What type of irrigation is most commonly used in greenhouses?

Drip irrigation or subirrigation is the most commonly used type of irrigation in greenhouses due to its efficiency and precision in delivering water directly to the root zone of plants. This method minimizes water wastage, as it allows for targeted application of water, ensuring that plants receive the right amount at the right time. It also reduces the risk of disease by keeping the foliage dry, as water is delivered below the surface or at the base of the plant.

Additionally, drip irrigation can be easily automated and managed, allowing for better control over water application. This is particularly important in greenhouse environments where maintaining optimal moisture levels is crucial for plant health and growth. Subirrigation, which involves watering from below through a capillary action, helps promote robust root development and can further conserve water.

In contrast, other irrigation methods such as surface and flood irrigation tend to apply water over larger areas, which can lead to overwatering and water runoff. Sprinkler irrigation, while versatile, does not provide the same level of water efficiency and control as drip irrigation. Therefore, drip irrigation or subirrigation is favored in greenhouse settings where precision, efficiency, and optimal plant health are key concerns.