T/CMWHLZ 002-2024 Cultivation Technical Regulations for Grafting Seedlings of Non-nuclear Lychee in Chengmai County

Scope

Main Technical Content: 4. Selection and Planning of Nursery Sites 4.1 Selection of Nursery Sites 4.1.1 Annual average temperature: 21°C–23°C; annual average sunshine duration ≥1900 hours; annual average rainfall 1600mm–1800mm. 4.1.2 Preferably select conveniently accessible sites with sufficient water resources, convenient irrigation and drainage systems, and sheltered, sunny slopes or flatlands as nursery sites. The environmental quality of the nursery sites shall comply with the requirements of NY/T 5010. 4.2 Nursery Planning According to the scale and topography of the nursery site, plan road systems (main roads and branch roads), irrigation and drainage systems, shade shelters, and production management facilities. Nursery construction shall comply with the requirements of LY/T 1185. 4.3 Nursery Construction 4.3.1 Nursery site preparation - Plow, sun-dry, and level the nursery soil, removing weeds and grass roots. - Construct raised beds 1 m wide and 20 cm–25 cm high. - Dig drainage ditches 25 cm–30 cm deep and 35 cm–45 cm wide around the nursery. - Apply 1000 kg–1500 kg of composted organic fertilizer and 75 kg of superphosphate as base fertilizer per 666.7 m2 nursery bed, mixing thoroughly with the fine soil before leveling the beds. 4.3.2 Road and drainage system setup - Construct a 5 m wide (shoulder width 30 cm) main road along the nursery perimeter. - Build 3 m wide (shoulder width 20 cm) branch roads perpendicular to the main road, connecting to form four equal-sized zones. - Divide each zone into rectangular subzones, with dimensions typically 100 m × 35 m. - Construct 15 m wide (shoulder width 10 cm) working paths connecting subzones and branch roads. - Erect shade shelters within subzones for seedling cultivation. - Dig 60 cm–80 cm deep and 60 cm–80 cm wide main drainage ditches along the main road, connected to water reservoirs (ponds). - Dig 30 cm–40 cm deep and 40 cm–50 cm wide branch drainage ditches along b

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