T/ZHDZ 004-2022 Active Group standards

T/ZHDZ 004-2022 Winter jujube pest and disease prevention and control technical specifications in Zhanhua, Shandong province, China

Publish Date: 2022-06-16 Implement Date: 2022-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/ZHDZ 004-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Terminology (principles and coordination and cooperation)

Publish Date: 2022-06-16

Implement Date: 2022-07-01

Scope

Main Technical Content: 3.1 Selecting Vigorous Seedlings and Determining a Reasonable Planting Density When establishing an orchard, it is necessary to select high-quality seedlings with strong growth, well-developed root systems, and no pests or diseases. The plot should have fresh air, pure water, and unpolluted soil. The terrain should be flat, open, and well-lit, with fertile soil, good irrigation and drainage conditions, and no natural harmful or toxic substances. The soil mineral content should be within normal ranges, with no pesticide residues or pollution. Proper planting is essential. The planting depth should be such that the root neck is level with the ground. Avoid planting too deeply, as this may affect tree growth. Additionally, determining a reasonable planting density is crucial. Overly dense planting can lead to crown shading, increased relative humidity in the orchard, insufficient sunlight, excessive branch growth, and weakened disease resistance, creating favorable conditions for pests and diseases. A planting spacing of 3m × 4m is generally reasonable for production. 3.2 Applying Organic Fertilizer to Enhance Tree Nutrition and Resistance to Pests and Diseases Applying organic fertilizer can effectively increase soil organic matter content, improve soil aeration and structure, and promote root growth, thereby strengthening tree vigor and resistance to pests and diseases. The optimal application time is generally in autumn (September–November) or early spring (March–April), with early autumn application being preferred. The application amount for young trees is 20–50kg per tree, and 5 cubic meters of composted manure per mu. For mature trees (fruit-bearing trees), the amount can be determined based on yield-to-fertilizer ratio—generally, 1kg of winter jujube requires 1kg of organic fertilizer or 5 cubic meters of composted manure. For young trees, use annular trench fertilization; for mature trees, use radial trench fertilization. 3.