In the process of growth, corn needs to absorb more nutrients, among which nitrogen fertilizer is the most, followed by phosphate fertilizer and potassium fertilizer. Within a certain range, the yield of corn increases with the increase of nitrogen fertilizer application.
Fertilization of corn should be based on base fertilizer and supplemented by topdressing; organic fertilizer is the main factor, supplemented by chemical fertilizer; nitrogen fertilizer is the main fertilizer in the topdressing, supplemented by phosphate fertilizer and potassium fertilizer. High-yield field topdressing should master the principle that the seedling fertilizer should be light, the jointing fertilizer should be stable, the panicle fertilizer should be heavy, and the grain fertilizer should be supplemented. If the base fertilizer is insufficient, the seedling fertilizer and the jointing fertilizer are the main ones, and the ear fertilizer is supplemented. If the seedlings are good, the topdressing can be light and heavy, and vice versa. For fields with different fertility, balanced fertilization is required. For fields that do not fertilize or fertilize for many years, pay attention to the application of organic fertilizer or compound fertilizer.
Under normal circumstances, the corn field applies 1000-3000 kg of organic fertilizer per mu and a small amount of available nitrogen fertilizer. In the case of 4 to 5 leaves of corn, apply seedling fertilizer, combine the seedlings and seedlings, apply 500 kg of human and animal manure per acre to the water hole, or apply 5 to 7 kg of ammonium sulfate per mu. When the growth cone of corn is elongated, the fertilizer is applied, and 5 to 10 kg of BB fertilizer is applied per acre. The large trumpet period of corn is the period when corn needs the most fertilizer during the growth process. Therefore, in this period, 10 to 15 kg of BB fertilizer per acre is added and 100 g of viable multi-effects. In the early stage of corn silking, the grain fertilizer is applied, which is generally only used for spring corn, and 5 to 10 kg of ammonium sulfate is applied per mu.
Fertilization of corn should be based on base fertilizer and supplemented by topdressing; organic fertilizer is the main factor, supplemented by chemical fertilizer; nitrogen fertilizer is the main fertilizer in the topdressing, supplemented by phosphate fertilizer and potassium fertilizer. High-yield field topdressing should master the principle that the seedling fertilizer should be light, the jointing fertilizer should be stable, the panicle fertilizer should be heavy, and the grain fertilizer should be supplemented. If the base fertilizer is insufficient, the seedling fertilizer and the jointing fertilizer are the main ones, and the ear fertilizer is supplemented. If the seedlings are good, the topdressing can be light and heavy, and vice versa. For fields with different fertility, balanced fertilization is required. For fields that do not fertilize or fertilize for many years, pay attention to the application of organic fertilizer or compound fertilizer.
Under normal circumstances, the corn field applies 1000-3000 kg of organic fertilizer per mu and a small amount of available nitrogen fertilizer. In the case of 4 to 5 leaves of corn, apply seedling fertilizer, combine the seedlings and seedlings, apply 500 kg of human and animal manure per acre to the water hole, or apply 5 to 7 kg of ammonium sulfate per mu. When the growth cone of corn is elongated, the fertilizer is applied, and 5 to 10 kg of BB fertilizer is applied per acre. The large trumpet period of corn is the period when corn needs the most fertilizer during the growth process. Therefore, in this period, 10 to 15 kg of BB fertilizer per acre is added and 100 g of viable multi-effects. In the early stage of corn silking, the grain fertilizer is applied, which is generally only used for spring corn, and 5 to 10 kg of ammonium sulfate is applied per mu.
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