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Functional fertilizers are not just sources of nutrients for vegetables, but also provide additional benefits such as promoting root development, enhancing plant resilience, and improving disease resistance. As a result, many vegetable farmers turn to functional fertilizers when their crops face specific issues, often achieving noticeable improvements. However, during an interview with farmers in Gucheng Street, Shouguang City, several of them raised a common concern: why do functional fertilizers work well at first, but gradually lose effectiveness when used continuously on their own?
The answer lies in the way these fertilizers function. Initially, when farmers start using functional fertilizers, the soil already contains sufficient nutrients from previous applications, so the functional fertilizer helps enhance nutrient uptake and utilization by the plants. This leads to visible improvements in growth and overall plant health.
However, over time, if functional fertilizers are used exclusively without being combined with water-soluble or compound fertilizers, the levels of essential nutrients like nitrogen, phosphorus, and potassium in the soil may decline. This is because most functional fertilizers contain only minimal amounts of mineral nutrients. As a result, even though the functional fertilizer may still have some beneficial effects, it cannot fully meet the growing nutritional needs of the plants. Consequently, the effectiveness of the functional fertilizer diminishes, and farmers may notice that their crops are not performing as well as before.
To avoid this issue, it's recommended that farmers use functional fertilizers in combination with other types of fertilizers to ensure a balanced supply of nutrients. This approach not only maintains the benefits of functional fertilizers but also supports long-term healthy growth of the crops. Farmers should be aware of this and adjust their fertilizer strategies accordingly to achieve consistent and sustainable results.