1. Improper maintenance of equipment: If the equipment is not properly maintained, it may lead to an increase in the failure rate, which affects the production speed. The absence of a routine preventive maintenance schedule can lead to functional failures and increased downtime.

2. Insufficient technical update: If the technical update of the production line is not timely, it may lead to low production efficiency. Integrating modern technology can optimize production efficiency, but it requires capital investment and training, which may affect production speed in the short term.

3. Overcapacity and production disconnect: there may be overcapacity problems in fertilizer production, especially the blind expansion of nitrogen and phosphate fertilizer production capacity, resulting in a disconnect between production and demand, affecting production efficiency.

4. Supply chain disruption: Disruption of raw material supply chain may lead to production delays and affect production speed.

5. Process design problems: The production line built earlier may not have special equipment, resulting in normal production affected. In addition, the process design may not meet the multi-variety development requirements, limiting the flexibility and efficiency of the production line.

6. Energy consumption and resource waste: The production of new fertilizers is mostly the secondary processing of traditional nitrogen fertilizer, phosphate fertilizer, potash fertilizer or compound fertilizer, which has problems of large energy consumption, resource waste, high cost and low productivity, restricting large-scale industrialization.

To solve these problems, it is necessary to comprehensively consider many aspects such as organic fertilizer equipment maintenance, raw material management, environmental compliance, technology integration and supply chain management to improve the production speed of nitrogen, phosphorus and potassium fertilizer production lines.