\nT/YNRZ 013-2024 Persimmon Seedling Raising Technical Specifications

Scope

Scope: This document specifies the nursery selection, rootstock seedling cultivation, grafting, seedling removal, and transportation for loquat seedling propagation. This document is applicable to loquat seedling breeding; Main technical contents: 1. Terms and definitions: There are no terms or definitions that need to be defined in this document. 2. Nursery selection: 2.1 Environmental conditions: Select an agricultural production area with convenient transportation, good ecological environment, no pollution, sufficient sunlight, a slope of ≤15°, and an altitude of ≤1000 m. The environmental conditions should meet the requirements of NY/T 391. 2.2 Climate conditions: The average annual temperature is ≥18°C, and the extreme minimum temperature is ≥0°C. 2.3 Soil conditions: Select an area with deep soil layers, good soil structure, a pH value of 5.5~6.5, and sandy or red soil rich in organic matter, with a groundwater level of ≤1 m. 3. Rootstock seedling cultivation: 3.1 Bed preparation: The width of the seedling bed is 1 m, and the length is 15 m~20 m. The distance between seedling beds is 0.4 m~0.6 m. 3.2 Nutrient soil bagging: The seedling-use soil is exposed to the sun for more than 7 days. Add 150 kg~200 kg of commercial organic fertilizer, 100 kg~200 kg of coconut husk, and 1 kg~2 kg of calcium-magnesium phosphate per cubic meter of soil. Mix well, and the fertilizer meets the requirements of NY/T 394. The prepared nutrient soil is packed into 25 cm~30 cm high and 18 cm~25 cm wide nutrient pots (bags), and the nutrient pots are placed on the prepared seedling beds. Cover the nutrient pots with a 0.05 mm thick black mulch film (width ≥0.6 m~0.8 m) and compact the soil around the film. 3.3 Seed selection: Select mature and disease-free seeds of varieties such as "Jielingzong", "Changhong No. 3", and "Wuxing" for sowing immediately after collection. 3.4 Germination promotion: Mix the seeds with fermented moist sawdust at a ratio of 1:5, stack them with a height of

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