T/NAASS 138-2025 Code of practice for suitable mechanization cultivation of pepper in plastic tunnel

Scope

This document specifies the requirements for mechanized cultivation of peppers in plastic greenhouses, including the requirements for greenhouse structures, seedlings, farming and cultivation management, and pest and disease control. This document is applicable to the production of peppers in plastic greenhouses in Ningxia region. 3 Terms and Definitions The following terms and definitions are applicable to this document. Suitable for mechanized cultivation: A cultivation method that optimizes greenhouse structures and innovates mechanized cultivation models to better meet the requirements of mechanical operations during the production process. 4 Requirements for Plastic Greenhouses 4.1 Structural Parameters Length ≥ 60 m, span ≥ 8 m, ridge height ≥ 3 m, shoulder height ≥ 1.2 m, with a steel structure overall. The main frame is made of 3 cm × 7 cm elliptical steel tubes (2.0 mm thick), with a spacing of 1.1 m, and equipped with 5 cross-sectional steel tubes (25 mm × 2 mm). The steel tubes are made of hot-dip galvanized material. At both ends of the greenhouse, there are mechanical entrances and exits with a height of 2.5 m and a width of 2.5 m. 4.2 Supporting Requirements Select a plastic greenhouse film with high light transmittance, good droplet resistance, strong anti-fogging performance, and a thickness of 0.1 mm to 0.12 mm. It should also be equipped with facilities and equipment such as mechanical ventilation and integrated water and fertilizer application. 5 Seedling Requirements 5.1 Variety Selection Select high-quality, high-yielding, disease-resistant, stress-resistant, adaptable, good marketable, and nationally registered pepper varieties. 5.2 Seedling Cultivation Seedling cultivation shall be carried out in accordance with NY/T 2312. 5.3 Indicator of Strong Seedlings For semi-automatic transplanting machines, the seedling height should be 15 cm to 18 cm, with a stem diameter of ≥ 0.4 cm and 5 to 6 leaves; for fully

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