Matters needing attention for transplanting large Fraxinus hupehensis trees!
The website tells everyone about the small knowledge of Fraxinus hupehensis, a woody flower, the matters needing attention for transplanting large Fraxinus hupehensis trees, and the following is a detailed introduction.
When transplanting large Fraxinus hupehensis trees in landscape attractions, due to the tree's relatively old age, weak cell regeneration ability, slow recovery of damaged roots, and weak ability to generate new roots, the survival rate of移植 is lower than that of general seedlings, and it is also more difficult to restore the tree's vitality. The following are some precautions I have learned over the years for transplanting Fraxinus hupehensis trees.
First: Improving the soil conditions on site is the foundation for transplanting large Fraxinus hupehensis trees.
In recent years, the transplanting of large Fraxinus hupehensis trees in landscape projects often occurs on the sides of newly built roads or in new parks and green spaces. To level the land, part of the plow layer is completely destroyed, exposing the hard bottom layer of the soil, resulting in soil compaction, poor ventilation and water permeability, slow downward penetration after watering, and long-term saturated soil moisture after repeated watering or continuous rainy days, which加重 the difficulty of root respiration and even leads to anaerobic respiration producing toxic substances harmful to new roots. In some flattened low-lying areas, the soil structure is too loose, with poor water and fertilizer retention, and after watering, the water quickly penetrates or evaporates, causing the roots to be in a state of drought for a long time and grow slowly, or even die. These two types of site conditions have become restrictive factors for the root growth of transplanted large Fraxinus hupehensis trees.
Therefore, to quickly restore the vitality of the trees in compacted soil areas, the diameter of the planting holes is generally 40 to 50 centimeters larger, and the depth should be 10 to 20 centimeters deeper than the height of the soil ball, and the size of the hole should be uniform from top to bottom, in a straight shape, and it is forbidden to dig it into an overly shaped hole.
After the hole is dug, an appropriate amount of fertile surface soil should be filled at the bottom of the planting hole, slightly raised in the middle. The planting depth of the tree is generally such that after the soil settles, the rootstock of the tree is level with the ground surface. When planting, make sure of the position and orientation of the tree, so that the tree is straight in the center of the hole at once. If conditions permit, 2 to 3 water guide ditches should be opened around the planting hole, with cobblestones laid at the bottom for drainage, which significantly promotes survival and restoration of tree vitality.
After transplanting, the compacted soil in the planting hole should be loosened to a depth of 15 to 20 centimeters, and after loosening, straw or other weeds or artificial covering materials such as ceramsite should be covered on the surface of the planting hole.
For the flattened low-lying areas, the soil in the planting hole is too loose, and it can be appropriately pressed in combination with loosening to increase the water retention of the soil. For low-lying areas prone to water accumulation, drainage ditches should be dug to remove excess water in a timely manner.
Second: Careful maintenance is essential
For large Fraxinus hupehensis trees that have been transplanted in landscape attractions, in order to prevent the decline of the tree's vitality, great efforts should be made in maintenance management. Some places, in order to increase the survival rate, often prune the canopy intensively, even cutting off all secondary branches, and some cut the primary branches "cut off the head and tail", leaving only a bare stump. This not only makes it difficult to survive but also, even if it survives barely, it is difficult to form a complete canopy in a short time, eventually leading to semi-dead and lifeless large Fraxinus hupehensis trees in the landscape, lacking vitality, becoming old僵 trees, wasting resources, and not achieving the desired landscape effect. Therefore, for overly pruned large Fraxinus hupehensis trees, the necessary leaf area is the basic material condition for restoring tree vitality. The root system needs to take measures to form a large number of new roots, and the formation of new roots requires sufficient organic nutrition provided by branches and leaves.
To promote new root growth, first, control the water amount; newly transplanted large Fraxinus hupehensis trees have weakened water absorption due to root damage, and the soil should be kept moist, excessive water is not conducive to root growth and can affect soil ventilation, which is not good for root respiration and can even cause root rot. Second, improve soil permeability; while preventing compaction, ventilation holes should be set near the large Fraxinus hupehensis trees to facilitate root germination. The amount of photosynthetic products in newly transplanted and surviving large Fraxinus hupehensis trees depends on the size of the leaf area, so promoting canopy repair and expanding leaf area is a prerequisite for restoring tree vitality. Therefore, it is necessary to effectively protect the new buds of the trees.
The germination of new buds is a sign of physiological activity in large Fraxinus hupehensis trees, and the new buds on the branches and trunks can naturally and effectively stimulate root growth in the underground part. During this period, it is generally not suitable for shaping and pruning, but rather to let it sprout and leaf, and to strengthen protective measures such as watering, shading, and pest control. Shaping and pruning should be done after the large Fraxinus hupehensis trees have fully survived, preferably retaining the branches and leaves to expand the leaf area and provide the necessary organic nutrients for the recovery of the tree's vitality.
Third: Don't underestimate the role of supports
Large Fraxinus hupehensis trees are large in size, so newly planted large Fraxinus hupehensis trees generally have support frames set up after planting, which is an important measure to ensure survival and quickly restore tree vitality. However, in some places, the support points are too low or removed too early, and after a winter of strong wind shaking, combined with the growth of new branches and leaves and the enlargement of the canopy, the supports often become loose. The new root system of transplanted large Fraxinus hupehensis trees is very fragile. Inadequate support technology, or human or mechanical damage, can cause tree trunk shaking, which will inevitably have an adverse effect on root growth and affect root formation. Therefore, it is necessary to check and strengthen the supports in the spring. The triangular support stakes are the most stable, with the upper support point at 2/3 of the tree height, and a protective layer should be added to prevent skin damage, stabilize the trunk, resist wind shaking, and promote the rapid formation of the root system in transplanted large Fraxinus hupehensis trees. This point is often overlooked and should be noted.
The above [] detailed explanation of the matters needing attention for transplanting large Fraxinus hupehensis trees is for everyone's reference and suggestion!