How long will it take for plum cuttings to take root?
As the first of the traditional famous flowers in China, plum cutting is an important way to continue excellent varieties. Mastering the correct cuttage time and method can not only shorten the rooting cycle, but also increase the survival rate to more than 90%. This paper will analyze in detail the core points of hard branch cutting in winter from key links such as controlling the cutting season to substrate ratio. Analysis of the rooting cycle of plum cuttings during winter dormant period The optimal cuttage period is from November to January of the following year, when the plants are in dormant period, the branches have sufficient nutrients and the temperature is stable at 5-10℃. The low temperature environment can effectively inhibit bacterial reproduction. Combined with the microclimate formed by plastic film coverage, the incision can complete callus formation and root development in about 60 days. Seasonal comparison experimental data were measured by professional nurseries: the survival rate of cuttage in winter reached 92.3%, and only 35% and 18% in spring and summer respectively. Although the temperature rises in early spring, the nutrient loss of branches is serious; high temperature and high humidity in midsummer can easily cause incision rot. Five steps to master the tips of plum cutting. Select 1-2-year-old semi-lignified hard branches with a diameter of 0.6- 1 cm. The "three-observation method" was adopted: the epidermis showed greyish-brown with longitudinal fine lines, the bud points were full, and the pulp core accounted for less than 1/3. Keep 3-4 bud nodes when cutting, cut the top flat and the base obliquely 45° to increase the water absorption area. The scientific ratio of the substrate recommends using a mixed substrate of humus: perlite: vermiculite =5:3:2, and the pH value is controlled at 6.0-6.5. Add 50g of carbendazim to every cubic meter for disinfection, lay to a thickness of 20cm and compact to ensure a water permeability coefficient of 15-20mm/min. How long will it take for plum cuttings to take root? Intelligent temperature control management builds a small arch shed to maintain a humidity of 85%. The temperature during the day is maintained at 18-22℃ and at no lower than 5℃ at night. An intermittent spray system is used to spray water for 5 minutes at 10 a.m. and 3 p.m. every day. Supplement 0.1% potassium dihydrogen phosphate foliar fertilizer every 10 days. At the key point of later maintenance, when the new shoots grow 5 cm, the film will be gradually removed and the seedlings will be refined, and the sunshade rate of 50% will be maintained during the transition period. Before transplanting in the spring of the following year, roots were irrigated with 1000 times ABT rooting powder to promote capillary root development. Pay attention to the prevention and control of aphids and (T-J) diseases, and regularly spray imidacloprid and mancozeb.
By accurately grasping the cuttage timing during the dormant period, cooperating with scientific substrate ratio and temperature and humidity control, the cultivation effect of plum cuttings for 60 years can be achieved with annual growth of 40cm. It is recommended that grafting nurseries establish cuttage archives to record the rooting differences of different varieties and continuously optimize the reproduction system.