T/DBZSC 005-2022 Active

Main technical content: 4. Harvest quality and safety: Strictly enforce the safety interval for pesticide application 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 the outer leaves begin to turn yellow and dry without new growth, start harvesting when the fleshy roots are fully swollen. Avoid irrigation 7-10 days before harvest. Harvest during sunny days. Minimize mechanical damage during harvest and avoid exposure to sunlight after harvest. 5. Post-harvest processing: - Remove the leaf tassels from the carrots in the field, ensuring no damage to the fleshy roots. Keep the carrots fresh, free from mold, with no visible blemishes, striations, or scars. - For washing and cleaning, use a medium-pressure spray cleaning method with a roller brush cleaning machine operating at 192 rpm to remove surface soil and debris. - For peeling and polishing, use a medium-pressure spray cleaning method with a roller brush cleaning machine at 192 rpm to remove the carrots' skin. Then use a 0.020 mm roller brush to smooth and remove minor brush marks. Finally, use a 0.018 mm roller brush to achieve a glossy, smooth texture. - Product grade and specification classification: Classify carrots based on size, root shape, and color. 6. Packaging: - Packaging materials must be non-toxic, non-polluting, and meet transportation requirements. Corrugated cardboard should comply with GB/T 6543 standards, with ventilation holes of 15–20 mm in diameter on both sides. Polyethylene freshness bags should meet GB 4806.7 requirements, with a thickness of 0.03–0.04 mm. Polystyrene foam boxes should also meet GB 4806.7 requirements. - Packaging methods: - Use polyethylene film bags for inner packaging in corrugated boxes, arranging them neatly based on box size and maintaining appropriate packing density. - Tie and tightly pack polyethylene fres