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Irrigation technology of garden trees
After planting garden trees, it's essential to water them thoroughly to meet their hydration needs. This helps the branches grow and flowers bloom, enhancing both the ornamental value and the greenery effect. Newly planted seedlings especially require consistent watering to ensure the soil and root system make proper contact.
In May and June, as temperatures rise and plants become more active, adequate watering becomes crucial. In some northern regions, early spring can be dry with little rain or wind, making timely irrigation even more important. Watering during this period supports tree sprouting, flowering, new shoot growth, and improves fruit set rates. In saline-alkali areas, irrigation after early spring also helps reduce soil salinity.
July and August bring hot, dry weather, which is a critical growth period for most trees. With high evaporation rates in the north, newly planted trees need frequent watering. The irrigation should be deep enough to moisten the soil to a depth of 80–100 cm for mature trees. A good rule of thumb is to irrigate until the soil reaches 60–80% of its maximum water-holding capacity. Before winter, when cold winds hit the north, a final watering is needed to protect trees from frost damage.
Throughout the year, the number of irrigations varies by region and climate. On average, eight irrigations per year are recommended, typically from March to November. In dry years or areas with poor soil, more frequent watering may be necessary. Proper irrigation methods help distribute water evenly, conserve water, reduce soil erosion, and maintain good soil structure.
Furrow irrigation involves digging ditches between rows and directing water through them. It’s labor-efficient but uses more water. Basin irrigation fills water around the base of the tree, ideal for street trees, and is more water-efficient. Sprinkler irrigation mimics natural rainfall and is best suited for large lawns and open green spaces.
The best water source for irrigation is river water, but well water, tap water, or stream water are also acceptable. In urban areas, avoid using industrial wastewater, as it often contains harmful chemicals. Before watering, loosen the soil to prevent compaction and allow better moisture penetration. Once the surface dries slightly, cover it with fine soil or cultivate it to reduce evaporation.
During the hot summer months, water trees in the early morning or late evening. Avoid watering at noon, as the sudden drop in temperature can stress the roots and cause physiological drought. Proper timing and technique are key to maintaining healthy, thriving trees.