Four difficult problems of full crown transplantation

Rapid seedling raising by root control is a new seedling raising method with the control of plant root growth as the core. It is composed of unique design principle of root-controlled seedling container, scientific formula of special seedling substrate and auxiliary root-controlled cultivation management technology. The seedling raising period is shortened by about 50%, the later management workload is reduced by 50%-70%, and the total number of lateral roots of plants is increased by 20-30 times compared with conventional seedling raising, which completely solves the problem that big seedlings are difficult to transplant in four seasons, and is known as "movable forest".

Since 1980s, this technology has been widely used in Australia, New Zealand, Europe, America, Japan and other countries and regions. In 1990s, the scientific and technical personnel of China Academy of Sciences and Forestry System improved the product to adapt to the seedling raising technology in China.

1, technical problems of full crown transplantation of large saplings

Conventional green seedlings must be cut off, otherwise it is difficult to survive. The technology of rapid seedling raising by root control adopts special seedling raising container to control the growth of main root system, promote the rapid growth of capillary root and form thick, short and developed fibrous root system. The root system is developed and the trees grow vigorously. When transplanting, there is no need to behead, prune and pick leaves, and it is completely possible to transplant large seedlings in full crown, which is known as a movable forest.

2. Technical problems of survival rate

The specially designed root control container not only has good air permeability, but also has the unique effect of preventing root rot and root entanglement. In addition, due to the dual functions of the special substrate for root control, the water and fertilizer conditions required by the seedlings are well controlled, the root control container is easy to disassemble during transplanting, the root is not damaged, the transplanting survival rate can reach 100%, and the later management cost can be reduced by 50-70%.

3. Technical problems of transplanting in four seasons.

The seedlings cultivated by this technology have no seedlings, no root damage and no water loss, and the detachable root control container is easier to transport and carry for a long time, saving convenience, transplanting in all seasons and having high survival rate.

4. Solve the technical problem of rapid orchard renewal.

Orchard renewal will take at least 5 years. Using root control seedling raising technology can raise seedlings in open space. In 2-3 years, the ground diameter of seedlings can reach about 4 cm, and the crown width can reach more than 1m, and a small amount of flowers can begin to bear fruit. When transplanting, roots are not damaged and seedlings are not changed, and a large number of fruits are produced in the next year. This can not only ensure that the income of fruit farmers will not decrease during the orchard renewal period, but also ensure the purity of seedling varieties.

The design and manufacturing technology of root-controlled rapid seedling container was invented by Australian experts and patented in more than 80 countries (including China). International patent application number: PCT/AU00/01389; +0389; China patent application number: 008 17365.6.