T/GDOAA 0025-2023 Winter jujube production technical regulations for facilities

Scope

Scope: This document specifies the terms and definitions, production bases, planting management, pruning and shaping, tree coordinated management, temperature and humidity control, soil and fertilizer management, pest and disease control, and production archives for the production of winter jujube in facilities. This document is applicable to the management of winter jujube production in facilities; Main technical content: 5.1 Applicable objects (3.2; 5.1): The drafting group surveyed the planting density and yield of trunk-shaped jujube trees in Yuncheng City's Yanhu District (Ren Village, Shibeizhuang Village in Taocun Town, Huo Zhao Village in Wangfan Town, and Xigexian Village in Beixiang Town) and Nanyin County's Miaoshang Town, etc. For trunk-shaped trees with high planting density, the planting spacing is 0.6 m to 1.0 m × 1.6 m to 2.0 m, with a planting density of 333 to 521 trees per 666.7 m2. The trees can be shaped in two years, with a trunk height of 30 cm and a tree height of 1.7 m to 1.8 m. They develop from a single jujube branch, and the secondary branches on it serve as the main fruiting branches. There are typically 10 to 14 secondary branches per branch, with 7 to 10 jujube stems per secondary branch, and a crown diameter of about 1.0 m. There are approximately 30,000 to 40,000 effective jujube stems per 666.7 m2, with a yield of around 1,500 kg per 666.7 m2. Trunk-shaped trees (Yuncheng City's Yanhu District and Ren Village, Nanyin County's Miaoshang Town) have a planting spacing of 2 m × 3 m, with a planting density of 110 trees per 666.7 m2. They can be shaped in three years and reach high yield in four years. During the high yield period, the yield can reach around 1,500 kg per 666.7 m2, and the maximum yield in the fifth year can reach 2,000 kg. The experimental results show that trunk-shaped jujube trees form faster, achieve early high yield, and are simple to manage with good yield. 5.2 Tree shape cultivation (6.1; 6.2): A survey of

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