Old vegetable farmers know that the traditional celery is planted in the autumn, celery likes the cold and humid environment, fear of high temperature and drought, summer planting celery belongs to the off-season cultivation, celery is prone to poor taste and low yield, etc. Seasonal cultivation of celery mostly uses shading technology and other supporting measures. Let's take a look at the summer celery cultivation points.
1. Select suitable varieties, suitable temperature germination
Anti-season celery planting is covered by shade net or shade, but the temperature is still high during the whole growing season, which is not conducive to the growth of celery, but the disease is high in high temperature and high humidity environment. Therefore, heat resistance, disease resistance, petiole length and fiber should be selected. Planting less and less aging.
The celery seed has a long dormancy period, and the optimum germination temperature is 15-20 ° C. If the temperature exceeds 25 ° C, germination is difficult. Therefore, another key to the cultivation of celery in the off-season is to artificially create an environment conducive to the germination of celery seeds. Two methods can be used to germination: First, the seeds are placed in the refrigerator freezer, soaked in cold water at 5 °C for 15-18 hours, then taken out to prevent germination and germination in the light and cool place, rinse with cold water in the morning and evening, 7-10 In the day, it can be germinated and sowed; the second is to soak it in normal temperature for 24 hours, wrap it with a breathable cotton cloth, and hang it in the well one meter away from the water surface during the day. Take it out in the cool and ventilated place in the evening, rinse it with cold water in the morning and evening. It can be germinated for 7-10 days.
2. High temperature and high humidity environment, pay attention to the prevention and control of pests and diseases
High temperature and high humidity in summer, pests and diseases are easy to occur, the main pests and diseases of summer celery are: leaf spot, spot blight, virus disease, aphids and so on.
Agricultural measures: remove the weeds around the plot and the dead leaves of the upper crops; use the resistant varieties to disinfect the seeds (use 0.5% potassium permanganate 55 °C aqueous solution for 10 minutes and then germination); Comprehensive measures such as planting, scientific fertilization and regulation of temperature and humidity are used for prevention.
Chemical control: spot blight and leaf spot, can be alternately sprayed with drugs such as mancozeb, carbendazim, tebuconazole, fluoro-manganese-zinc, etc.; virus-selective amino-chain protein, ningnanmycin , lentinan and other chemicals control; aphids can be controlled with imidacloprid, acetamiprid, pymetrozine and other agents, can also use yellow boards to trap aphids.
3. Scientific water and fertilizer management, do a good job of drainage
First of all, fertilizer management: pay attention to the use of decomposed organic fertilizer, apply appropriate amount of chemical fertilizer, mainly in the early stage, with nitrogen, phosphorus, potassium combined application, generally 3-4 times of topdressing, 1 time after fertilization, no need to fill with water . In the middle and late growth stages, 2-3 times of foliar fertilizer can be sprayed in combination with pest control, and potassium dihydrogen phosphate can be used.
Second, water management: according to the characteristics of celery growth, moist and not drought-tolerant, we must always keep the surface moist, it is better to water in the morning and evening, so as not to cause the temperature difference between the surface and the dead seedlings. Drain in time after heavy rain, and spray a small amount of water (using cool well water), rinse the soil on the leaves, reduce soil temperature and eliminate pathogenic bacteria in rain.
4. Cover the sunshade, cover the film and prevent heat rain
Scaffolding cover sunshade net can prevent exposure to the sun, avoid rainstorm, can be made of bamboo, wood or metal material to make arch shed or flat shed, shed high 2-2.5 meters, cover the sunshade net on the scaffolding and fasten, generally cover the net with both sides During the daytime, it is better to illuminate the celery at 10-15 hours, and it is ventilated from north to south. Shading protection should be carried out throughout the growing season to create a good environment for celery growth. In the summer, there are frequent hot rains. Before the hot rain, plastic film can be covered on the sunshade net to prevent hot rain from dripping on the surface and filming after rain. If the membrane is covered in time, the method of spraying the well water can be used to reduce the surface temperature of the soil.
The above is all the content of today. If you are also planting celery in the summer, you can learn more. The article was reprinted from the headline number cloud, and the content is only for reference by farmers.
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