Traditional celery cultivation is generally carried out from September to December , and harvested from December to April . The anti-season celery is planted in May-June and harvested in August-September . During the high temperature and heavy rain season, it is difficult to cultivate, overcome the high temperature obstacles, and create a good environment suitable for celery growth. It is the key to obtaining high-yield, high-quality and high-efficiency technology.
First, sowing off: celery summer cultivation is mostly using live broadcast method, but also seedling transplanting. In late May to early June sowing, coincides with high temperatures storm season, there is a high demand for variety, should choose heat-resistant varieties of waterlogging. Before sowing, the seeds should be soaked and germinated. In order to prevent the bacteria from being seeded, soak seeds in warm water of 48 °C for half an hour, and then germination, until 50% of the seeds are "white" and then sown. When sowing, the method of sowing or stripping can be used. Watering should be carried out before the sowing. After the water is infiltrated, it will be planted, and the soil will be covered by 0.5-1 cm after sowing . Celery sprouts slowly, and the seedling period is very long. In order to prevent the temperature and the ground temperature from being high, the seedlings are promoted and the rain is prevented from being washed away. The shading should be carried out on the kneading surface. The commonly used shading covers are: straw, straw curtain, shade net, etc. After the emergence, the cover is removed to avoid affecting the growth of celery. After sowing, you should pour small water to keep the surface moist, and timely discharge after rain. The seedling age is controlled in about 40 days, and 5-6 leaves should be colonized.
Second, the planting of the plant: transplanting seedlings transplanted in the previous crop, and timely turn over the ground. 3000-5000 kg of decomposed farmyard manure and 40-50 kg of ternary compound fertilizer are applied per mu . Deeply turn over 20 cm, so that the soil and fertilizer are fully mixed, and the whole is smooth and flat. Stop watering 2-3 days before transplanting , use the shovel to dig the soil, and try not to damage the leaves and roots when planting the seedlings, and let the plants bring some soil to facilitate survival after planting. The celery seedlings are planted according to the size of the seedlings. The planting should be carried out after 5 : 00 pm , and the root water should be leached in time after planting .
Third, the sunshade: celery summer cultivation should cover the shade net to cool and moisturize, which is conducive to growth, reduce fiber, and improve quality. After planting, use a sunshade net to form a shed or a flat shed. The height of the shed is 2-2.5m . The shed is suitable for north and south. During the day, 10 : 00-15 : 00 is better than sunlight. The summer celery should be carried out throughout the growing season. Shading protection. Covering the shade net can reduce the light intensity, reduce the temperature and soil temperature, improve the field microclimate, facilitate 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, help to moisturize and prevent drought, and reduce the mechanical damage caused by heavy rain on celery, sediment pollution and soil compaction on celery; use closed-type full-day coverage It can prevent a variety of pests such as cabbage caterpillar, diamondback moth, and Spodoptera litura from laying eggs on celery, so as to reduce the insect pests and achieve the purpose of less pesticide application.
Third, the field Guanguan: celery grows slowly in the early stage, and it is also a high temperature rainy season, often weeds are harmful, so we should promptly cultivate and weed. Generally, it is combined with cultivating and weeding before each top dressing. Because the roots of celery are shallow, the cultivating should be shallow, as long as the purpose of weeding and loosening is achieved, it should not be too deep, so as not to damage the roots, but affect the growth of celery. Summer celery has a short growth period, so nitrogen fertilizer is the main factor to promote stem and leaf growth. In the fertilization technology, we should master the principle of “applying sufficient base fertilizer and diligently applying thin fertilizerâ€. On the basis of the application of the base fertilizer, the topdressing should be applied, and the first topdressing urea 10 kg should be applied 5-7 days after emergence , and then the topdressing should be applied every 8-10 days, and the urea should be applied 10-12 kg per mu , generally requiring 4 times of topdressing . As the celery plant increases, the amount of fertilizer should also increase. Spraying 2-3 times of instant boron fertilizer or superphosphate leaching solution during the growth of summer celery can prevent petiole cracking and rotten heart, prevent yellowing of petioles at the later stage, and spray 500 times of potassium dihydrogen phosphate on the leaves in the middle and late stages of celery growth. 1000 times 920 mixture, can significantly enhance the celery plant disease resistance, effectively increase production and improve quality. The growth and development of summer celery requires moist environmental conditions. From the start of sowing to the harvesting of celery, it is necessary to ensure that the field is moist and the gully is continuously water to facilitate stem and leaf growth.
Fourth, pests and diseases: Common diseases of celery include rickets, blight, soft rot, leaf spot, anthracnose, etc. The pests include aphids, thrips, mites, and spotted flies. In the seedling stage, the blight disease can be prevented by the seedbed soil disinfection. It can also be rooted at the seedling stage. The agent can use 75 % chlorothalonil 800 times solution or 70 % carbendazim 800 times solution; in the early stage of soft rot disease, Spray with 72 % agricultural streptomycin WP or neomycin oxytetracycline 3000-4000 times; Yeban disease and spot blotch can use 78 % chlorothalonil 700 times solution or 77 % can kill powder WP 500 times Liquid spray; anthrax control can be sprayed with 70 % carbendazim 600 times solution or 80 % anthrax fumei powder 800 times solution; aphids, thrips, mites can be sprayed with 10 % imidacloprid 2000 times solution; control of larvae in larvae 2 The larvae were killed by using 20 % plague net 1000-2000 times solution or 48 % lesbian emulsifiable oil 800-1000 times before the adult, and the adult larvae were inhibited by the 5 % taibao 2000 times solution during the adult emergence period .
V. Harvesting and closing: According to the growth of celery and market demand, timely harvest. Because the summer season of summer celery grows hot and hot, it is not conducive to the growth of celery. Therefore, the harvest is generally earlier than that of autumn celery. When the stem height is 40-60 cm, the quality is good, the yield is high, and the stems and leaves are green. Pay attention to prevent breakage during harvest and keep the whole plant intact.
Source: Fujian Zhangpu County Agricultural Bureau
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