Precautions for winter pruning of plum seedlings
1. Due to the different varieties and individual plant growth conditions, when pruning plum saplings, do not mechanically move a certain tree type, but change a large tree into a small tree. We should prune trees. According to the principle of branch-based modeling, as long as the ventilation and light transmission are good, each main body is the main body. Reasonable allocation of side branches and robust growth can achieve early fruit, high yield, stable yield, and excellent conditions.
2. When cutting long branches (backbone branches, etc.), because the wound cracks in winter, it is not easy to heal, and it is easy to Attracts pathogenic bacteria to colonize, causing rot and glue flow. Therefore, it should be carried out during germination in early spring, and a 2-3 cm long stump should be left on the incision to facilitate wound healing and the germination and branching of the first bud under the incision; It is best to apply lead oil or slime to protect the wound.
3. In the seedling stage and initial fruiting stage of plum saplings, if the branches are cut too heavily, it is easy to cause thick branches, resulting in excessive growth potential and excessive growth; if the cut is too short and light, the lower buds of the pruned branches are not easy Germination, will form the lower part of the bald phenomenon. Therefore, during the shaping stage, young plum trees should be mainly pruned in summer. From June to August, the original branches can be wiped, topped, branched, thinned, etc., and the branches can be rapidly increased within 1 to 2 years to expand the canopy. Make it take shape as soon as possible and produce results as soon as possible.
4. Varieties with low branching ability and strong germination ability, such as black gemstone of plum saplings. For For Australian plum 14, etc., the seedlings should be cut short within 1 to 2 years to promote the growth of branches, increase the number of branches, and make them quickly form. After pruning in the third year, re-pruning should be avoided. The method of slow-release long branches and fruiting branch groups is mainly used to produce as many short fruiting branches as possible, so as to produce more fruits. In the middle and late stages, the contraction is renewed, and the growth and fruiting ability are restored.