First, choose trees.

Magnolia grandiflora has a magnificent tree shape and a broad conical crown. Plastic surgery is mainly natural.

Second, the plastic pruning technology

1. Pruning of propagation seedlings: After the grafted seedlings of Magnolia grandiflora survive, the rootstock buds should be pulled out in time, and the stems should be drained and pruned in time to keep the trunk straight.

2. Plastic cultivation of large seedlings: If Magnolia grandiflora grows too vigorously, it will often have a double-headed phenomenon, which is also easy to cause top-heaviness, especially after the rain, the upper branches are prone to lodging. When the growth is excessive, the branches and leaves should be thinned in time. Especially if the trunk grows too fast, it is necessary to remove the leaves near the top in time and cut off the side branches near the top appropriately to keep the trunk straight. Because the mixed bud at the top of Magnolia grandiflora is usually a main bud and two secondary buds, the branches are relatively compact, and there are many internal branches and overlapping branches, so attention should be paid to pruning in time. In the process of cultivation, it is necessary to maintain the height of branches year by year. According to the growth potential of seedlings and the balance of overall growth, the lowest branch should be pruned by 1-2 pieces every year, and the suitable height under the branch is about1-1.2m. ..

3. Transplant pruning: Magnolia grandiflora has poor germination ability, so mud balls should be brought when transplanting and pruning. Always thin branches and pick leaves, and avoid short cutting. Cut off pests and diseases, overlapping branches, internal branches and branches that disturb the tree shape, and keep the tree intact. Combined with leaf picking, 1/3- 1/2 leaves can generally be removed. If it is removed too much, it will reduce transpiration tension and make it difficult for roots to absorb water.