How to manage strawberries in greenhouse in winter

Do a good job of keeping warm and cold, strictly control the temperature to prevent it from being too low or too high. The methods of covering the shed with grass, heating the coal stove and smoking around can be adopted; the humidity should be controlled at about 40%, and attention should be paid to ventilation and humidity reduction after watering; dust on the greenhouse film can be cleaned regularly, and plant supplementary lights can be used to supplement light and strengthen the light.

How to manage strawberries in greenhouse in winter

1. Do a good job of keeping warm and preventing cold

Recently, the temperature dropped sharply. Although strawberries have strong adaptability to temperature, freezing injury will occur when the temperature is below-7 ℃. If the temperature is below-10 ℃, the plants will freeze to death directly. Therefore, we must do a good job of anti-freezing measures, you can refer to the following methods.

Grass mulch covers the shed

Because the grass carp is a poor conductor of heat, it can reduce the heat loss in the shed and avoid the temperature drop. Therefore, you can use straw, corn, wheat straw and other crop straw, beat into straw, as long as there is no sun to cover the greenhouse.

Note: when you see the sun, remove the grass in time. Before the cold spell is approaching, adding straw or corn stalk around the shed at night can increase the greenhouse temperature by 2 ℃-3 ℃. When the temperature drops suddenly, you can cover the grass grass with a layer of ordinary agricultural film or old film, which can not only improve the heat preservation of grass grass, but also prevent rain and snow from getting wet.

Coal furnace heating

Five coal stoves per mu were placed in the strawberry greenhouse to heat up the fire, starting from 6pm to 6am, and repeated in the next few days.

Note: the temperature in the greenhouse rises rapidly in this heating method, so the thermometer must be hung in the greenhouse, pay attention to the change of the greenhouse temperature, and the heating can be suspended when the greenhouse temperature reaches about 20 degrees. In order to prevent the effect of gas on strawberries during heating, exhaust chimneys should be added to the coal stove to ensure that the gas is discharged outside the shed or smokeless charcoal is used.

Fumigation around

Before the cold spell comes, crop straw, firewood and grass are lit around the greenhouse, and the smoke produced is used to drive out the cold, so as to raise the temperature around the greenhouse, so as to ensure the increase of temperature in the greenhouse and achieve the purpose of resisting the cold current.

In addition, when the temperature drops below 0 ℃, the greenhouse can be covered with a middle greenhouse and a small bow greenhouse film to protect against freezing damage. Pouring frozen water and spraying sea elves biological stimulant + high purity phosphorus and potassium source pool before the cold wave can play a good role in heat preservation and anti-freezing.

2. Humidity management

The humidity in the greenhouse is closely related to the temperature. when the temperature is low, the relative humidity is high, and when the temperature is high, the relative humidity is small, especially when flowering, the suitable relative humidity is 40%. Too high and too low will affect the quality of pollination.

Humidity control measures

The high-quality non-drip greenhouse film is selected for ●. When the temperature in the greenhouse is higher than 10 ℃ during the day, the film should be properly removed to reduce humidity, and it should be sealed at night.

● uncovers early in sunny days and early in cloudy days.

The ● border and furrow are covered with black plastic film, which helps to maintain the humidity of the soil layer and reduce the humidity in the greenhouse.

Attention should be paid to ventilation and humidity reduction after ● watering.

3. Lighting management

Lack of light in winter will hinder the growth and development of strawberries. In the long run, strawberries will slow growth, slow fruit expansion, poor coloring, more abnormal fruits and so on.

Supplementary light measure

Regular cleaning of the dust on the greenhouse film and timely cleaning of the snow on the greenhouse film after snow can enhance the light and improve the greenhouse temperature at the same time. After late November, plant supplementary lights can be used to replenish light every morning and evening to ensure that the daily light can reach 12 Mel 15 hours during the strawberry flowering and fruiting period.