T/YNRZ 004-2026 Active Group standards

T/YNRZ 004-2026 Technical Regulations for Grafting Propagation of Garcinia yunnanensis

Publish Date: 2026-01-29 Implement Date: 2026-02-15 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/YNRZ 004-2026

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Technical management

ICS Name: Plant cultivation

Publish Date: 2026-01-29

Implement Date: 2026-02-15

Scope

This document specifies the techniques for grafting and seedling production of Yunnan Rattan, including the selection of scions and rootstocks, grafting, management of grafted seedlings, pest and disease control, seedling removal, and file management. This document is applicable to the production of grafted seedlings of Yunnan Rattan. 1 Scions 1.1 Selection of scions Select well-developed, bud-rich, and disease-free woody branches from the outer and middle parts of the crown of mother trees aged 10 to 25 years. 1.2 Processing of scions Scions are collected in the morning. Leaves on the scions are removed, and axillary buds are retained. The scions are soaked in a solution of 50% Multisporin WP at a concentration of 800 to 1,000 times for 3 to 5 minutes, dried, and cut into pieces containing one bud and 2 to 4 cm in length. They are kept moist with a clean, damp towel and used immediately after collection. 2 Selection of rootstocks Use seedling plants produced by T/YNRZ 003-2026 as rootstocks. 3 Grafting 3.1 Timing It is carried out between February and April each year, before 10 a.m. and after 4 p.m. on sunny days. 3.2 Methods The cut grafting method is used, as shown in Figure 1. The grafted scions are fully enclosed in plastic film during the grafting process. The steps are as follows: a) Cutting the rootstock: Cut the rootstock about 20 to 25 cm above the base to form a 60° slope. Leave 1 to 2 leaves below the cut and make a vertical incision from the base of the rootstock to the cambium layer on the higher side, with an incision length of 1.5 to 2.5 cm; b) Cutting the scion: Select a scion with a diameter similar to that of the rootstock, with a length of 2 to 4 cm and one bud or more. On the side opposite the bud, cut a smooth surface of 1.7 to 2.8 cm in length. The depth of the scion inserted into the rootstock incision should expose 0.2 to 0.3 cm (white exposed) on the upper end of the long incision surface, and a short incisi