What to do about continuous cropping obstacles in greenhouse vegetables? The latest solutions are here

Now, growing vegetables through greenhouse technology allows off-season cultivation of vegetables and can bring greater profits, but many vegetable growers often pursue only immediate high-yield benefits and apply large amounts of chemical fertilizers during cultivation, causing damage to greenhouse soil structure, declining soil fertility, and worsening pests and diseases. So continuous cropping obstacles in greenhouses are becoming increasingly prominent. What should be done about continuous cropping obstacles in greenhouses? Let's take a look together.

I. Causes of continuous cropping obstacles in greenhouses

1. Large pest and disease base

Continuous cropping in greenhouses causes the density and severity of pests and diseases such as leaf mold, gray mold, downy mildew, root rot, Fusarium wilt and aphids to be far higher than in non-continuous cropping greenhouses.

2. Destruction of soil microbial balance

Long-term continuous cropping in greenhouses will change the soil shape, temperature, humidity and light conditions, inhibiting the growth of beneficial microorganisms while favoring the reproduction of harmful microorganisms. This severely destroys the balance of soil microorganisms, not only slowing fertilizer decomposition, but also causing more pests and diseases, becoming more serious year after year.

3. Salinization

Greenhouses are covered with film all year round, which damages the natural water balance. In addition, the temperature inside the greenhouse is relatively low, and evaporation from the soil and plants is high, so salts from deep soil rise, forming salt on the soil surface. This is soil salinization.

II. Prevention and control measures

1. Increase application of organic fertilizer

Applying organic fertilizer can increase the content of soil organic matter and trace elements, improve the soil's granular structure, increase the soil's water- and fertilizer-holding capacity, and also favor the reproduction of beneficial microorganisms.

2. Adjust pH

Long-term continuous cropping of greenhouse vegetables increases salts in the soil, so the soil pH can be adjusted appropriately to bring it close to the slightly acidic or slightly alkaline environment preferred by most crops.

3. Disinfection

After each crop harvest, first ridge the residues, then sprinkle water; after water seeps in, spread disinfectant, then deep plow and seal the greenhouse to increase yield. This can achieve sterilization, insect killing and disinfection.

4. Reasonable crop rotation

Not all crops are suitable for rotation. Rotation should be based on the physiological characteristics of different crops, their similarities and differences in susceptibility to different pests and diseases, and their habits in different environments. For example, choose various crops with high demand for nitrogen, phosphorus and potassium fertilizers for rotation with each other, so that nitrogen, phosphorus and potassium fertilizers in the soil can be fully absorbed by the crops without waste. Crops with deep root systems and shallow root systems can be chosen for rotation, so that nutrients at all levels of the soil can be fully absorbed. Various crops preferring acidity and alkalinity can also be chosen for rotation, so that the soil pH is moderate and creates a good environment for crop growth and development.

  The above is an introduction to what to do about continuous cropping obstacles in greenhouse vegetables. We hope it can help you. To learn more related knowledge, please keep following us.