T/HNFX 004-2022 Active Group standards

T/HNFX 004-2022 Sweet corn selenium-rich cultivation technical specification in Jiahe County

Publish Date: 2022-09-18 Implement Date: 2023-01-01 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/HNFX 004-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Plant cultivation

Publish Date: 2022-09-18

Implement Date: 2023-01-01

Scope

Main Technical Content: 3.1 Selenium-rich soil contains abundant natural selenium elements, with a selenium content in the soil no less than 0.4mg/kg, and harmful heavy metal elements present at levels below the screening values for soil pollution risk in agricultural land. 3.2 Selenium-enriched sweet corn is produced using selenium-rich soil resources or biological resources from Jiahe County. The selenium is naturally enriched during the growth process or through selenium bio-nutrition enhancement techniques, rather than being added post-harvest. The total selenium content in the edible parts (calculated as dry weight) should reach 15ug/100g~40ug/100g, with organic selenium accounting for at least 80% of the total selenium content. 4. The soil quality of the production area should meet the requirements of NY/T 391, the atmospheric environment should comply with GB 3095, and the irrigation water should meet GB 5084 standards. 5. Production Techniques 5.1 Variety Selection: Sunflower and Jin Yinbao varieties with strong selenium enrichment capabilities suitable for cultivation in Jiahe County should be selected, and the seed quality should meet the requirements of GB 4404.1. 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 weed control can be implemented in accordance with GB/T 17315 and local field management practices. 5.3 Fertilizer Application: - Organic fertilizer: Organic fertilizers meeting the quality requirements of NY 525 should be used. The limit values for heavy metals should comply with NY 525. Before planting, basal fertilization can be carried out with 22.5t/hm2~30t/hm2 of composted farmyard manure or 3t/hm2~6t/hm2 of commercial organic fertilizer. - Inorganic fertilizer: Inorganic fertilizers should comply with NY/T 496. Before planting, basal fertilization can be carried out with 1500kg/