Winter breeding methods and precautions for Daphne chinensis
Daphne is a winter flowering plant, and its elegant flower shape is often called "Winter Fragrance." Maintenance in cold seasons directly affects flowering effects and plant health. Mastering scientific management methods can effectively enhance ornamental value. This paper systematically analyzes the key points of winter maintenance of Daphne chinensis through five core skills. 1. Environmental control temperature accurately controls the optimal growth temperature of Daphne odora at 10-20℃. Three points need to be paid attention to in the north: ① More than 10cm away from the glass to prevent frostbite; ② Use double insulation film to cover at night; ③ The flowerpot needs to be raised by 3cm in the greenhouse. In Jiangnan areas, heat preservation can be carried out by setting pots, and filling the outer flowerpots with wood chips can improve the heat preservation effect at 3℃. Air circulation management Heating environment requires ventilation three times a week. The "dual-period method" is adopted: windows are opened for 30 minutes from 11:00 to 13:00 noon, and secondary ventilation for 20 minutes from 15:00 to 16:00 in the afternoon. Use transparent plastic film to make temporary wind shields during ventilation to avoid cold wind blowing directly on the blades. 2. Light management In winter, it is necessary to ensure direct light for 4 hours a day. The "light-chasing maintenance method" is adopted: turn the flowerpot 45 degrees every week to receive light evenly. The double-glazed window will filter 50% ultraviolet light. It is recommended to move it to the unobstructed balcony twice a week to fill the light for 2 hours. Pay attention to the temperature transition to avoid excessive temperature differences. 3. The scientific water replenishment plan for water and fertilizer control adopts the "three-finger detection method": watering 3 cm under the topsoil when it is dry. The temperature difference between the water temperature and the environment should be ≤5℃, and 2 drops of white vinegar should be added to adjust the pH value. It is recommended to use an ultrasonic humidifier for humidification. When maintaining 60% humidity, the watering amount can be reduced by 30%. Precision fertilization strategy: 0.1% potassium dihydrogen phosphate can be applied every 15 days before the budding period, and fertilizer can be stopped immediately after flowering. When the temperature is lower than 12℃, switch to foliar spraying method: dilute the fertilizer concentration to 0.05%, and spray it once a week on the back of the leaves. 4. When frostbite occurs during special conditions, it should be immediately moved to an environment of 10 ° C for 3 days, cut off the damaged leaves and apply fungicide. In case of continuous rain, a full-spectrum plant fill light can be used to fill the light for 3 hours a day, preferably 40cm away from the plant.
Through the collaborative management of the three major factors of temperature, light, water and fertilizer, and in conjunction with detailed maintenance techniques, Daphne can not only safely survive the winter, but also extend the flowering period until March of the next year. Regularly observe the condition of the leaves and adjust the maintenance plan in time to allow this "pilgrim in the snow" to bloom longer.