Cuttage seedlings, simple and convenient, fast seedlings, and can make the seedlings maintain the good characteristics of the mother plant, but to ensure its survival rate, we must pay attention to the following points: First, the correct choice of cutting matrix. The cutting matrix must be selected to have good permeation properties and contain no unripe organic matter, pests and bacteria. Commonly used are sand, vermiculite, perlite, soft mountain soil or pastoral soil. Second, the correct choice of cuttings. Cuttings should be selected on mature trees with excellent varieties, robust growth, and no pests and diseases. It requires short internodes, full axillary buds, stout foliage, no pests and diseases. Third, determine the reasonable mining time. The mining strips are mostly carried out during the dormant period of flowers and trees, and the leaves are best when they just fall off. Therefore, the nutrients in the shoots have not yet fallen to the roots, and the nutrients in the shoots are the most abundant, which is conducive to rooting and survival. Fourth, cuttings processing technology. The scissor used for scion cutting should be disinfected, and the knife edge should be sharp. The purpose is to make the cut of cuttings smooth and less harmful to the pests. After harvesting shoots, they must be immediately processed. First, cut off the parts of the base that are not sufficiently developed in shoots or shoots, and then proceed to pass the qualified shoots from the thick end. Press the "rough bar is slightly shorter, the fine bar is longer, and the rooting tree is easy to grow. Slightly shorter, the longer the harder root species, the shorter the cuttings of the clay, the longer the "longer" cuttings of the sandy land, cut into 10-20 cm long cuttings. The cuttings on the cuttings are cut approximately 1-1.5 cm above the buds; the shears are cut obliquely, showing a horseshoe shape. Fifth, reminder root processing. 15-20 days before cutting, the cuttings shall be soaked for 1-2 days. After sufficient water absorption, the bundles shall be placed on a hotbed or a fire pit to maintain the lower part of the cutting. The humidity shall be between 25-30 degrees and the upper temperature shall be less than 10 degrees. Rooting treatment, the current incision to form the callus, and when there is a small root dew, you can remove the cuttings. For tree species that are more difficult to root, growth regulators are used. Commonly used regulators include indole acetic acid, subacids, and naphthalene acetic acid, and they are formulated into a 500-2000 mg/l solution, which is immersed in the lower end of the cuttings for 5 seconds and then inserted. Six, cutting and inserting management. After plugging, it should be irrigated and the moisture content of the cutting substrate should reach 50%. After the formation of the callus in half month, the amount of watering should be gradually reduced to facilitate hair rooting. The air humidity required for cutting seedlings is relatively large, generally 60 More than % is suitable. In order to achieve this goal, it is necessary to moisturize the insertion bed, and when the callus and new roots occur, respiration is enhanced. There is more oxygen demand. Therefore, one or two air changes should be performed every day for 1-2 hours. The rooting temperature of the seedlings is generally 15-20 degrees, and the temperature of the substrate is preferably slightly higher than the temperature of about 4 degrees. This is beneficial to The healing, rooting and germination of the cuttings are improved so as to increase the survival rate of the seedlings.
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