Summer celery cultivation should be good five
Traditional celery cultivation is usually planted from September to December and harvested from December to April. The implementation of anti-season celery is planted from May to June and harvested from August to September. During the growing season, it is a hot and rainy season. It is difficult to cultivate, overcome the high temperature barrier, and create a good environment for the growth of celery. It is the key to obtaining high yield, high quality and high efficiency.
First, sowing off: celery summer multi-use live broadcast method, but also transplanting seedlings. Sowing in early May to late June, when the high-temperature and heavy rain season occurs, there is a high demand for varieties, and varieties with heat-resistance and resistance should be selected. Before sowing, it should be soaked with germination. In order to prevent seeds from contaminating, apply soaking in warm water at 48°C for half an hour, and then germinate until the seeds are 50% germinated and “dew†and sowed. Sowing or sowing method can be used when sowing, sowing the first watering before sowing, until the water seepage after sowing, after sowing cover soil 0.5-1 cm. Celery sprouts slowly, seedling period is very long, in order to prevent high temperature and ground temperature injury seedlings, to promote emergence and prevent heavy rain erosion, should be shaded in the surface, the commonly used shade cover are: straw, straw, shade net, etc. , Remove the cover after emergence, so as not to affect the growth of celery. After sowing, groundwater should be poured into the ground to keep the surface wet and the rain drained in time. Seedling age is controlled in about 40 days, 5-6 leaves should be planted.
Second, the establishment of the customs: seedlings transplanted before the harvest, and promptly turned to the ground. Apply 3000-5000 kg of rotten farmyard fertilizer and 40-50 kg of ternary compound fertilizer per acre. Turn over 20 cm deep to fully mix the soil and fertilizer. Watering should be stopped 2-3 days before transplanting. Dig the seedlings with shovel soil. Do not damage the leaves and roots as much as possible when digging the seedlings. Let the plants bring in more soil to facilitate survival after planting. The celery seedlings are planted according to the size and size of the seedlings. Colonization should be carried out after 5:00 pm, and the root water should be set after planting.
Third, the shade off: summer cultivation of celery should cover the shade net cool and moist, is conducive to growth, reduce fiber, and improve quality. After the planting, use shading nets to form a shed or flat shed, the height of the shed is 2-2.5m, and the shed is suitable for the north and south. During the daytime, the celery is not exposed to sunlight from 10:00 to 15:00, and the whole growth period of celery should be carried out in summer. Light protection. Covering the shading net can reduce the light intensity, reduce the temperature and the soil temperature, improve the microclimate in the field, help the photosynthesis, and provide a more favorable environment for the production of celery. While reducing the temperature, it can also slow down the wind speed, reduce the evaporation of soil moisture, which is beneficial to moisturize and prevent drought, and reduce the mechanical damage, sediment pollution and soil compaction caused by heavy rain on celery, and the hazard of soil compaction to celery; cover all-day cover , It can prevent many kinds of pests, such as cabbage caterpillar, diamondback moth and Spodoptera litura, from spawning on the celery, so as to reduce the pests, so as to achieve the purpose of less pesticide application.
Third, Tian Guan Guan: The celery grows slowly in the early stage, but also in the high-temperature rainy season, and often weeds are harmed. Therefore, the cultivating and weeding should be timely. It is common to combine tillage and weeding before every top dressing. Since the root system of celery is shallow, the cultivator should be shallow, so long as it can achieve the purpose of weeding and loosing soil, and it must not be too deep to avoid damaging the root system and affect the growth of celery. The growth period of summer celery is short, so the application of nitrogen fertilizer is mainly to promote the growth of stems and leaves. In the fertilization technology, we should master the principle of “giving full use of basal fertilizer and diligently applying thin fertilizerâ€. Applying topdressing fertilizer on the basis of applying basal fertilizer, applying 5 kg of urea for the first time after 5-7 days after emergence, applying a top dressing once every 8-10 days, and applying 10-12 kg of urea per mu, generally requiring top dressing 4 times With the increase of celery plants, the amount of fertilizer should also increase. Spray 2-3 times of instant boron fertilizer or superphosphate leaching solution during the growth of summer celery to prevent petiole from cracking and rot, and prevent yellowing of the petiole at the later stage. Spray 500 times of potassium dihydrogen phosphate once in the middle and later stages of celery growth. , 1000 times the 90% mixed solution, can significantly enhance the resistance of celery plants, effectively increase production and improve quality. The growth and development of summer celery requires moist environmental conditions. From the start of sowing until the harvest of celery is on the market, it is necessary to ensure that the field is moist and the water in the sulcus to facilitate the growth of stems and leaves.
4. Diseases and Insects: Common diseases of celery include damping-off, blight, soft rot, leaf spot, and anthrax. Pests include roundworms, thrips, ticks, and spotted lilies. Bacterial damping-off during seedling period, damping-off can be used to control seedbed soil disinfection, can also be watered at the seedling stage, the agent can be used 75% chlorothalonil 800 times or 70% carbendazim 800 times; early soft rot disease, Spray with 72% agro Streptomycin WP or neomycinsemycin 3000-4000 times; Leaves and Spot Blight can use 78% chlorothalonil 700 times or 77% WP WP 500 times Liquid spray; Anthrax prevention and control can be used 70% carbendazim 600 times or 80% anthrax fox beauty powder spray 800 times; locusts, thrips, crickets can be used 10% imidacloprid 2000 times spray control; control of leaf spot fly in larvae 2 Before age, the larvae were killed with 20% spot-potential 1000-2000 times dilution or 48% Locust's beneficiation 800-1000 times, and adults were inhibited with 5% Supiopol 2000 times in the adult emergence period.
V. Harvesting: timely harvesting according to the growth of celery and market demand. Due to hot summer celery growing season, is not conducive to the growth of celery, therefore, the harvest is generally earlier than the autumn celery, when the stem is 40-60 cm high, the quality is good, the yield is high, the stems and leaves green, at this time the harvest price is high. Take care to prevent injury during harvest and keep the whole plant intact.
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