T/CQGFA 01-2004 Organicゞish Production Techniques Handbook

Scope

Main Technical Content: 4. Site Environment 4.1 Climate: Select an agricultural production area with an altitude of 1,200 m to 1,600 m, an average annual temperature of 11 °C to 14 °C; good ecological conditions, sufficient water resources, sufficient sunlight, convenient irrigation and drainage, far from pollution sources, and with sustainable production capabilities. 4.2 Air quality should meet the requirements of GB 3095. 4.3 Irrigation water should meet the requirements of GB 5084. 4.4 Soil environment: Rich in organic matter, a cultivation layer thickness of not less than 20 cm, sufficient water resources, convenient irrigation and drainage, and a pH value of 4 to 6 in paddy fields or swamps. The soil environmental quality should meet the provisions for paddy fields in GB 15618. 5. Cultivation 5.1 Field preparation: The field ridge should be 60 cm to 80 cm high, with a base width of 70 cm and a top width of 35 cm. It should be plowed and leveled, with a plowing depth of not less than 20 cm. Diagonal inlet and outlet pipes should be set up in the field. 5.2 Seed selection: Select 1- to 2-stemmed, healthy, disease-free, and undamaged underground creeping stems or aquatic stems as seed sources from 3- to 6-year-old plants. When using underground creeping stems as seed stems, select yellow or white robust segments; when using aquatic stems as seed stems, select robust, aged segments with green color and root sprouts. Freshly dug seed stems should be planted immediately, and unplanted ones should be soaked in water. 5.3 Planting time: Transplantation can be carried out in spring and autumn, with late March to mid-April being the most suitable period. 5.4 Planting techniques 5.4.1 Planting density: Based on the fertility of the field, plant 2,000 to 6,000 seedlings per 667 m2, with fertile fields planted at 66 cm × 50 cm, medium-fertile fields at 50 cm × 50 cm, and poor fields at 33 cm × 33 cm. 5.4.2 Planting method: Cut each 2 to 3 stem node

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