overgrown treesA clumped tree was a tree with three or more branches. In recent years, clumped seedlings had become popular and were widely used. In addition to real estate, municipal gardens, park landscapes, factory and mine greenery, private courtyards, and so on were all favored.
From the perspective of landscape effects, a single plant may appear monotonous at the landscape node, while a clustered tree is beautiful and elegant. It can change the situation of a single tree species in the past and adapt to the changing aesthetic needs. Therefore, it is widely used in courtyard design, community gardens, and landscape engineering.
For nursery owners, clumped trees could solve the problem of dense planting and temporary inability to sell. Moreover, the planting area was small and saved space. The price was higher than that of a single tree, especially the high-quality clumped seedlings with better tree shapes. Cultivating clustered seedlings could also enrich the variety and adjust the balance of supply and demand in the seedling market, which was conducive to the positive development of the seedling market.
There were three ways to cultivate clumps of seedlings: single seedling cultivation, combination cultivation, and combination cultivation. However, the growth cycle of single-plant and sowed seedlings was long, and many tree species were not suitable for cutting. The survival rate was also a problem, so the current method of cultivating clustered seedlings was to plant them together. However, there were still many problems in the current production of clumps of seedlings, such as the serious assimilation caused by the nursery following the trend, the technology was not mature enough, and the varieties could not meet the market demand. Many clustered seedlings planted in nurseries had problems such as low survival rate, strange shape, and not reaching the quality category, which lowered the quality of the entire clustered tree market. Moreover, the clumped seedlings planted together were too uniform in shape and relatively stiff. Although the branches were elegant, the trunk diameter was too uniform and lacked natural beauty. On the other hand, the high-quality clumped seedlings had to be grand and imposing as a whole. The shape was inverted, the trunk was well-arranged, dense and natural, and the penetrability was good. The trunk at the bottom was close to the original shape, and the branches were elegant.
Seedlings suitable for artificial planting of clumps trees required strong resistance, easy survival, and strong root regeneration ability, such as Camphor, Chinese tallow, pistachia, buerger maple, crape myrtle, Acer palmatum, hackberry, zelkova, red maple, maple, pentagonal maple, white birch, Mongolian oak, crape myrtle, violent martinum, Chinese redbud, white wax, lantern tree, liriodoid tree, Chinese dove tree, etc. Some clumps of trees, such as clumps of hackberry, clumps of Mongolian oak, clumps of cotinus coggygria, clumps of buerger maple, clumps of pentagonal maple, clumps of tea maple, clumps of white birch, etc., each had different ornamental characteristics and suitable environments, and had different applications in the landscape. For example, clumps of hackberry trees had good shade and windproof effects, which were suitable for providing shade in parks, courtyards, and other places; clumps of Mongolian oak trees were excellent autumn leaf trees in Northeast China, which could be used to create windbreak forests, etc.; clumps of cotinus coggygria had round crowns and bright autumn leaves, which were suitable for solitary or cluster planting in courtyards.
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