Seedling nutrient solution infusion
Trunk infusion can be used for mountain seedlings that have not been cut off in advance, large seedlings and scattered seedlings with a height of more than 6m, a tree age of more than 50 years and a DBH of more than 20 cm and weak growth potential. Timely input of nutrient solution is conducive to promoting rooting, germination, strengthening tree vigor, increasing tree survival rate and rejuvenating ancient and famous trees.
However, nutrient solution is not everything. At present, some construction units do not distinguish tree species, do not analyze the causes of delayed germination of trees after planting, or dry branches and leaves and weak trees after germination, and blindly use them. For example, we have seen the phenomenon of infusion of Fraxinus mandshurica, Bauhinia octophylla, cherry blossoms with dry and yellow leaves, Toona sinensis, etc., which seriously damaged the orbital image of Ailanthus altissima ditch, but often failed to achieve the ideal effect.
Seedling nutrient solution perfusion method
Determine the number of medicine bottles according to the DBH of the tree.
(1) Use finished infusion bags. Open the sealing cover, insert the infusion tube into the nutrient solution bag, tighten the seal, lift the liquid bag to exhaust the air in the tube, and insert the needle tube into the borehole to ensure that the nutrient solution does not flow out. Fix the nutrient solution bag on the trunk.
(2) Use the stock solution of the tree hanging needle, shake the stock solution evenly before dilution, dilute the stock solution with pure water according to the instructions, open the cover of the outlet of the empty hanging needle, put the diluted fertilizer solution into the bag, fix the hanging needle on the tree, connect the infusion bag with the infusion tube, exhaust the air in the infusion tube, and insert the other end into the drill L.
(3) When using the infusion bottle, unscrew one of the bottle caps, pierce the seal, replace the stopper, and then screw it into the hole. Unscrew the back cover of the infusion bottle, puncture the seal, screw on the bottle cap and adjust the tightness to control the infusion speed so that the fertilizer solution does not overflow, and it is advisable to finish a bottle within 24 hours.
(4) When preparing nutrient solution by yourself, you can use medical infusion bottles as containers. After punching, select hollow branches of gold and silver wood with the same diameter as L, and insert them 3cm in L to expose 2cm. Insert them firmly so that there is no gap between the branches and the holes. Pull out the needle of the infusion tube with a thin tube, pierce the filter paper in the filter, and insert the needle into the marrow of gold and silver wood. Hang the infusion bottle above the infusion hole above the Im, and control the infusion speed according to the height hanging on the trunk or by adjusting the speed. After transplanting hard-rooted trees, 0.lgABT5 rooting powder can be added to the nutrient solution at the same time.
Seedling nutrient solution infusion times
The number of infusions depends on the tree condition and seedling delay, generally 2~4 times. After the nutrient solution is delivered, fill the bottle with clear water in time, and continue to deliver water 1 bottle every day until the seedlings fully recover their growth.
Matters needing attention in nutrient solution infusion of seedlings
(1) For trees with DBH less than lOcm, try not to lose nutrient solution.
(2) The nutrient solution must be diluted with clear water and can be used now.
(3) The horizontal distribution of wave transmission holes should be uniform, and the vertical distribution should be staggered up and down. Avoid drilling infusion holes on the same horizontal or vertical line. The drilling depth shall not exceed 2/3 of the diameter of the trunk, but it shall not be too shallow, so that the liquid medicine cannot be input.
(4) The conveying speed of nutrient solution should not be too fast, and it is advisable to use 24~30h500mL to avoid a large amount of overflow and loss of nutrient solution. When the loss of nutrient solution is found, the flow of nutrient solution should be properly controlled.
(5) It is forbidden to use nutrient solution in excess concentration and dosage.
(6) The infusion bottle or bag should be hung on the north side of the suitcase as far as possible. When infusion is carried out in high temperature season, the infusion bottle or bag should be covered with a sunshade net to prevent the temperature of the liquid in the bottle from rising and adversely affecting the tree.
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