The principles of plant physiology, biochemistry and ecology are the theoretical basis for transplanting large trees. In practice, the following two principles have direct guiding significance.
1. Approximate habitat theory The ecological environment of trees is a relatively comprehensive factor, mainly referring to microclimates and soil conditions such as light, gas and heat. The transplanted habitat is superior to the original habitat, and the success rate of transplanting is higher. However, some large trees growing in high mountains move into the ground or some trees growing in acid soil move into the alkaline areas. Because of their large ecological differences, the success rate is low.
2. Tree-trend balance principle Tree-trend balance refers to the balance between the above-ground and under-ground parts of trees. The transplanting of large trees has damaged the roots of the tree. Therefore, the upper part of the tree must be pruned according to the root survival of the tree species so that the tree potential in the upper and lower parts of the tree can be balanced.
3. The large diameter trees commonly referred to as DBH, tree age, and stress resistance are those with a DBH of about 15 cm and are in a period of vigorous growth. These trees are very malleable and can recover in the short term. Transplanting trees are generally selected in autumn and early spring. At this time, the phloem of the trunk of a large tree has accumulated a lot of nutrients. When the roots and leaves of trees are damaged due to transplanting, the body relies on the nutrient accumulated in the phloem of the trunk to restore the reconstruction of the roots and branches.
1. Approximate habitat theory The ecological environment of trees is a relatively comprehensive factor, mainly referring to microclimates and soil conditions such as light, gas and heat. The transplanted habitat is superior to the original habitat, and the success rate of transplanting is higher. However, some large trees growing in high mountains move into the ground or some trees growing in acid soil move into the alkaline areas. Because of their large ecological differences, the success rate is low.
2. Tree-trend balance principle Tree-trend balance refers to the balance between the above-ground and under-ground parts of trees. The transplanting of large trees has damaged the roots of the tree. Therefore, the upper part of the tree must be pruned according to the root survival of the tree species so that the tree potential in the upper and lower parts of the tree can be balanced.
3. The large diameter trees commonly referred to as DBH, tree age, and stress resistance are those with a DBH of about 15 cm and are in a period of vigorous growth. These trees are very malleable and can recover in the short term. Transplanting trees are generally selected in autumn and early spring. At this time, the phloem of the trunk of a large tree has accumulated a lot of nutrients. When the roots and leaves of trees are damaged due to transplanting, the body relies on the nutrient accumulated in the phloem of the trunk to restore the reconstruction of the roots and branches.
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