T/QTDGXH 02-2024 Active Group standards

T/QTDGXH 02-2024 The Bridgehead Sweet potato Technical Specification

Publish Date: 2024-07-28 Implement Date: 2024-08-01 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/QTDGXH 02-2024

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Terminology (principles and coordination and cooperation)

Publish Date: 2024-07-28

Implement Date: 2024-08-01

Scope

Main technical content: 1. Leveling: Thoroughly plow and cultivate the potato field using two plows and two harrows or one plow and two harrows. The plowing depth should be 25–30 cm, with an interval of 7–10 days between each plowing or harrowing. Sun-dry the soil to ensure it is deep, loose, fine, and level. 2. Ridge-raising: After the second harrowing, raise the ridge. The ridge spacing (including the ridge ditch width) should be 90–100 cm, with a ridge width of 60–70 cm, a top width of 40 cm, and a ridge height of 30–35 cm. Requirements include uniform ridge spacing, straight ridges, full ridge shapes, smooth ridge surfaces, deep and narrow ridge ditches, and a north-south orientation for the ridges. During ridge-raising, the soil should not be too wet or too dry—dry is preferable to wet. 3. Applying base fertilizer: Apply sufficient organic fertilizer as base fertilizer during land preparation. For each hectare, use 7.5–15 tons of commercial organic fertilizer, biological organic fertilizer, or animal manure (e.g., cow dung, sheep dung). The commercial organic fertilizers and biological organic fertilizers must meet the requirements of NY 525 and NY 884, and the animal manure should be fully composted before use, following the guidelines in NY/T 1334 and GB/T 25246. Before the second harrowing, evenly spread the organic fertilizer on the soil surface. For soils with high acidity, apply acid soil conditioners according to the instructions, adjusting the soil pH to 5.0–7.0. 4. Planting 7.1.1 Selection of strong seedlings: Use detoxified seed potatoes (seedlings) with first- and second-grade quality meeting the requirements of NY/T 1200 and NY/T 402. Use cuttings as seedlings. Select seedlings aged 30–35 days, with a stem length of over 30 cm, short internodes (3–4 cm, occasionally 5 cm), three evenly spaced leaves at the top, bright green leaves, thick leaves of moderate size, flexible stems that do not break easily, and abundant white sap with thick con