Phosphorus fertilizer use efficiency ranges from 10% to 25%, with the majority of phosphorus remaining in the soil, leading to a long-term residual effect. Studies show that the cumulative application of phosphate fertilizers can last 5 to 10 years, with about 50% of the applied phosphorus still available. Therefore, when phosphate levels are low, it is possible to re-apply after 2 to 3 years of continuous use, as the previously applied phosphorus can still meet crop demands. This helps reduce unnecessary applications and improves overall nutrient use efficiency.
In short, applying phosphate fertilizer effectively requires considering multiple factors, including soil conditions, the type of phosphorus fertilizer used, the specific nutrient needs of crops, and the method of application. It's also important to maintain a balanced ratio between nitrogen and phosphate fertilizers, taking into account their residual effects. Additionally, if the soil lacks potassium or trace elements, these should not be overlooked, as they can become limiting factors for plant growth. By addressing all these aspects, farmers can maximize the efficiency of phosphate fertilizers and promote sustainable agricultural practices.
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