T/YNRZ 013-2025 Mangosteen organic fertilizer substitution and reduction of chemical fertilizer technical specification

Scope

Scope: This document specifies the technical requirements for the types and quality of organic fertilizers used to replace chemical fertilizers in mango cultivation, as well as the application methods and production management measures for fertilizers. This document is applicable to mango cultivation management. Main technical content: 1. Fertilizer types and quality requirements 1.1 Organic fertilizers, including farmyard manure and commercial organic fertilizers, shall comply with the provisions of NY 525. 1.2 Potassium sulfate compound fertilizers shall comply with the provisions of GB/T 15063, and urea shall comply with the provisions of GB/T 2440. 2. Fertilizer application 2.1 Application methods 2.1.1 Chemical fertilizers shall be applied in accordance with the provisions of NY/T 880. 2.1.2 For organic fertilizers, a diameter of 1.0 m to 2.5 m shall be established around the trunk of the tree based on its size, with the edge of the tree disk 20 to 30 cm above the ground. In the autumn, the organic fertilizer shall be evenly applied to the tree disk, maintaining a distance of 10 to 20 cm from the trunk. 2.2 New orchards 2.2.1 In the first year, apply 20 to 25 kg of organic fertilizer per tree, and 0.5 to 0.8 kg of compound fertilizer with N:P:K ratio of 15:15:15, and 0.3 to 0.5 kg of 46% urea. 2.2.2 In the second and third years, apply 30 to 40 kg of organic fertilizer per tree, and 0.5 to 0.8 kg of compound fertilizer with N:P:K ratio of 15:15:15, and 0.3 to 0.5 kg of 46% urea. 2.2.3 In the fourth and fifth years, apply 35 to 40 kg of organic fertilizer per tree. 2.2.4 After the fifth year, apply 40 to 50 kg of organic fertilizer per tree, along with 0.3 to 0.6 kg of molybdenum sulfate, 10 to 20 g of manganese sulfate, 10 to 20 g of boron fertilizer, 30 to 50 g of zinc sulfate, and 10 to 15 g of potassium dihydrogen phosphate. Sprinkle lime on the soil to maintain a pH value of 5.5 to 7.5. 2.3 Mature orchards 2.3.1 In the first year, apply 40 to 50 kg of org

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