Lagerstroemia cuttage seedling raising technology

First, the nursery selection of crape myrtle is suitable for deep in the soil, loose soil, leeward sunny sandy soil cuttings, especially hi rich humus calcareous soil. Before the cuttings, the soil shall be sterilized by spraying a 2-3% aqueous solution of ferrous sulfate on the surface of the bed for 5 days before cutting, and 5 kg of liquid medicine per square meter; it may also be used 40 days before cutting. The % solution of formalin was diluted 400-fold and sprayed on the bed surface to a depth of 3-5 cm and covered with a plastic film.

Second, the cutting technique Crapegrass hardwood cuttings should be in late March to early April. Twig cuttings are mostly in the middle of June in the summer and are accompanied by mining. Collecting cuttings are generally dormant after the fall from autumn to spring before the sap flow in the spring, combined with the winter shear of the tree, select one year strong, full lignification, no pests and branches. Hardwood cuttings in spring need to be stored in winter. The method is to cut the branches into about 15 centimeters, choose a high topography, and dig a ditch with a well-drained shady area, with a groove width of 1 cm and a depth of 60 to 80 cm. Firstly lay a layer of 5cm thick wet sand on the bottom of the trench. Place each bundle of 50 cuttings into layers and place them in the trenches. When the main cutting strip is placed at a distance of 20 cm from the ground, it shall be filled with wet sand and the soil shall be ridged. A grassy handle is inserted in the middle to facilitate ventilation. In order to improve the survival rate of cuttings, water-soaking cutting inserts should be applied 6-8 days before cutting. If stagnant water is used, water must be changed every day. Cuttings were performed when there was a significantly irregular nodule at the lower incision. Can also be soaked in 1% sucrose solution for 24 hours, can significantly improve the survival rate. Fine preparation before cutting, apply enough basal fertilizer to loosen the soil and have sufficient moisture. First use the tool to open the hole, insert the cutting along the hole, and then seal the hole practically, the cutting depth is 2/3 of the length of the cutting, the spacing of the plant is 20 cm, the spacing is 40 cm, and the water is poured.

3. Management At the end of the cutting process, cover the bed with a plastic film, seal it with soil, and shade it with a shade net. If the temperature is too high and the humidity is too high, open both ends of the film to allow air circulation. Generally, rooting can take place in about three weeks. After cuttings take root, the coverings are gradually removed in batches. After the seedlings are inserted, the seedbeds should be kept moist. In the seedling stage, they should be watered with small water and clean water to infiltrate the seedbeds. It is usually irrigated once every 3 to 5 days. After 40 days of cutting, quick-acting fertilizers should be followed, and fertilizers should be applied in stages to see how Miaoqiao works. Nursery weeding from the beginning of April to the end of September, soil seedlings should be shallow, large seedlings should be deep, the general depth of 2-4 cm soil, then increased to 8 to 10 cm, seedlings hardening period should stop loose soil weeding. Crape Myrtle leaves often stained with powdery mildew and coal contamination, can be sprayed in the spring before germination 3 - 5 Baume degrees lime sulfur or growth spray 70% thiophanate-methyl WP 800-1000 times, 25% triadimefon 800 times liquid.

4. Seedlings are transplanted and the seedlings are transplanted in the evening of tomorrow or in the evening before the flow of spring sap in spring. The seedlings should be transplanted for 2 to 3 days before transplanting. Water should be poured, and the root system must be protected when raising seedlings. Transportation is planted, water is poured after planting, and seedlings are shaded.

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