How to graft elm? What kind of trees are usually grafted?

Elm is a common local tree species. Widely distributed in the Yangtze River basin in northeast, north and northwest China. They are basically cultivated artificially, so people often call them elm, white elm and so on. ?

Elm has the advantages of light tolerance, cold tolerance, adaptation to arid and cold climate, drought tolerance, barren and easy reproduction. This is a popular tree species. Usually used for greening in arid areas, planting street trees and surrounding greening trees. Recently, some netizens asked if elms can be grafted and what trees can be grafted? Let me talk about this problem. Can you graft elm? The answer is that elms can be grafted and propagated whether they are rootstocks or scions.

However, because elm is easy to sow and propagate, and the cost is low, grafting propagation is usually used for large seedlings in production, rather than grafting propagation, because the grafting propagation process is complicated and the cost is high. Seeding and propagation method of elm, because elm seeds are easy to lose germination ability, it is best to pick and sow to improve germination rate; In the north, it is usually harvested in late April, when the samara of elm turns from green to yellow and white, and some fruits fall off. Harvest; No need to treat seeds before sowing; Bottom sowing or field sowing can be carried out, with ditch depth 1 cm, ditch spacing of 20 cm, and covering layer thickness of 0.5-1cm; Sowing amount per mu 10- 15 kg; Water in time after sowing, and seedlings can emerge in 7- 10 days. After emergence, the watering times can be reduced appropriately; Pay attention to arrange time in the process of seedling stage, seedling stage, loosening soil, weeding, fertilization and frequent pruning of lateral branches, so that the trunk can grow upward and keep dry and straight. Generally, the height of annual seedlings can reach 1.5-2 meters. ?

Elm can also be propagated by tillering and pruning, which will not be introduced in detail here. What kind of elms are usually grafted? Here, we don't use grafting to breed elms. Using elm as the rootstock of grafted seedlings can cultivate high-quality green seedlings, such as Ulmus pumila, Ulmus pendula, Ulmus pumila and so on. Because elm is a tree species of Ulmus, it can be grafted with many plants of this genus, but not with trees outside Ulmus. The specifications of elm as rootstock are generally three-year-old elm seedlings, and the thickness of rootstock is more than 2 cm.

Before grafting, cut off the lateral branches of the elm tree to a position higher than the grafting height1.8m. The grafting height is based on excellent greening degree. It depends on the requirements of elm, elm and elm, but usually elm is required to have a good dry shape. The choice of scion is of course the solid branch of elm, weeping elm and long branch elm. Grafting method: Generally, the grafting time is carried out before the sap begins to flow and the buds germinate in spring. ?

In the north, maybe around April. During this period, the temperature became higher, the sap of elm rootstock began to flow, and grafting was easy to heal and survive. There are many grafting methods, including bud grafting, grafting and root grafting. These methods are applicable to the above three methods. Practice has proved that hard grafting has the best effect. The cutting technology of scion and rootstock is conventional budding and grafting technology, and there is no special requirement. Management after grafting is also routine management. Pay attention to germination, soil, fertilizer and water management, weeding and pest control. ?