Lifting seedlings is an important part of cultivating seedlings. The quality of seedling raising work directly affects the survival rate after seedling planting. When lifting, you should pay attention to the following questions: Nursery standard seedling branches are robust, mature, buds full, roots sound, no pests. Seedling specifications should meet certain requirements, such as Populus tomentosa, Hybrid Yang, Fatong, etc. Seedling breast diameter should be more than 3 cm, seedling height should be more than 3.5 meters; Apple, pear, apricot, peach and other seedlings to more than 1 meter. Try not to use young seedlings, etc. In principle, the raising time should be raised in the dormant period of seedlings. The deciduous tree species can raise seedlings from the beginning of the fall in autumn to the sap flow in the spring of the following year; the evergreen tree species can also be raised in the rainy season in addition to the above time. It is better to start the seedlings in spring before germination of seedlings, and to start seedlings in the autumn after the shoots have stopped growing. When the nursery is raised, the roots should be reduced as far as possible. The main lateral root length of the seedlings should be at least 20 cm long. Care should be taken to prevent damage to the seedling cortex and buds. If the main root and lateral roots are too long for inconvenience, they can be cut off but they should not be cut. Bring soil ball to raise the seedlings when the root should pay attention to bring the earth ball, in order to avoid the root exposed to the air to lose moisture, earth ball diameter is generally 6 to 12 times the diameter. Bare root seedlings should be followed by planting; the precious tree species or large trees can also be wrapped with straw ropes to prevent earth balls from falling; the roots of the nursery stocks that need to be transported long distances must be muddy and transported with plastic film or wet grass bags. Seedling disinfection can be used 3 ~ 5 Baume degrees lime sulfur soaking seedlings for 10 to 20 minutes for sterilization, and then rinse with water. Seedlings grade seedlings classification principle is the need for pure varieties, the same type of rootstock, shoots on the ground full, buds full, with a certain height and thickness, developed roots, more roots, less root cut, no serious diseases and insect pests and mechanical damage, marry interface healing good. Conifer species also need to consider the development of the top bud. Graded seedlings at each level were tied into 20 bundles or 50 strains and 100 strains for statistics, sales, and transportation. Acid-Base Balance,Calcium Gluconate Injection,Finished Pharmaceutical Product,Acid-Base Balance Agent NOUVASANT GROUP LTD. , https://www.nouvasant.com