T/CDNX 018-2020 Active Group standards

T/CDNX 018-2020 Selenium-rich yam cultivation technical specifications

Publish Date: 2020-05-06 Implement Date: 2020-05-28 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/CDNX 018-2020

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Fruit and vegetable cultivation and products

ICS Name: Plant cultivation

Publish Date: 2020-05-06

Implement Date: 2020-05-28

Scope

Scope: This standard specifies the terms and definitions, production environment, cultivation techniques, selenium-enrichment techniques, timely harvesting, and file management for the cultivation of selenium-enriched yams. This standard applies to the cultivation of selenium-enriched yams. Main technical contents: 5. Cultivation techniques 5.1 Variety selection: Select varieties with high quality, high yield, and strong resistance. 5.2 Field management: Techniques such as seedling cultivation, land preparation and fertilization, timely transplanting, reasonable planting density, fertilizer and water management, and pest and disease control can be implemented in accordance with local field management techniques. 5.3 Fertilizer application: Fertilizer application shall comply with the provisions of NY/T 394. 5.4 Chemical control of pests and diseases: Chemical control shall comply with the provisions of NY/T 393. 6. Selenium-enrichment techniques 6.1 Selenium supplementation principles: When the selenium content in the underground tubers of selenium-enriched yams produced naturally does not meet the requirements of GH/T 1135, selenium can be supplemented through artificial techniques. 6.2 Selenium fertilizers: Selenium fertilizers or selenium soil conditioners registered by the state shall be selected for selenium supplementation. 6.3 Supplementation methods: Leaf surface supplementation and rhizosphere supplementation. One or both supplementation methods can be selected according to actual production needs. 6.3.1 Leaf surface supplementation: Prepare a selenium solution with a concentration of 70mg/kg to 120mg/kg. Supplement selenium once each at the stages of budding, flowering, and underground tuber enlargement, and spray 450kg to 750kg of selenium solution per hectare evenly. Ensure that both sides of the leaves are sprayed with selenium solution until no water droplets remain. Spray selenium on cloudy days or after 4 PM on sunny days. Use a fine mist sprayer