The Latest Greenhouse Vegetable Growing Techniques and Management Methods Tutorial

A greenhouse is a warm space formed by combining a structure with a greenhouse film, so that heat can be retained through the accumulation of carbon dioxide. When local seasonal temperatures are low, the temperature can be raised to grow vegetables that cannot be grown in that season. Off-season growing is one of the greatest advantages of greenhouse growing, but there are also some disadvantages, such as being prone to fertilizer damage and pesticide damage. Therefore, management must focus on these key points.

I. Cultivation Management

1. Temperature Regulation

In winter, when it is cold, insulation is essential and ventilation is rarely done, but at night the carbon dioxide concentration will rise. Do vegetables still grow best then, or do they still need sufficient oxygen? So on sunny days, the skylights must definitely be opened for ventilation. This will not lower the temperature inside the greenhouse too much. In summer, both ends of the greenhouse can be left open during the day, and closed at night when the temperature drops; if the temperature does not drop, ventilation can continue the whole time. Internal temperature regulation must also be adjusted according to the outside temperature.

2. Humidity

Greenhouses are prone to drought, but excessive humidity in a greenhouse is harmful to vegetable growth. Therefore, do not water too much at one time, because moisture dissipates relatively slowly. It is best to choose drip irrigation, and also remember to choose anti-drip greenhouse film, so that water does not drip onto the vegetables and easily cause diseases, especially some rot diseases and the like. But you also cannot avoid watering, and drip irrigation is the best method.

3. Light Transmission

The greenhouse film should be chosen for relatively good light transmittance. Generally, vegetables all need sufficient sunlight, but sometimes some vegetables can undergo blanching cultivation, such as hotbed chives, which means that after the vegetables have grown for a period of time, they are then subjected to dark treatment, which can make the vegetables softer in texture and better in taste.

II. Points to Note

1. Fertilizer Damage

With long-term drip irrigation in a greenhouse, without rain and without flowing water irrigation, once the growing period becomes long, fertilizers that have not been fully consumed accumulate in the soil, which easily raises the soil concentration, affects root absorption, and prevents the absorption of nutrients and water; it can also damage the roots. The final solution is to change the plot for planting. Rotational planting.

2. Pesticide Damage

Because the space is limited, an effective pesticide method is fumigation and the like, but this easily causes pesticide damage, and pesticide residues in the soil are harmful to vegetable growth. Therefore, it is best to pay attention to the prevention of pests and diseases and use highly toxic pesticides less. Choose protectants and spray as much as possible.

Greenhouse cultivation has advantages and limitations, but as long as the advantages outweigh the disadvantages, it can continue to be used. Moreover, greenhouse production technology will also become more optimized. Relatively speaking, the main management of greenhouse vegetable production is somewhat simpler than that of open-field cultivation.