Method for culturing large eucalyptus seedlings

Abstract

The invention discloses a method for culturing large eucalyptus seedlings. The method comprises the following technical steps: 1. selection of seedling field; 2. preparation of a plug seedling bed; 3. preparation and sterilization of matrix soil; 4. selection and treatment of ear rods and tissue culture seedlings; 5. cutting and plug transplantation of the tissue culture seedlings, wherein, the cutting seedlings are vertically inserted in the midpoint of holes at depth of 1.5-2cm; and the tissue culture seedlings are directly transplanted to the prepared plug seedling bed; 6. water and fertilizer management; 7. transplantation in vessels: the seedlings are cultured in the plugs for about 50-70 days, and terminal buds are newly extracted to 2-3cm; when the root systems of most of nursery stocks are lumped, the seedlings in the plugs are transplanted to a black polyethylene plastic nursery cup with 8*8 (cm) for culturing the large seedlings; and 8. culture of the large seedlings: the transplanted young seedlings are placed in a shading arched cover for culture, and a shading net is gradually opened for hardening the seedlings at the later period; water and fertilizer management is strengthened; and then the seedlings are removed out of a seedling nursery and planted in a mountain for afforestation in the case of seedling height up to 35-50cm and ground stems up to more than 0.25cm, fertilization is stopped 10 days before afforestation, and the nursery stocks are applied with transferring fertilizer by 0.3% of complex fertilizer once 1-2 days before outplanting.

Description

technical field [0001] The invention belongs to the technical field of plant asexual rapid propagation and seedling cultivation, and in particular relates to a method for transplanting eucalyptus plugs and transplanting tissue cultured seedlings into large seedlings after the plugs are transplanted. Background technique [0002] Eucalyptus is one of the three famous fast-growing tree species in the world. It is a good raw material and an ideal industrial raw material tree species for papermaking, wood-based panels, and plywood. Eucalyptus planting is generally carried out directly from June to July every year with nutrient bag seedlings and hole planting tube seedlings. This planting method is due to the small size of the seedlings, low degree of lignification, poor resistance to harsh environments, and easy to be attacked by insects. Harm; especially for afforestation on barren hills, the survival rate and preservation rate of afforestation are extremely low. In order to i...

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Problems solved by technology

[0003] The purpose of the present invention is to aim at the shortcomings that the seedlings cultivated by the above-mentioned existing eucalyptus seedling cultivation technology cannot effectively resist diseases, insects, and weeds, analyze and study from the biological physiological angle and the biophysical angle, and provide a kind of eucalyptus that can effectively improve the survival rate of afforestation. Seedling cultivation method, using hole tray cutting seedlings (tissue culture seedling hole tray transplanting), the method of container transplanting to cultivate large seedlings, thereby greatly improving the survival rate and preservation rate of afforestation, and greatly reducing the cost of afforestation

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