T/SXZYC 002-2023 Technical Specifications for the Breeding of High-Quality Seeds of Boreal Codonopsis

Scope

Main technical content: Based on literature research and production technology investigation, research on seed reproduction and production of high-quality North Codonopsis was carried out, mainly including quality standards of high-quality seeds, field management, fertilization techniques, pest and disease control, seed harvesting, storage and quality inspection, etc., to complete the technical specifications for the breeding of high-quality North Codonopsis. North Codonopsis should first meet the quality standards of high-quality North Codonopsis, and then improve its seed yield through relevant cultivation techniques. 1  Selection of high-quality North Codonopsis materials: Cultivated varieties of Bupleurum L., belonging to the Umbelliferae family, which have passed the variety authentication/identification/registration/registration procedures. Seeds harvested in the autumn of the previous year or in the current year are selected and graded according to the following quality standards. Seeds of grades 1-2 are selected as breeding materials for high-quality seeds. | Grade | Germination rate % | Thousand grain weight (g) | Moisture content % | Purity % | --- | --- | --- | --- | --- | 1 | ≥75 | ≥1.10 | ≤9 | ≥96 | 263–75 | ≥1.00 | ≤99 | 3–96 | 52–63 | ≥0.90 | ≤99 | 0–92 | 2  Effect of planting methods on North Codonopsis seeds: Through the comparison of various planting methods such as direct sowing and intercropping, it was found that North Codonopsis is suitable for sowing in the spring of the same year, harvesting seeds in the autumn and winter, and intercropping with crops such as corn or wheat. Seeds are harvested in the second year in the latter two methods, which require certain local microclimate conditions. During the pollination and seed maturation period in the second year, the rainfall should not be too heavy. Through the comparison of direct sowing, film mulching, and small greenhouses, as well as differen

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