Stratification is a method to relieve seed dormancy, that is, burying seeds in wet sand at 1 ~ 10℃ and treating them at low temperature for 1 ~ 3 months can effectively relieve seed dormancy. During stratification treatment, ABA (abscisic acid) content in seeds decreased, while GA (gibberellin) and CTK (cytokinin) content increased.
Li miao is generally grafted with apricot seedlings, that is, apricot tree seedlings first breeds with apricot kernels, and then grafts li miao one year later. Apricots can be sown directly in autumn, seeds need not be treated, and spring sowing must be stored in sand 3 months before sowing.
breeding method
1, grafting
Commonly used rootstocks are peaches and Chinese plums. As a rootstock, peach has strong affinity, fast growth, early fruiting, drought tolerance, large and sweet fruit, but not moisture tolerance, prone to root cancer and gummosis, premature aging and short life. Plum rootstock is suitable for wet areas, with high grafting survival rate, long life, fat and high yield, but the fruit is not as big as peach rootstock.
Scions are harvested from high-quality and high-yield mother trees. Annual branches with complete growth and development in the middle and upper part of the crown are selected, and the survival rate is generally high when grafting is collected. Branches pruned in winter can also be stored as scions. Grafting can be bud grafting or cutting. Bud grafting is carried out in June-August and cutting is carried out in June-February.
Step 2 cut
Annual cuttings are easy to take root and become seedlings. In addition, it is easy to survive in winter by digging root segments with a diameter of 7-8mm for cutting.
3. Lamian Noodles
Rhizosphere sprout can be used for plant propagation. Soil is usually piled up in the rhizosphere to promote the formation of adventitious buds on horizontal roots. After budding, the root tiller seedlings were separated from the mother plant in the second year and became independent seedlings for transplantation.
References:
Plum (Prunus of Rosaceae) _ Baidu Encyclopedia
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