T/YNRZ 029-2022 Active

Scope: This document specifies the technical requirements for the cultivation of high-yield green watermelons, including site environment, land preparation and fertilization, planting, direct sowing, field management, harvesting, waste disposal, and loading and transportation. This document applies to the green high-yield cultivation of watermelons. Main technical content: 1. Terms and definitions: The following terms and definitions apply to this document. 1.1 Double cross training: When the main vine reaches 4-5 leaves, retain the main vine and select a strong side vine at the base, removing the remaining side vines. 1.2 Three cross training: When the watermelon seedlings are 30-40 cm long, select three robust vines as the main stem to grow indefinitely forward, and remove all other branches and small side vines. 1.3 Pressure tendrils: After the vine grows to a certain length and number of nodes, take measures to fix it artificially to prevent it from being broken by strong winds or animals, and promote the growth of adventitious roots to absorb more nutrients. 2. Site environment: Watermelons should avoid continuous cropping. The planting site should be suitable for irrigation and drainage, with a water-land rotation of 3-5 years, and no watermelon crops planted in drylands within 5-7 years. The site should be conveniently accessible, with deep, fertile, and loose soil. The site environment conditions should meet the requirements of NY/T 391, and the soil should comply with GB 15618, while the water quality should meet GB 5084. 3. Seedling cultivation: Seedling cultivation should be carried out in accordance with T/YNRZ 29-2022. 4. Land preparation and fertilization: 4.1 Land preparation: - Before land preparation, remove residual materials from the previous crop. - Before winter planting, plow the soil to a depth of more than 30 cm. - For off-season planting in autumn and winter, sun-dry the soil for about 15 days before plantin