Irrigation technology of garden trees
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The newly planted seedlings should be given a time keeping water to accelerate the close contact between the soil and the root system. In May and June, the temperature increased and plants grew more and more vigorously. In some areas in the north, there are prone to droughts in early spring and less wind and rain. In order to promote the sprouting of trees, flowering, growth of new shoots, and improvement of fruit set rate, the need for trees to meet water needs to be met in time. In the saline-alkali area, irrigation after early spring irrigation can also play the role of alkali pressure.
The hot and dry weather in July and August is the rapid growth period of most trees. There is a large amount of evaporation on the ground in the north, and new trees must be frequently watered. The amount of irrigation water should be sufficient to fill and fill, avoid the topsoil wet and the subsoil is still dry. Trees that have reached the age of majority should be watered to a depth of 80 to 100 cm. The appropriate amount of irrigation is generally based on reaching 60% to 80% of the maximum soil water holding capacity. Before entering the winter, the northern region is cold and windy. It is necessary to fill the frozen water once to protect the trees from frost damage and shoots.
The number of irrigations throughout the year should be specifically analyzed and the number of irrigations in different regions is different. In general, irrigation should be conducted 8 times a year, and from March to November each time. Dry years and areas with poor soil quality should increase the number of irrigations. The correct irrigation method can make the water evenly distributed, save water, reduce soil erosion, maintain a good structure of the soil, and give full play to the water efficiency. Furrow irrigation is to open the ditch between planting lines and divert irrigation. This method saves labor and labor, but it is more water-consuming. Dish irrigation is the irrigation of water into tree trays. This method is suitable for street trees, saves water, and has a low cost. Sprinkler irrigation uses piped water for "artificial rainfall" and is suitable for large-scale green lawns.
The water source for watering is preferably river water, and pool water, stream water, well water, and tap water are all acceptable. In cities, care must be taken not to use the waste water discharged from the factory because these waste waters often contain chemicals that are toxic to the plants. Before the irrigation, the soil should be loosened, and the soil should not be compacted to facilitate the penetration of moisture. After the soil surface is slightly dry, it should be covered with fine dry soil or cultivating loose soil in time to reduce the evaporation of water. In July and August, the weather is hot and should be watered in the morning and evening. Due to the high temperature at noon, a cold water irrigation, the sudden drop in soil temperature, will cause root water absorption difficulties, causing physiological drought.