Management Technology of Cucumber in greenhouse

1. Do a good job of keeping warm and preventing cold inside and outside the greenhouse.

The most suitable temperature for cucumber hanging fruit is 25-30 ℃ during the day and 13-16 ℃ at night, and the lowest greenhouse temperature should not be lower than 8 ℃, otherwise it will cause cold injury and cause a large number of flowers and fruits and even melon seedlings wilting. Therefore, before the arrival of the cold current, try to add double-layer film around the plastic greenhouse, and add a double-layer grass curtain between the two layers of film facing west and north to prevent cold attack. At the same time, spread a layer of fresh, dry rice and wheat straw in the planting line to increase the ground temperature. In addition, on rainy and snowy days, it is necessary to cover a layer of agricultural film or rain-proof cloth with the same size as the shed surface, so as to prevent rain and snow from soaking the grass curtain and reduce the heat preservation effect. If there are conditions, add 2-3 layers of sunshade net between the two films as far as possible at night, so that the effect of cold protection and warmth is better.

Enhance and adjust the light.

On a sunny day, under the condition that the temperature of the greenhouse will not be lowered too much, the grass curtain and sunshade net will be uncovered early and late to make the plant see as much light as possible. In order to improve the light transmittance of greenhouse film, greenhouse film should be cleaned once a week. In case of rain and snow, we should also draw the grass curtain between the rain and snow at noon, so that the plant can see the light for a short time, not for a few days. In case of continuous long-term overcast and rainy weather, the grass curtain should be opened at intervals so that the plant can gradually see the light. It must not be opened once after the long-term overcast, rainy and snowy weather, and it should be fully exposed. At the same time, it can also significantly improve and increase the lighting conditions in the greenhouse by creating conditions for hanging reflective curtains in autumn and winter.

? 3. Strengthen fertilizer and water management.

Generally consider that the soil moisture in the greenhouse is irrigated every ten days and a half months, around 10:00, and try to adjust the water temperature and ground temperature to a difference of 2: 3 ℃. When irrigation, do not disregard the weather and geography, do not look at moisture, do not flood irrigation according to the size of seedlings, and should adopt furrow irrigation, hole irrigation and drip irrigation under plastic film. In the case of sufficient base fertilizer, there is no need for topdressing in late autumn and winter. When additional fertilizer is really needed according to the growth situation, urea 15~25kg and potassium sulfate per mu can be applied along with irrigation. Every 15-20 days can be combined with spraying, foliar spraying, such as spraying photosynthetic micro-fertilizer or 0.2% mixture of potassium dihydrogen phosphate and urea, etc.