Hongfeng: native to the east coast of the United States, mainly from the northern United States and most parts of Canada. It is a deciduous tree. It grows rapidly, with adult tree height 12- 18m and crown width 12m, which can adapt to the growth of various soil types. Flowers bloom in spring and are red. Because of its bright colors and neat crown in autumn, it is widely used in parks, communities and streets. It can be used as both landscaping and street trees, and is deeply loved by people. It is one of the ideal rare tree species introduced to beautify and green urban gardens in recent years. It is also the only colorful tree species that can be used as street trees. So how to prune and plant when planting?

decrease

1) Before planting Acer truncatum seedlings, the root system and crown of seedlings should be trimmed, and splitting, pests and diseases and excessively long roots must be cut off to ensure the original natural posture of Acer truncatum seedlings;

2) If the incision is larger than 2 cm, it must be treated with anti-corrosion;

3) The stem height of street trees should be 3M, and the stem height of American red maple should be more than 2.5M All the side branches below the first branch point should be cut off, and the branches above the branch point should be thinned or chopped as appropriate;

4) Tall deciduous trees, such as American red maple, should maintain the original tree shape and be thinned appropriately. The main branches should be cut short on the buds of strong seedlings, and 1/5- 1/3 branches should be cut off.

5) Evergreen conifers should not be pruned, only branches with diseases and insect pests, dead branches, weak branches, over-dense branches, drooping branches and mechanically worn branches should be pruned;

6) Evergreen broad-leaved trees basically keep the tree shape and shrink the crown. In normal season, the total crown is 1/3-3/5, the main skeleton is reserved, the peripheral branches are cut off, the internal branches are thinned out, and most leaves are removed.

7) The flowering shrubs are mainly sparse old branches, supplemented by short cuts; Hedge and ball pruning must be neat and consistent, straight lines, beautiful shape, smooth incision and good gardening effect;

8) Climbing and creeping vines can cut off dead and long vines, stagger branches and grow branches horizontally;

plant

The planting of Hongfeng in the United States should be "four followers", that is, "digging, transporting, planting and managing". In case of bad weather, measures must be taken to protect trees.

(1) bare-rooted Acer truncatum seedlings must be planted on the same day, otherwise they must be replaced: tall Acer truncatum seedlings must be planted on the upper part of the mountain after terrain transformation;

(2) Orientation and arrangement of Acer truncatum seedlings in the United States. When planting trees, you should choose those with good growth, beautiful posture, full and complete crown and facing the main line of sight; The crown width of solitary trees should be complete; Cluster planting trees will make the crown outward, low in front and high in the back; Lianas should be planted at the bottom of buildings or scaffolding, and branches and vines should be fixed on supports;

(3) Planting depth of Acer truncatum seedlings in America

The planting depth of Acer truncatum seedlings in the United States should ensure that the root system is equal to or slightly higher than the ground after soil subsidence; Bamboo should be 5- 10 cm deeper than the original depth, and the surrounding area should be compact and the soil should be compacted without damage.

(4) packaging, ridging and watering the soil balls

The grounding package must be removed from the bottom to the top. If the soil ball is loose, the bottom package can be cut and not taken out.

When that fil soil reaches 2/3 of the depth of the soil ball, firstly cover the soil for compaction, watering for the first time, and after the wat permeates, the filling soil continues to be parallel to the ground, then watering for the second time, and then filling the planting soil;

(5) The verticality, support and winding of American red maple seedlings.

The trunk or trunk center of gravity of American red maple must be perpendicular to the ground;

Support should be based on stumps (cross support, pole support, triangular support and single column support are all acceptable);

When supporting, it is forbidden to pass the bamboo pile through the soil ball or damage the root plate;

The support height must be controlled at1/2 of the tree height;

The single support must stand on the side of prevailing wind direction, and the binding must be padded with soft objects, which must be firm, neat and beautiful;

The trunk and the first and second branches of Acer truncatum seedlings with a trunk diameter of more than 5CM must be wound around the trunk, and the height of the trunk must be different according to different tree species. It must be tightly wound with soft materials such as straw rope or hemp chips, and it must be firm, neat and beautiful.

(6) The number of Acer truncatum seedlings in the United States. The planting quantity of American red maple seedlings must meet the design requirements; The number of seedlings shall not exceed or decrease by 5%