In winter greenhouse vegetable production, vegetable farmers do not ventilate as often as in spring and summer, because it is extremely unfavorable for vegetable growth in cold and humid conditions.
When watering vegetables, drip irrigation is used inside the ground film, and flooding is not recommended. Since the surface water in the greenhouse evaporates less in winter, the temperature is low, the crops grow slowly, and the water demand is less, as long as the crops can grow normally, they do not need to be watered as long as they are watered enough. If watering is required, it should be done on a sunny morning, and it is best to properly prevent wind and moisture after watering. In addition, you can also place some straw or something like that on the sidewalk boards in the greenhouse, which can absorb moisture.
In winter, if the greenhouse is sealed for a long time and the humidity is high, it will not only slow down the growth of vegetables, but also cause diseases such as gray mold, downy mildew, and blight. Once a disease occurs, it is recommended that vegetable farmers do not use the conventional spraying method in spring and summer to avoid negative effects.
When preventing and controlling diseases, it is recommended to use aerosols and dusts to prevent and control vegetables. Sprays will increase humidity and have a bad effect on crops, so try to avoid them.
- Deep ditch and high ridge cultivation
That is, when planting in a greenhouse, it is advisable to choose a plot with high terrain and convenient drainage. When preparing the land, it is necessary to open drainage ditches around the greenhouse. The greenhouse adopts deep ditch and high ridge cultivation method, and the ridge height is 30 cm to filter water and drain water.
- Use drip-free film or drip-proof agent for greenhouse film
That is, the greenhouse film is treated with drip-free film or drip-proof agent to prevent "raining" in the greenhouse. The drip-proof agent is a kind of agent. When sprayed on the film, it has the function of drip-free film.
- Ground full film covering method
That is, the ridge surface and the ditch are covered with film. This method can reduce humidity by 20-30%.
- Natural ventilation method
That is, on the premise of ensuring that the seedlings are not frozen, ventilate as much as possible to remove moisture. Or use thermal insulation curtains and electric film rollers to pull up for automatic ventilation. Using greenhouse intelligent control system, based on Juying Agricultural Cloud Platform, various sensors are used to remotely detect the air temperature and humidity, soil moisture, soil humidity, soil fertility, soil PH and other data of the agricultural product growth environment in real time. Guided by the crop cultivation process, the cloud platform edge computing is used to realize automatic irrigation, automatic rolling curtain, automatic spraying, automatic fertilization, and automatic spraying, so that crops are always kept in a suitable growth environment. The cloud platform automatically performs data storage and analysis, provides data services for the improvement of crop cultivation technology, promotes the quality and safety upgrade of agricultural products, and helps farmers increase their income.
- Waterless pesticide application method for pest control
That is, the use of medicinal soil and fumigation method to prevent and control pests and diseases. It can effectively prevent and control pests and diseases, and control soil humidity and air humidity.