Selected varieties: The selected varieties should be approved by the approval committee above the provincial level and suitable for local cultivation. Some local breeds are affected by geographical location and natural conditions. In other places, the cultivation yield is not high and the quality is also poor. Some of them are in the stage of experimentation and demonstration. There is no approved variety, and only trial planting can be introduced, and large-scale development cannot be carried out blindly.
Recognize the varieties: At present, the nursery stock market is rather confusing, with more than one product, the name of the product being confused with the name of the variety, and even the phenomenon of being in a bad situation is serious. Therefore, attention must be paid when buying seedlings.
Look for the unit: Due to the difference in the level of nursery technology, the quality of seedlings produced by different nurseries differs greatly. When buying fruit seedlings, look at a few more. Generally speaking, the quality and purity of seedlings produced by agricultural technology extension departments, academies of agricultural sciences, and universities and colleges are relatively guaranteed. Even if inferior seedlings are found, they are liable to be held accountable. However, the seedling quality assurance must be signed when purchasing seedlings. Contracts and asking for invoices.
Look at the mother garden: The nursery with higher production levels has a mother garden or a certain number of mother trees. This is the source of the scion for the new species. In addition, it is not possible to buy seedlings grafted with high-risk trees, because of the high risk of viral diseases.
Scientific selection of seedlings: The seedlings must be strictly selected when purchasing seedlings. The main indicators are: seedlings are thick, and the thickness should be more than 1 cm at 20 cm from the rhizome; the full shoots in the plastic belt must reach 6 or more; the roots must be complete, and the lateral roots must be intact. Number 5 or more, length 20 cm or more; seedling height exceeding the height of 20-40 cm; dry skin and stem bark without dry, shrinkage and damage; seedlings grafted with rootstocks with strong resistance and resistance to stress.
Pest and quarantine inspection: In order to prevent the spread of dangerous pests and diseases, quarantine permits, seedlings transport permits, and seedling quality appraisal certificates must be handled when transporting seedlings.
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