Old apple tree grafted begonia

In recent years, with the increasing demand for large-size begonia in greening projects, large-size begonia is obviously not enough in greening nurseries, such as Xifu begonia and royal begonia, which are widely used in various places. Apple trees of the same family and genus as begonia are used as rootstocks for grafted begonia. Although the fruit-producing ability of the apple in the orchard has been weak, its tall tree shape and stout branches can play a role in landscaping. The life span of apple trees selected for raw materials is not too long, generally Qiaohua rootstocks can reach 40 years, and dwarfing rootstocks are about 20 years. When choosing apple trees, buy middle-aged and old trees that are about 10 years old, with a maximum of no more than 15 years. In addition, do not choose apple trees with serious diseases and insect pests. Different varieties of apple trees have different affinities to begonia. The common apple tree varieties are Hongxing series, Fuji series and so on. These two have a wide range of affinity, so it is better to use Qiao rootstock. Before grafting, do affinity test on apple and begonia. Because the affinity of each variety is different, try to use good affinity grafting. Apple trees need to be treated with root cutting one year before grafting to promote the germination of new roots. At the same time, a nutrition ditch with a width of 70 cm and a depth of about 30 cm was dug at the broken root and applied to the mixed soil of fermented organic fertilizer, ternary compound fertilizer and fertile soil. In the grafting operation, the large crown should be shrunk one year before apple grafting, leaving a large skeleton to be carried out after one-year-old branches are sent out. There are two kinds of grafting: spring grafting and summer grafting, spring grafting mainly uses skin grafting and split grafting, summer grafting uses T-shaped bud grafting or xylem bud grafting. Before spring grafting, trench under the apple canopy was opened, nitrogen, phosphorus and potassium compound fertilizer was applied to ensure its vigorous growth, and urea and other nitrogen fertilizer could be added after grafting. Apple trees are in a growing period when they pick up in summer, and there is basically no need to topdressing. After grafting, watering according to the dry and wet soil, be careful not to accumulate too much water. There are many and large branches grafted in summer, so it is best to set up support. At the same time, observe frequently and remove the sprouting branches of the apple in time.