The cutting propagation methods of fruit trees mainly include hard branch breeding and green branch breeding. In recent years, green branch reproduction has gained more and more attention in the production of fruit trees. This is because, in comparison with hardwood breeding (especially for varieties that are not easy to root), cutting propagation with green branches is easy to take root and the survival rate is high; green branch breeding can improve survival. Rate and increase propagation coefficient, and exit the nursery in advance.
The best time for green branch propagation is from July to August. At this point, the cells divide quickly, easy to produce callus, and grow rapidly. Whether it is cuttings or grafting, branches only leave half leaves, which is conducive to normal photosynthesis, reducing transpiration and increasing survival rate. There are two main ways for half-leaf green branch propagation:
Hardwood cuttings are hard to grow and hardwood is easy to transplant and roots are easy to shoot. For example, cherries with green branches and cuttings, the survival rate can reach more than 80%, which can solve the problem of sprouting of hardwood cuttings and no budding.
The method for cutting green branches is: firstly, the soil is required to be leveled, and the ground is required to level impurities. The perlite can be used as a matrix as a condition. The material is not only resistant to earthworms, but also has good air permeability; the cuttings are selected to be semi-woody, stout, and full shoots. The length is 3 to 5 buds, leaving half of the leaves; irrigation after insertion, so that the cuttings and the soil full contact. Humidity is the key to the survival of green branches, requires a relative humidity of 100%, a conditional available automatic gap spray device, and a greenhouse canopy method; arch sheds should be shaded by straw huts, not direct sunlight, so as not to affect the transplanting seedlings The survival rate.
The green branch grafting grafting methods mostly adopt the splicing method, which has high survival rate, rapid growth, and early gardening, and is suitable for fruit trees such as grapes that cannot be budded.
The method of grafting green branches is to use semi-woody branches for scioning, and the length is 2 to 4 buds, leaving half of the leaves; the concrete operation of the concrete connection is connected with hard branches, the difference is to set plastic bags; Put the plastic bag under the interface, use a rope to secure the bag, and then use a needle to tie 2 holes in the bag. This will not only keep the heat and moisture, but also help the healing of the interface without affecting the photosynthesis of the leaves. This is a grafting process. Key; 3 weeks to check the survival rate, and then untie the bag.
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