2. Melilotus acuminata is native to Yunnan, Guangxi and western Sichuan, and also distributed in India and Java. It can be propagated by sowing, branching and cutting. Bonsai can be made by digging old piles. In Yunnan, its main producing area, transplanting in autumn and winter has a high survival rate, and even bare root transplantation can survive in 1 month or1month.
3. There are many root injuries during transplanting of Melilotus acuminata, and the main technical points to be mastered in order to improve the survival rate and shorten the slow seedling stage are prolonged.
4. Mark the orientation and remember the planting direction. Under natural conditions, the conditions of light, heat and water in all directions of the tree are different, which leads to the uneven distribution of roots in the trunk and crown, and the tree is more obvious than the seedling. If the original growth orientation is changed during transplanting, there needs to be a transition process after planting, and the growth will be affected. Therefore, before transplanting big trees, we should choose obvious marks on the trunk, especially on the branches in the south for planting in the original position.
5, appropriate pruning and leaf picking, in order not to destroy the backbone branches as the principle, the crown should be reasonably sheared in winter and spring before transplantation. Reduce excessive evaporation of water. When cutting large branches, the cross section should be trimmed to be high in the middle and low around to prevent water accumulation and pre-coated with Bailite wound coating agent. To prevent pests and rot, if there are too many leaves, you should pick out the leaves in moderation.
6. Pay attention to the ways and means of planting trees. Trees can be dug in winter and spring dormancy seasons. Under normal circumstances, the root system should be kept intact to the maximum extent. In principle, the excavation should be started at the proper position in the vertical projection plane of the crown, and the excavation depth should not be too deep or too shallow. Digging obliquely from the outside to the inside makes the bottom of the ditch shape like a pot bottom. Try to avoid hurting small roots and bring soil balls when operating. It should be tied tightly with straw rope during long-distance transportation.
7. Choose a suitable time, and master the principle of planting with the increase or planting in early spring. Pay attention to moisturizing when planting in spring. Planting should be similar to the soil ball of the tree, and at least 80cnm deep bottom should be properly applied with fully decomposed organic fertilizer. Then fill a lot of topsoil to move the big tree according to the original position, and then use a tripod to support and fix the tree while filling the soil and pouring water. Pay attention to master the planting depth and the original tree seal level or slightly deep 2-5cm, the first irrigation should be sufficient. Fill the soil and seal it after the water seeps down. Make a good tree tray and build a small mound around it. After irrigation, the soil ridges will be leveled in the second year after survival to prevent water accumulation in rainy season. After planting, water it according to the weather, rather than waterlogging, and the amount of water should not be too large. After watering, loosen the soil in time to preserve moisture.
8. Rational application of rooting agent and preservative, and treatment with Guoguang rooting agent diluted to 100 times solution can effectively promote rooting. Spray it on the root system before the trees go down to the pond or soak the root system directly for 2 hours, or irrigate it after planting. The survival rate of tree infusion combined with maintenance and management after transplantation is close to 98%.
9. After transplanting, it is necessary to strengthen the maintenance management in the later period. As the saying goes, "Three species are divided into seven branches", so the careful maintenance after transplanting should be regarded as an important link to ensure the survival of transplanting and the healthy growth of trees.
10, Melilotus acuminata likes warm, humid and sunny environment, and has certain cold tolerance. During the growth period, the branches and leaves that are too dense should be thinned in time to increase the ventilation and light transmission inside. Watering should be "dry and thorough", avoiding water accumulation and applying fertilizer frequently. Slight acid soil with good drainage and air permeability should be used when turning over the basin every 2-3 years in spring.
1 1, Melilotus acuminata wood is hard and not easy to rot. In nature, it is easy to form natural relics after being crushed by falling stones, felled by humans and trampled by animals. These natural factors should be used as much as possible when modeling. When cutting the pile material, it should be in place at one time, and the wound should be sealed with paraffin or plant healing agent.
12, Melilotus acuminata has strong germination ability and fast growth rate. Buds can be fixed when the new buds grow to about 30 days, and the redundant branches and buds can be erased according to the needs of modeling. In addition to cutting and storing branches, metal wires can also be used for directional storage. When the length of new branches is 30-50 cm, the wires can be removed in 40-50 days in the peak growth season to avoid "wire trapping" and damage to plants. After removing the metal wire, you can hold up the growing point with bamboo sticks to make it straight and upward, so that the growth speed of the branches is fast and balanced. And pay attention to cut off the redundant buds sprouting on the branches in time to ensure that the nutrients are supplied to the branches needed for modeling.