What Season is Best for Transplanting海棠 (Malus spectabilis) Seedlings
As a popular variety for courtyard planting, the transplanting technique of海棠 (Malus spectabilis) seedlings directly affects the survival rate and later growth of the plants. This article will systematically analyze the core points from three dimensions: timing, soil-retaining operations, and transplanting methods, to help gardening enthusiasts master scientific transplanting techniques.
I. The Prime Season for Transplanting海棠 Seedlings
1.1 Advantages of Transplanting in Spring
When temperatures stabilize between 12-20°C in March-April, and the soil thaws, the plants begin to sprout. Transplanting at this time can take advantage of the growing season for quick recovery. It is recommended to choose consecutive cloudy days to avoid direct sunlight that could cause leaf burns.
1.2 Key Points for Transplanting in Autumn
After the leaves fall in October-November, when the ground temperature is maintained above 8°C. It is necessary to note that in the northern regions, transplantation should be completed 30 days in advance to ensure that the roots are established before the soil freezes, and pine needles can be used for insulation.
II. Key to Survival for Bare-Root Transplanting
2.1 Risks of Transplanting without Soil Ball
Experimental data shows that a soil ball with a diameter of 5 cm can retain 80% of the capillary roots. The survival rate of completely bare-root transplantation is only 40%-50%. It is recommended to retain at least 30% of the native soil and wrap the roots with yellow clay slurry to keep them moist.
2.2 Emergency Treatment Plan
In case of urgent transplantation, cut off 50% of the branches and leaves to reduce transpiration, soak the roots in ABT root powder solution (1000 times) for 2 hours, and after planting, set up a shade shed to maintain air humidity above 65%.
III. Professional-Level Transplanting Operation Guide
3.1 Scientific Seedling Removal Techniques
Reduce soil moisture to 30% by controlling water 7 days in advance, and use the circular digging method to retain the soil ball. Tools should be disinfected with alcohol to prevent infection of the wound by pathogens.
3.2 Root Pruning Standards
Retain the main root length between 15-20 cm and cut off the brown necrotic roots. The cut should be at a 45-degree angle, apply charcoal powder to promote healing, and retain 3-5 main lateral roots.
3.3 Planting and Care Points
Use a mixed matrix of decomposed leaf soil, river sand, and garden soil in a ratio of 2:1:1, and maintain a planting depth 2 cm above the original soil mark. After浇透 (watering thoroughly) the first time, cover with plastic film to keep the soil warm and moist.
Mastering the temporal and operational details of transplanting海棠 seedlings can increase the survival rate to over 90%. It is recommended to choose the amount of soil to be taken with the plant size, prioritize bare-root transplantation in spring, and recommend soil ball transplantation in autumn. Regularly observe the sprouting of new buds and supplement phosphorus and potassium fertilizers to promote root development.