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Greenhouse vegetable planting management points attention!
In early spring season, vegetable planting in greenhouses needs special attention. The following are some management points: picture Maintain the right temperature Maintain the right temperature Control the temperature. The optimum temperature for photosynthesis of greenhouse vegetables is 20℃ to 30℃. In the early growth stage (first flowering, first fruit stage) the required temperature is low, and in the late (full fruit stage) the temperature is slightly higher. The temperature in the greenhouse at night should be kept at 15℃ to 20℃. Therefore, attention should be paid to timely ventilation cooling when the temperature rises. picture Strengthen ventilation to reduce humidity As the temperature rises, the air humidity in the greenhouse is easy to be too high, leading to the breeding of diseases. To strengthen ventilation, reduce humidity, appropriate ventilation. The vent should be located in a sheltered place, so as not to cause flash seedling. At the same time, when irrigation is short of water in the field, flood irrigation should be avoided. picture Proper topdressing After the growth and development entered the middle and late stage, the fertilizer requirement of the plants increased, and the phenomenon of defertilization was easy to occur, leading to premature aging of the plants. At the same time, the frequency and amount of watering should be increased appropriately, and the fertilizer should be applied once every 7 days or so. Topdressing should master the principle of "small amount and many times" to avoid waste caused by excessive application of fertilizer at one time, or root burning caused by excessive concentration. Pay attention to balanced fertilization, increase the amount of phosphorus and potassium fertilizer, in order to improve the resistance of plants. picture Pest control Plant pest control in shed culture is basically the same as that in open culture. It mainly focuses on prevention, adopts comprehensive cultivation technology, attaches importance to crop rotation, does a good job in temperature and humidity management in the shed, deeply tilts kang culm, cleans the garden, and handles the seeds well. picture Growth regulation As the temperature increases gradually, the temperature difference between day and night becomes smaller, vegetable plants are prone to barren growth, especially jacket and melon vegetables. Once the plants grow, easy to cause falling flowers and fruit, even if the seating fruit is also prone to appear hollow fruit and other misshapen fruit. |
