T/NAASS 134-2025 Technical rule for alfalfa seed production

Scope

This document specifies the selection of land, sowing, field management, seed harvesting and processing, and storage for Medicago sativa (alfalfa) seed production. This document is applicable to the irrigation areas of Ningxia. 3 Terms and Definitions This standard does not set out any terms or definitions. 4 Site Selection Climate Conditions The average annual temperature ≥4 ℃, the accumulated temperature ≥10 ℃ is 2200℃–3500℃, and the annual rainfall ≤450 mm. Soil Conditions Loam or sandy loam with a salt content ≤3 ‰ and a deep soil layer. Previous crops should be corn and cereal crops, and the rotation period should be ≥3 years. Irrigation and drainage conditions are required. Interrow Distance Implemented in accordance with NY/T 1210. 5 Sowing Soil Preparation Deep plowing ≥30 cm before sowing, leveling the field with a laser leveling instrument, and compacting the soil. Drip irrigation tape laying: 15 cm deep, with the interrow distance consistent with the seed field row spacing. Soil Herbicide Treatment Soil herbicide treatment before sowing. Implemented in accordance with DB64/T 1259. Sowing Time Sowing can be carried out from early March to late July. Sowing Method Strip sowing or hole sowing. Strip sowing: row spacing 50 cm–70 cm; hole sowing: row spacing 70 cm–90 cm, planting spacing 30 cm–40 cm. Sowing depth 1.5 cm–3 cm. Compacting the soil after sowing. Sowing Rate For every 667 m2, strip sowing 120 g–150 g, hole sowing 50 g–75 g. 6 Field Management Irrigation 6.1.1 Establishment Period Irrigate in time according to soil moisture conditions. 6.1.2 Production Period During the budding stage, irrigate 15 m3 per 667 m2; during the flowering stage, adjust the irrigation amount according to soil moisture conditions, with an irrigation volume of 15 m3–30 m3 per 667 m2. Weed Control Implemented in accordance with DB64/T 1259. Fertilization During the budding stage, apply 5 kg of KH2PO4 per 667

Development Information

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