How to seedling cultivation of Rhizoma Paridis
As a rare Chinese medicinal material, the seedling cultivation of Rhizoma Paridis is a crucial step in the cultivation process. Mastering scientific seedling cultivation methods can not only improve the germination rate but also lay a solid foundation for subsequent transplantation. This article will systematically explain the four core technical points of Rhizoma Paridis seedling cultivation, from soil preparation to seedling management.
Environmental control for Rhizoma Paridis seedling cultivation
Soil proportion and base fertilizer application
The recommended seedling substrate is a golden ratio of humus soil: river sand = 3:1, and the soil layer thickness should be maintained at 20cm or more. For every cubic meter of substrate, add 5kg of decomposed sheep manure and 2kg of superphosphate, mix well, and then subject to high-temperature disinfection treatment to effectively kill pathogenic bacteria in the soil.
Light and humidity management
Set up a seedling shed with a shading rate of 75%, and maintain the air humidity between 70%-80%. Use a mist spray irrigation system, spray water 2-3 times a day, each time lasting no more than 30 seconds to ensure the surface soil is moist without waterlogging.
Seed treatment technology for Rhizoma Paridis
Seed selection criteria
Select mature seeds that are purple-brown and have a diameter of ≥3mm, with a thousand-seed weight of 35g or more. Use the saltwater specific gravity method for selection, prepare a 1.15g/cm³ sodium chloride solution, and eliminate poor-quality floating seeds.
Stratification for germination
Mix the seeds with moist vermiculite at a ratio of 1:3, and place them in a 5°C environment for low-temperature stratification. Turn them over once every 7 days, continue for 90-120 days until the seeds show white, this process can increase the germination rate to over 85%.
Key points of sowing management for Rhizoma Paridis
Control of sowing density
Use the drill sowing method, with a row spacing of 15cm, plant spacing of 3cm, and sowing depth of 1.5-2cm. Control the sowing amount to 200-250 seeds per square meter, cover with the substrate and gently press to ensure the seeds are fully in contact with the soil.
Seedling care specifications
After seedlings emerge, spray 0.1% potassium dihydrogen phosphate solution weekly, maintain soil temperature at 18-22°C. When the seedlings have grown 3 true leaves, perform the first thinning, eliminate weak and diseased seedlings, and retain healthy seedlings with a spacing of more than 5cm.
Through scientific soil management, precise seed treatment, standardized sowing operations, and systematic seedling care, it is possible to achieve a success rate of over 85% for Rhizoma Paridis seedling cultivation. It is recommended to control the seedling cultivation period to 8-10 months. When the seedlings reach a height of 15cm and the root system is fully developed, they can be transplanted to the field.