T/YNRZ 005-2026 Technical Regulations for Cutting Propagation of Garcinia yunnanensis
T/YNRZ 005-2026 Technical Regulations for Cutting Propagation of Garcinia yunnanensis
Basic Information
Scope
This document specifies the requirements for the preparation of nursery sites, cutting techniques, bed management, bagging, seedling removal, and production records for the cuttings of Yunnan Jade Vine (Phyllanthus urinaria). This document is applicable to the production of cuttings of Yunnan Jade Vine. 1 Nursery Site Preparation 1.1 Site Selection Select a site with flat terrain, sufficient sunlight, fertile soil, convenient transportation, and irrigation conditions. 1.2 Shade Shed Construction Determine the shape of the shade shed frame based on the nursery terrain, with its length and width determined by actual conditions. The height of the shade shed should be 3.0 m to 3.5 m. Cover the top and sides of the shed with a 85% shading net. 1.3 Bed Specifications The bed width should be 1.0 m to 1.2 m, with a height of 30 cm to 35 cm. The length of the bed depends on the terrain, and the spacing between beds should be 30 cm. 1.4 Cutting Substrate and Disinfection Mix humus soil and fine river sand in a 1:1 volume ratio. Spray the substrate with a 50% Multisporin WP solution at 600 to 800 times dilution 5 days before cutting to disinfect it. 1.5 Substrate Humidity The substrate humidity should be maintained at a level where it can be formed into a clump without dripping water. 2 Cutting Techniques 2.1 Cutting Time Every spring from February to April, or autumn from August to October. 2.2 Cutting Stock Collection Select Yunnan Jade Vine plants that are at least 10 years old, healthy, and free from diseases and pests. Cut off woody branches with a diameter greater than 1.5 cm. 2.3 Cutting Stock Treatment Cut the branches into 15 cm-long shoots with 2 to 3 buds retained. Cut the upper cuttings flat, wrap the lower cuttings in plastic film, and cut the lower ends at a 45° angle. Remove all leaves from the lower part of the cuttings and retain one-third of the upper leaves. Soak the lower 5 cm of the cuttings in a 5% Indoxacarb WP so