Maize is a high-yielding crop and requires a large amount of fertilizer. Scientific fertilization is the key to obtaining high and stable yield of corn. According to the law of demand of maize, it is necessary to determine a reasonable method of fertilization and determine the proportion of suitable fertilizer to achieve high-quality and high-yield corn, and achieve maximum economic benefits.
1. Apply base fertilizer and seed fertilizer. Summer corn should be applied before the sowing of basal fertilizer, mainly organic fertilizer, can also use the former buckwheat to directly return the straw to the field, but should apply appropriate amount of nitrogen fertilizer, adjust the carbon-nitrogen ratio, in order to accelerate the maturity of the straw. Fertilizers are mainly available nitrogen, phosphorus and potassium fertilizers, such as diammonium phosphate (5-10 kg per mu) and potassium sulfate compound fertilizer (10-15 kg per mu of 45%).
2. Appropriate dressing is critical. Topdressing plays a decisive role in the growth of corn. Topdressing is dominated by available nitrogen, and phosphorus and potash fertilizers are used according to different growth stages of corn. Usually three times top dressing, namely Miao Fei, jointing fertilizer, panicle fertilizer. Miao Fei should be applied early, accounting for about 10% of the total fertilizer, jointing fertilizer accounted for about 60% of the total fertilizer, panicle fertilizer accounted for about 30%. In addition, during the jointing and booting stages of summer maize, the demand for nitrogen, phosphorus, and potassium are relatively high. Therefore, phosphorus and potassium fertilizer should be applied according to specific conditions.
3. Clever use of leaf fertilizer. Spraying 0.2%-0.3% of potassium dihydrogen phosphate 2-3 times during the jointing stage of corn can increase the yield of corn by more than 10%. Spraying 0.1%-0.3% of zinc sulfate aqueous solution at the seedling stage and jointing stage can prevent corn. White mosaic disease.
4. Be careful with special fertilizers. At present, there are various types of special fertilizers in the agricultural capital market. Many of them are shoddy products. Therefore, care must be taken when purchasing fertilizers and fertilizers. Fertilizers are selected based on the growth characteristics of maize and soil nutrient content.
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