T/NAASS 144-2025 Code of practice for intensive plug seedling of watermelon

Scope

This document specifies the seedling-raising facilities, substrates and trays, facility disinfection, substrate treatment, variety selection, sowing, seedling management, seedling standards, packaging and transportation, and production records for the intensive tray-based seedling production of watermelon in Ningxia, including multi-span greenhouses and daylight greenhouses. This document is applicable to the intensive tray-based seedling production of watermelon in facilities such as multi-span greenhouses and daylight greenhouses in Ningxia. 3 Terms and Definitions This document does not define any terms or definitions that require clarification. 4 Seedling Raising Facilities 4.1 Greenhouse Conditions The infrastructure for seedling production in intelligent multi-span greenhouses and energy-saving daylight greenhouses shall comply with the provisions of NY/T 2442 and DB64/T 1781. The seedling-raising area shall have unobstructed water and electricity supplies and convenient transportation. The greenhouse shall be equipped with seedling-raising beds for placing trays and automated heating, ventilation, lighting, shading, irrigation, tray-loading, and sowing equipment. It shall also have spacious and clean areas for substrate preparation, tray-loading, and sowing, as well as complete disinfection facilities. 4.2 Seedling Raising Bed Frames The bed frames shall be placed in an east-west orientation, with a height of 80?cm to 100?cm and a width of 220?cm, and their length shall be unrestricted. A 120?cm-wide walkway shall be left between the bed frames. 4.3 Watering Equipment Install a hanging automatic sprinkler system or use hoses with a 2?mm-diameter nozzle. 4.4 Water Source Conditions The irrigation water quality shall comply with the provisions of GB 5084. 5 Substrates and Trays 5.1 Substrates Commercial seedling substrates shall be selected, and their quality shall comply with the provisions of NY/T 2118. Alternatively, a self-prepared substrate can be u

Development Information

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