1. Spring eggplant cultivation fertilizer management
Spring eggplant fertilization management should follow the principles of balanced fertilization and reasonable fertilizer application. The eggplant that will be on the market in spring is now at the end of the fruiting period. At the same time, it also enters the late stage of growth and development. Plants need to increase the amount of fertilizer, and they are prone to defertilization, leading to premature plant failure. Therefore, while appropriately increasing the number of times of watering and the amount of watering, fertilizer should be applied once every 7 days in combination with watering. It is necessary to grasp the principle of a small number of times for topdressing to avoid waste caused by excessive application of chemical fertilizers at one time. Should pay attention to balanced fertilization, moderate increase in phosphorus and potassium fertilizer content. In addition, it is recommended that the majority of vegetable growers use some Kumquat bio-fertilizers, which have the effect of promoting the absorption of various nutrients by plants. In addition, the bacteria in the fertilizer can produce some biological hormones that can stimulate plant growth and improve plant resistance. The low temperature in spring may cause the root activity of the plant to decline, and the ability of sucking fertilizers to weaken. Therefore, it is necessary to use potassium dihydrogen phosphate and a foliar fertilizer mainly composed of trace elements for foliar dressing so that nutrients can be quickly and effectively supplied to meet the growth requirements.
2. Spring Eggplant Plant Moisture Management
In spring, there are many diseases and insect pests in vegetables. We should do a good job of water management, which is good for pest control. Moisture management should follow the right amount of timely principles. Eggplants grown in the greenhouse are generally covered with plastic film. Therefore, pre-irrigation uses under-membrane submerged irrigation to effectively prevent ground water from evaporating. In addition, the reduction of air humidity in the greenhouse can reduce various diseases. After the eggplant grows at a later stage, the temperature can rise and the water can be poured. Watering should be done on a sunny morning because the ground temperature is quickly restored and there is enough time to exclude the moisture in the shed. Before April, the temperature was generally low and the amount of evaporation was small. Therefore, it is not necessary to apply too much irrigation to prevent the occurrence of humidity and the spread of disease. After April, the temperature rose rapidly and the growth of plants was accelerated, and the irrigation volume and times could be appropriately increased. After the greenhouses are watered, the greenhouses are closed for a short period of time to increase the temperature inside the greenhouses. When the temperature rises, ventilation and dehumidification can be performed in time.
3. Spring eggplant plant ventilation management
The temperature rises quickly in spring. The occurrence of relatively large humidity in the shed is more frequent. It is necessary to reduce the humidity in the shed by controlling the ventilation, and to prevent the occurrence of diseases in the shed. The optimum temperature for eggplant during the day is 28 degrees Celsius, and the optimum temperature at night is 14-16 degrees Celsius. If the temperature is too high or too low, the flowering and the result are unfavorable, and it is easy to form a phenomenon of malformed fruit or fallen fruit. When the temperature in the shed rises by more than 30 degrees Celsius, it will start to wind. As the outside temperature gradually increases, the ventilation volume should be gradually increased. In the afternoon, when the outside temperature drops, it is necessary to cover the grasshopper in time to ensure that the temperature in the shed is always maintained within the range suitable for growing vegetables.
4. Egg planting and pest control in spring
Choose disease-resistant varieties, reasonable pruning, timely destroying diseased leaves covered with black agricultural film to prevent the growth of weeds; use insect nets to isolate insect sources, use yellow plates or yellow strips to coat oil to kill aphids, whiteflies and spotted lilies; use silver gray Agricultural film avoids aphids. You can also use frequency vibration type insecticidal lamp to kill Hymenoptera, Plutella xylostella and so on. The main diseases of eggplant in protected areas include eggplant gray mold, eggplant anthracnose, eggplant bacterial leaf spot and so on; the insect pests mainly include thrips, tea astragalus, whitefly, etc., and appropriate chemicals should be selected for spraying according to different diseases. . For details, please contact Beijing Huaxia Kangyuan Technology Co., Ltd. (http://) Telephone Hotline
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