T/NAASS 136-2025 Code of practice for east-west ridge cultivation of tomato in greenhouse

Scope

This document specifies the technical requirements for the cultivation of tomatoes in east-west ridge greenhouses, including greenhouse structure, seedling requirements, farming methods, and cultivation management. This document is applicable to the production of tomatoes in daylight greenhouses in the Yongning Irrigation Area of Ningxia. 3 Terms and Definitions The following terms and definitions apply to this document: east-west ridge cultivation A cultivation method in which tomatoes are planted in east-west direction with narrow beds and wide ditches in daylight greenhouses. 4 Daylight Greenhouse Requirements 4.1 Structural Parameters The length of the daylight greenhouse shall be ≥80 m, with a net span of ≥9 m and a ridge height of ≥4 m. The ratio of ridge height to span should be 12–12.2 cm, and the height from the front base angle to the frame should be ≥1.5 m. There should be no pillars inside the greenhouse, and the gable wall should be equipped with mechanical ventilation channels with a height of ≥2.5 m and a width of ≥2.2 m. 4.2 Other Requirements Use high-transparency, good drip resistance, strong anti-fog performance, and 0.1–0.12 mm thick plastic film. Provide facilities such as ventilation, roller curtain, and integrated water and fertilizer management. 5 Seedling Requirements 5.1 Variety Selection Select tomato varieties that are resistant to low temperatures, weak light, diseases, high yielding, and of high quality, and which have been registered by the state. The seed quality shall comply with GB 16715.3. 5.2 Seedling Follow the requirements of NY/T 2312. 5.3 Strong Seedling Indicators For seedlings planted with semi-automatic transplanting machines, the requirements are: plant height 15–18 cm, stem diameter ≥0.4 cm, number of leaves 4–5, and crown width ≤14 cm. For seedlings planted with fully automatic transplanting machines, the requirements are: plant height 10–14 cm, stem diameter ≥0.3 cm, number of l

Development Information

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