T/DBZSC 002-2022 Pick and Packaging Procedures for Daebupear carrots in the shop

Scope

Main technical content: 4. Harvest quality and safety: Strictly enforce the pesticide safety interval and refrain from harvesting during this period. Harvest requirements: When the functional leaves of carrots turn dark in color and the heart leaves turn yellow-green, stop growth, and when the outer leaves start to wither and no new leaves appear, begin harvesting. Stop watering 7-10 days before harvest. Harvest should be conducted on sunny days. Minimize mechanical damage during harvest and avoid exposure to sunlight after harvest. 5. Post-harvest processing: - Remove the root tips: Cut or twist off the leaf tips of carrots in the field, ensuring no damage to the root during this process. Retain carrots that are fresh, free from rot, with no obvious blemishes, horizontal stripes, or scars. - Cleaning and preparation for transportation and storage: - High-pressure spray cleaning: Use a roller brush cleaning machine with a brush diameter of 0.03 mm at 192 rpm to remove surface soil and debris, and brush off root hairs and residual debris. The cleaning water must meet GB 5749 standards. - Peeling and polishing: Use a high-pressure spray cleaning machine to control the brush speed at 192 rpm. First, remove the root skin with a 0.022 mm brush, then polish the surface with a 0.020 mm brush to smooth out minor brush marks. Finally, use a 0.018 mm brush to achieve a glossy, smooth texture. - Product grade and specification classification: - Classification based on size, root shape, and color: - Superior grade: No misshapen roots, root hairs, or cracked roots. Roots should be uniform in color and texture, free from cold damage or mechanical damage, with no green or purple at the root tip. Single fruit weight deviation not exceeding 10% of the average value, and heart core ratio less than one-quarter. Product specifications meet the length (L) requirements in Table 2. - First grade: Total misshapen roots, root hairs, or cracked roots not exc

Development Information

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