T/NAASS 082-2024 "Double 30" high-yielding cultivation technique for silage corn

Scope

Scope: This document specifies the technical norms for high-yield cultivation of silage corn based on the "Double 30" quality standards, including terms and definitions, variety selection, land preparation, sowing, field management, pest and disease prevention and control, harvesting, and soil fertilization. This document is applicable to the production process of silage corn meeting the "Double 30" quality standards in Ningxia; Main technical content: 3. Terms and definitions: "Double 30" Silage Maize: When harvesting silage corn, the total dry matter content and starch content of the whole plant reach about 30%. 4. Variety selection: Select maize varieties that have been approved, with medium-high stalks, medium-large ears, strong resistance to lodging/breaking, and good leaf retention. 5. Land preparation: - In spring, from late March to early April, prepare the land with appropriate moisture content according to the technical requirements in DB64/T1614-2019 (section 4.2). - Apply 200-300 kg/666.7 m2 of organic fertilizer or 1,000-2,000 kg/666.7 m2 of farmyard manure. - Combine rotary tillage with soil herbicide application 5-7 days before sowing. 6. Sowing: - The optimal sowing period is generally mid-to-late April. Use single-seed precision sowing machines equipped with navigation systems to complete sowing, fertilizer application, and drip irrigation pipe laying in one operation. - Apply seed fertilizer with N 2-3 kg, P2O5 4-6 kg, and K2O 3-5 kg per 666.7 m2. - Adopt a wide-narrow row configuration with narrow rows of 35-40 cm and wide rows of 70-80 cm. In irrigated areas, plant density is 5,500-6,000 plants/666.7 m2; in rain-fed areas, it is 5,000-5,500 plants/666.7 m2. 7. Field management: - For fields where post-emergence herbicide application is ineffective or poorly implemented, conduct chemical weed control during the 3-5-leaf stage of maize. - Water and fertilizer management under drip irrigation: - Apply 9–11 irriga

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