T/SJZL 001-2023 Songjiang Rice. Production Area Environmental Conditions

Scope

Main Technical Content: 3 Terms and Definitions The terms and definitions defined in NY/T 1054 and the following terms and definitions apply to this document. 3.1 Songjiang Rice Refers to rice originating from the Songjiang District of Shanghai City, produced in accordance with specific Songjiang rice production techniques, and meeting national food safety regulations. 4 Geographical Conditions 4.1 Topography and Soil The cultivation of Songjiang rice should be carried out in areas with the following characteristics: - Longitude: 121°02′–121°36′ - Latitude: 30°40′–30°89′ - Elevation: approximately 3 m - Deep soil layers, fertile soil, good ecological conditions, convenient irrigation and drainage, and convenient transportation. 4.2 Climate 4.2.1 Climate Type North subtropical monsoon climate, with mild and humid weather, distinct seasons, and an average annual temperature of approximately 15.5°C. 4.2.2 Lighting Conditions Abundant sunlight, a frost-free period of approximately 230 days, an average annual sunshine duration of ≥1,900 hours, and an effective temperature above 10°C of ≥4,900°C. 4.2.3 Humidity Abundant rainfall, with an average annual precipitation of ≥1,000 mm, and an average relative humidity of approximately 80%. 5 Environmental Quality 5.1 Air Quality The air quality in Songjiang rice paddies and the inspection methods should meet the requirements of Table 1. Table 1: Air Quality Requirements and Test Methods for Songjiang Rice Paddies Parameter Indicator Test Method Daily Average a1hb Total Suspended Particulate Matter, mg/m2 ≤0.30 GB/T 15432 Sulfur Dioxide, mg/m2 ≤0.15–0.50 HJ 482 Nitrogen Dioxide, mg/m2 ≤0.08–0.20 HJ 479 Fluoride, μg/m2 ≤720 HJ 955 a Daily average refers to the average indicator of any one day. b 1h refers to the indicator of any one hour. 5.2 Irrigation Water The quality and inspection methods of irrigation water in Songjiang rice paddies should

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