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Scientific fertilization is an important link to capture the high yield and high quality of waxy corn. According to the fertilizer requirement of waxy corn and the production practices of Nanhui, Fengxian, Qingpu and other districts and suburbs in Shanghai suburbs, the following principles should be mastered in the fertilization of waxy corn (mainly in spring seedling transplanting): base fertilizer, supplemented with topdressing; organic Fertilizer-based, supplemented by chemical fertilizers; foot-based fertilizer, staged topdressing.
1. Base fertilizer Base fertilizer refers to the fertilizer applied before transplanting. The amount of fertilizer per acre is 1500kg of decomposed organic fertilizer (chicken manure, pig manure, etc.). Organic fertilizers should be applied as early as possible, and should be applied in combination with deep ploughing during winter ploughing. On the basis of the application of organic fertilizer, about 60 kg of compound fertilizer per acre (35 to 40% of the total fertilizer application) is applied per acre before the transplanting.
2, topdressing, topdressing, fertilizer, and fertilizer. Jointing fertilizer: Spring corn enters the jointing stage when the leaves are 7-8 pieces of leaves. At this time, the tassels and ears will also differentiate, and the requirements for nutrients are increasing. Therefore, the jointing fertilizer is timely applied to promote the waxy corn. It is very important to grow the vegetative growth and build a shelf. In general, joint fertilizer accounts for about 15% to 20% of the total fertilizer use. At this time, about 20 kg of ammonium bicarbonate can be applied per acre.
3, panicle fertilizer: the application period of panicle fertilizer, generally in the leaf age 13 pieces when the leaves are most suitable for application. The amount of panicle fertilizer accounts for about 35% of the total amount of chemical fertilizer. It is recommended to use quick-acting nitrogen fertilizer, which can be combined with medium tillage application. Generally, 15-17 kg of urea is applied per acre.
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High-yield fertilization technology for waxy corn
Waxy corn is a crop that requires more fertilizer. The nutrients absorbed in its lifetime are the most nitrogenous, followed by potassium and phosphorus. Generally, for every 100 kg of waxy corn kernels, about 2.55 kg of nitrogen, 0.98 kg of phosphorus, and 2.49 kg of potassium are required. Production can be used as the basis for the planned yield indicators, and appropriate adjustments should be made according to local production conditions to formulate fertilization plans.
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