T/YNRZ 010-2025 Technical Specifications for the Cultivation of Plum Trees

Scope

Scope: This document specifies the selection of orchards, planting, soil and water management, pruning, fruit thinning, pest and disease control, and harvesting for plum cultivation in Huining County, Gansu Province. This document is applicable to plum cultivation in areas with similar natural conditions to Huining County. Main technical content: 1. Site selection: 1.1 The environmental conditions of the orchard meet the requirements of NY/T 391. 1.2 The site conditions are most suitable between 1800 m and 2100 m above sea level, with an average annual temperature of over 10 °C, a minimum temperature of not less than -7 °C, and a January average temperature of not less than 10 °C. Loam, sandy loam, and sandy soils are preferred. The soil layer should be at least 0.5 m thick, with a pH value of 6-8. 2. Planting: 2.1 Variety and seedling selection: 2.1.1 Based on market demand, select suitable local cultivars such as Francois, Lanmi, Elina, Steele, and Xingli Tonglongdan. 2.1.2 Select seedlings with strong growth, good root systems, and a diameter of 0.8 cm at 10 cm above the grafting site, with a height of over 1 m. The seedlings should be free from diseases and pests and mechanical damage. 2.1.3 Before planting, select a short and thick branch as the main stem, remove excess branches, and leave 4-5 shorter side branches. 2.2 Planting density: The general planting spacing is 3 m × 3 m, with about 74 seedlings per mu. 2.3 Pollination tree configuration: For varieties with high self-fertilization, no pollination trees are required. For varieties with low self-fertilization, generally configure 1-2 varieties with high pollen quantity as pollination trees, with a configuration ratio generally not less than 20:1. 2.4 Planting time: Spring and autumn are suitable planting periods. Spring planting should be carried out before bud sprouting, and autumn planting should be carried out after leaf fall. 2.5 Pre-planting land preparation: Convert slope land into 3-m terrac

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