T/YNGA 007-2023 The Standard for Production of High-quality Varieties of Naroq African Dogtail Seedling Production Group

Scope

Scope: This standard specifies the technical specifications for the production of high-quality seeds of Naroq African dogtail grass in Yunnan Province, including seed selection, sowing, harvesting, processing, storage and transportation, as well as field management techniques. This standard applies to the production of high-quality seeds of Naroq African dogtail grass in Yunnan Province; Main technical content: 1. Scope 2. Normative reference documents 3. Terms and definitions 3.1 High-quality seeds 3.2 Naroq African dogtail grass 4. Seed production 4.1 Seed selection 4.2 Selection of seed fields 4.3 Sowing 4.3.1 Leveling the soil: Lightly harrow the topsoil before sowing to loosen and remove weeds from the topsoil layer. 4.3.2 Sowing time: Sow from June to July. 4.3.3 Sowing amount: 15kg/hm2 to 22.5kg/hm2. 4.3.4 Sowing depth: 1cm to 2cm. 4.3.5 Sowing method: Row sowing with a row spacing of 50cm and a sowing width of 1cm to 2cm. 4.3.6 Sowing method: Mix a certain proportion of fine soil and calcium magnesium phosphate fertilizer with the seeds. The mixed seeds must be used up on the same day. Evenly sow the mixed seeds and fertilizer at a ratio of 1:1 in the prepared soil, then lightly cover the soil with branches 1cm to 2cm thick and compact it appropriately to ensure good adhesion between the seeds and the soil and facilitate germination and emergence. 4.4 Field management 4.4.1 Tillage and leveling: One week after spraying herbicides, deep till and plow once, with a tillage depth of 25cm to 30cm and three to five heavy harrowings to ensure that the soil particle diameter is less than 1cm and remove stones, grass roots and other impurities. 4.4.2 Application of planting fertilizer: According to the soil fertility conditions, apply 300kg/hm2 to 500kg/hm2 of calcium magnesium phosphate fertilizer, 150kg/hm2 to 200kg/hm2 of potassium sulfate, 3kg/hm2 to 5kg/hm2 of borax, and 3kg/hm2 to 5kg/hm2 of copper sulfate and zinc sulfate when establishing the seed field. Fo

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