Can the trunk of an osmanthus tree be sawed off?
As one of the traditional top ten famous flowers, the osmanthus tree is deeply loved for its rich fragrance and unique shape. When the plant shows signs of aging, unbalanced shape, or disease, pruning the trunk becomes a necessary measure. This article systematically analyzes the entire process of sawing off the trunk, from operational specifications to care details, to help you complete the plant transformation scientifically.
Feasibility Analysis of Pruning the Trunk of an Osmanthus Tree
It is completely feasible to saw off the trunk in adult plants with healthy roots and over 5 years old. The recommended retention height should be controlled between 40-60 centimeters, and it needs to be accompanied by a breathable pot with a diameter of over 30 centimeters. The best operation time is from the period of Jingzhe to Chunfen, when the sap starts to flow and the formation speed of callus tissue increases by 40%.
Three Key Elements of Correct Sawing Operation
Tool Pre-treatment Specifications
Use a curved saw disinfected with 75% alcohol to make a quick cut at a 30-degree angle to avoid forming a rough cut surface. The cut should be 5-8 centimeters away from the nearest bud point, leaving ample growth space.
Cut Surface Sealing Technique
Use a mixture of beeswax and rosin in a 3:1 ratio, combined with a 0.1% solution of carbendazim for double protection. The coating thickness should reach 2-3 millimeters, with the edges extending to form a complete protective circle.
Four Key Points of Post-Sawing Maintenance
Temperature and Humidity Control System
Set up a temporary sunshade to maintain a constant temperature environment of 18-25°C, with air humidity controlled between 60-70%. Use a misting spray device to water three times a day, with each session lasting no more than 30 seconds.
Nutrient Supply Plan
After new buds sprout, apply a 20-10-10 compound fertilizer with nitrogen, phosphorus, and potassium, diluted 1000 times, twice a month. From June onwards, switch to using potassium dihydrogen phosphate foliar fertilizer, combined with composted soybean cake fertilizer to improve the soil.
Disease and Pest Defense System
Regularly spray a biological preparation of matrine plus azadirachtin to focus on controlling the larvae of longicorn beetles and (T-J) disease. Rotate the use of mancozeb and pyraclostrobin every 15 days for disease prevention.
Shaping Management Techniques
When new branches reach 15 centimeters, pinch the tips, leaving 3-4 pairs of leaves. Use aluminum wire binding combined with weight traction to gradually shape the ideal tree form.
Through scientific pruning and systematic maintenance, a new tree crown can be formed about 120 days after sawing off the trunk of the osmanthus tree. The next autumn flowering period can still maintain over 70% of the flowering amount, and the ornamental value can be fully restored within three years. It is recommended to combine regular soil replacement and root pruning to achieve sustainable and healthy growth of the plant.