First, the common sense saplings related to the “saplings†are also referred to simply as nursery stocks. They refer to the seedlings of various fruit seedlings, greening trees, and shrubs that have roots and seedlings. They are cultivated in nurseries, regardless of their age and size, before being sent out. They are called saplings. Types of seedlings: seedlings, vegetative propagation seedlings, grafted seedlings, transplanted seedlings, leave bed seedlings. Saplings are divided into four types: 1. Seedlings: Saplings that are bred with seeds. Saplings that are artificially grown with seeds are called seedlings. Saplings that grow naturally in the wild mother tree are called wild seedlings. The roots of the planting seedlings are well developed, and the seedlings grow neatly, robustly and with good quality. The density of wild seedlings is uneven, differentiation is severe, and roots are underdeveloped. Second, grafted seedlings: seedling-based seedlings, saplings grafted with methods, known as grafted seedlings. Third, the vegetative propagation of seedlings: According to the seedlings used in the material and specific methods can be divided into: 1, cuttings seedlings: dry seedlings or interception of tree branches cut seedlings bred bred. 2, buried seedlings: dry or seedlings with seedlings, the whole section buried in nursery nursery bred saplings. 3. Plugging seedlings: Use the roots of trees or saplings to insert or bury seedlings cultivated in nurseries. 4, root seedlings: also known as Liu root seedlings, is the use of underground roots eruption of new saplings. 5. Beading seedlings: Embed twigs that are not detached from the mother's body in the soil or in the air with moist matter. After the roots are cut, the saplings that are cut off from the mother's body are bred. 6, tissue culture seedlings: the use of maternal tissue or cells in nutrient solution bred saplings. For fruit trees, vegetatively propagated seedlings must be planted, ie: grafted seedlings, cuttings (such as grapes), buried seedlings (such as figs), pressed seedlings (such as hazelnuts), tissue culture seedlings, etc.; seedlings cannot be planted. IV. Transplanting seedlings: All kinds of saplings mentioned above are transplanted into saplings that are transplanted to another seedbed (lot) in nurseries. After planting seedlings or vegetative propagation seedlings in the nursery, the saplings that have been cultivated after transplanting are continued. The transplanted seedlings can increase the area of ​​nutrition, improve the ventilation and light transmission conditions, promote the growth of lateral and fibrous roots, improve the quality, and improve the adaptability to site conditions for afforestation. The key to ensuring the survival of transplanted seedlings is to maintain the balance of water in their bodies. In addition to keeping the soil moist, it is also necessary to protect the roots of the seedlings and prevent water loss.
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