-15 days, close before the sparse. Virus disease, combined with control of aphids, sprayed with 10% imidacloprid wettable powder 1500 times or 50 anti-inflavor powder 200 times spray control. Nocturnal insect pests were treated with 52.25% farmland emulsifiable concentrate 1000-1500 times or with 300 times adulterate (Bt). Harvesting: Starting in September, it will be harvested and harvested. When the celery plant is up to 50-80 cm, the whole plant is scooped up, and the roots are washed away to remove old leaves and yellow leaves.
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