Doing good winter management to ensure high quality and high yield of strawberries
In winter, only by managing the strawberry in the greenhouse can we ensure that the strawberry can reach high quality, high yield and high efficiency. Specifically do the following:
Shed temperature management During the strawberry flowering and growth period, the temperature in the greenhouse is maintained at 25 ° C during the day and above 5 ° C at night, which is conducive to flowering, fruit growth and maturity. During the harvest, do not exceed 25 ° C during the day, and maintain 3 ° C ~ 5 ° C at night. When the temperature drops below 0 ℃, a layer of middle and small bow shed film should be covered in the greenhouse to protect it from freezing damage.
Controlling the humidity in the shed and strengthening the ventilation and ventilation humidity have a great effect on strawberry flowering and pollination. The humidity in the shed is too high or too low, and the strawberry anthers have a low rate of prescribing, resulting in poor pollination and easy to produce deformed fruits. Therefore, the relative humidity of the strawberry greenhouse should be kept as high as 50% ~ 60% after flowering. When it is too dry, it should be irrigated. If the humidity is too high, it should be ventilated to reduce the humidity in the greenhouse.
Plant management strawberry growth period, each strawberry leaves 8 to 10 leaves, old leaves, residual leaves, diseased leaves and staphylococcus stalks should be removed in time to ensure nutrient supply, and strawberry flowers and fruits should be properly thinned. In addition, thinning stalks, small flowers, non-hypertrophic or malformed fruits and diseased fruits and diseases, promote uniform and neat fruit types, and market in the morning.
Additional fertilizer should be added in time after harvesting a batch of fruit. The amount of fertilizer should be 5-6 kg of nitrogen, phosphorus and potassium compound fertilizer per standard shed, or 0.2% potassium dihydrogen phosphate solution sprayed on the surface, every 5 ～ 7 to 7 days of continuous spraying, fertilization can be combined with irrigation or watering.
Strengthening the prevention and control of plant diseases and insect pests Strawberry diseases in the greenhouse are mainly gray mold and powdery mildew. For the prevention and control of gray mold, ventilation should be strengthened to reduce the humidity in the shed. It can be controlled with 50% Sukeling 1000 times solution, and it can also be controlled with "Yunxunling" fumigant. Powdery mildew should be sprayed in the early stage of disease onset , Can be used 40% Fuxing 5000 times liquid or 15% powder rust Ning 1000 times liquid spray control.
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