2. Sweet clover is native to Yunnan, Guangxi and western Sichuan, and also distributed in India and Java. It can be propagated by sowing, branching and cutting. Digging old piles can make bonsai. In its main producing area, Yunnan, the survival rate of transplanting in autumn and winter is high. Even bare root transplantation can survive in 65438+ 10 months or 65438+ 10 months.
3. There are many root injuries when transplanting sweet clover. In order to improve the survival rate and shorten the slow seedling stage, the technical points to be mastered are prolonged.
4. Mark the orientation and remember the planting direction. Under natural conditions, the light, heat and water conditions of trees in all directions are different, which leads to uneven distribution of roots in trunk and crown, and trees are more obvious than seedlings. If the original growth orientation is changed when transplanting, there needs to be a transitional process after planting, and the growth will be affected. Therefore, before transplanting big trees, it is necessary to choose the trunk, especially the branches in the south, with obvious marks for planting in the original position.
5, appropriate pruning and leaf picking, in order not to destroy the main branches as the principle, before transplanting, the crown should be pruned reasonably in winter and spring. Reduce excessive evaporation of water. When pruning large branches, the cross section should be trimmed to be high in the middle and low around to prevent water accumulation, and the wound coating agent should be coated in advance. Prevent pests and rot, and if there are too many leaves, pick out the leaves in moderation.
6. Pay attention to the ways and means of planting trees. You can dig trees during winter and spring dormancy. In general, the root system should be kept intact to the maximum extent. In principle, excavation should be started from an appropriate position in the vertical projection plane of the crown, and the excavation depth should not be too deep or too shallow. Digging obliquely from outside to inside makes the bottom of the ditch look like a pot bottom. Try to avoid hurting small roots and balls with soil when operating. Tie it tightly with straw rope during long-distance transportation.
7. Choose the right 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 tree according to its original position, then support it with a tripod and pour water while filling the soil. Pay attention to master the planting depth and the original tree is sealed flat or slightly 2-5cm deep, and the first irrigation should be sufficient. Fill in 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 ridge will be leveled in the second year after survival to prevent water accumulation in rainy season. After planting, water according to the weather, not waterlogging, and the amount of water should not be too large. Loosen the soil and moisturize in time after watering.
8. Rational application of rooting agent and preservative, diluted with Guoguang rooting agent into 100 times solution can effectively promote rooting. Spray it on the root system before the trees go into the pool or soak the root system directly for 2 hours, or water it after planting. The survival rate of tree infusion combined with post-transplant maintenance management is close to 98%.
9. After transplanting, it is necessary to strengthen the later maintenance management. As the saying goes, "there are seven branches in three species", so careful maintenance after transplanting should be regarded as an important link to ensure the survival of transplanting and the healthy growth of trees.
10, sweet clover likes warm, humid and sunny environment and has certain cold tolerance. During the growing period, too dense branches and leaves should be drained in time to increase internal ventilation and light transmission. Water should be "dry thoroughly" to avoid water accumulation and fertilize frequently. Slight acidic soil with good drainage and air permeability should be selected when turning pots every 2-3 years in spring.
1 1. Sweet clover wood is hard and not perishable. In nature, it is easy to form natural relics after being crushed by falling rocks, cut down by humans and trampled by animals. These natural factors should be used as much as possible when modeling. When cutting pile material, it should be in place at one time, and the wound should be closed with paraffin or plant healing agent.
12, sweet clover has strong germination ability and fast growth rate. When the new bud grows to about 30 days, the bud can be fixed, and the extra branches and buds can be erased according to the modeling needs. Metal wire can be used for directional storage besides cutting storage branches. When the new branches are 30-50 cm long, the iron wire can be pulled out within 40-50 days at the peak of growth to avoid "barbed wire" and damage to plants. After removing the metal wire, you can use bamboo sticks to hold the growing point straight up, so that the growth speed of branches is fast and balanced. And pay attention to cut off the extra buds sprouting on the branches in time to ensure that the branches needed for modeling get nutrient supply.