Technical methods for phosphorus and potassium fertilizer management for high-yield maize
The effect of applying phosphorus and potassium fertilizers varies greatly depending on the soil's available nutrient content. Increasing the application of phosphorus and potassium helps produce strong seedlings that emerge early, strong plants with large ears, a higher grain-to-leaf ratio, and more grains and greater grain weight, and is an important condition for improving population quality. However, after phosphorus and potassium fertilizers are applied, most are absorbed and fixed by the soil, the absorption and utilization rate in the current season is low, and in the soil...
The effect of applying phosphorus and potassium fertilizers varies greatly depending on the soil's available nutrient content. Increasing the application of phosphorus and potassium helps produce strong seedlings that emerge early, strong plants with large ears, a higher grain-to-leaf ratio, and more grains and greater grain weight, and is an important condition for improving population quality. However, after phosphorus and potassium fertilizers are applied, most are absorbed and fixed by the soil, the absorption and utilization rate in the current season is low, their mobility in the soil is poor, and they are not easily lost; their fertilizer effect lasts for as long as several years. Therefore, to improve the absorption and utilization rate of phosphorus and potassium fertilizers in the current season, a single application should be applied as a base fertilizer in the sowing furrow, as this gives the best effect, is conducive to maize absorption and utilization, and promotes the formation of high yield. Studies have shown that applying phosphorus fertilizer at sowing time increased yield by 8.5%, 13.7%, and 14.8% compared with application at the 3-leaf, 6-leaf, and 9-leaf stages, respectively; applying potassium fertilizer at sowing time increased yield by 2.1%, 5.1%, and 11.6% compared with application at the 3-leaf, 6-leaf, and 9-leaf stages, respectively.