At present, "Lingqiu" has already passed, but the bad weather such as high temperature, rainy weather and strong sunshine will continue in our province. This will impose higher requirements on the management of vegetable production. In order to ensure the quality and safety of autumn vegetables and production efficiency, the adverse weather effects of severe weather will be reduced. , put forward the following technical management advice:
First, grasp the open field vegetable field management
At present, open vegetables such as Chinese cabbage, radish, scallion, etc. in our province have gradually entered the sowing and field management period. On the basis of high ridge cultivation, watering and fertilizing should be reasonably performed in accordance with the needs of the crop during the growing stage. Always pay attention to meteorological changes. Do not water before rain. After the rain, remove the water in the field in time to avoid damage. At the same time, we must timely cultivator and weed control to prevent soil compaction, maintain soil permeability, and promote vegetable root development. Based on the application of basal fertilizer, it is necessary to supplement chemical fertilizers in time according to the types of vegetables and the needs of different growth periods. Nitrogen, phosphorus and potassium should be used in conjunction with the application.
Second, do a good job of facilities vegetable production
Summer and autumn vegetables seedlings should be strengthened management, nursery facilities should cover the shade nets, to create a suitable temperature and humidity environment for vegetable seedlings, to prevent seedlings leggy, cultivate excellent vegetable seedlings. During the high temperature period, facilities should increase ventilation and reduce the temperature, cut off the old branches and diseased branches in time, and improve the ventilation and light transmission conditions. In the facility, it is necessary to promote the use of key technologies such as isolation of pest control nets and trapping of yellow boards, use of pest control nets to block external insects from entering the greenhouse to spread germs, yellow planks to trap insects such as grasshoppers and whitefly in the greenhouse, and reduce the density of insect populations. .
Third, scientifically control pests and diseases
Summer and autumn are high incidence of vegetable diseases and insect pests, and also the peak period of pesticide use. We must adhere to the principle of “prevention first, comprehensive prevention and control†and use agricultural prevention, physical prevention, and chemical control measures to prevent and control pests and diseases.
Fourth, scientifically respond to severe weather
After heavy rain, we must strengthen the management of vegetables. The first is to rule out the accumulation of water in the field. After the soil in the vegetable field is slightly dried, timely cultivating and loosening the soil on the surface of the crop to prevent soil compaction, increase soil permeability, and promote root growth and development; second, strengthen fertilizer and water management. After the vegetables are flooded, the soil nutrients will be easily lost. Appropriate amount of nitrogen, phosphorus, potash and other compound micronutrients should be supplemented in time. The extra-root fertilizer can also be applied. Potassium dihydrogen phosphate or other compound micronutrients can be sprayed on the leaves to prevent premature plant failure. The third is to prevent the spread of diseases. After the rainstorm exposed vegetables should be sprayed in time to prevent fungal and bacterial diseases of the agent, to prevent the invasion of pathogenic bacteria from the wound, while maintaining the clean garden, timely removal of field weeds, diseased plants; Fourth, timely planting and replanting. For the severely-damaged plots, the rural areas must be cleared in time, finely-prepared after disinfection, and cropping and replanting should be carried out.
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