The potential of NPK fertilizer production line in green agriculture is mainly reflected in the following aspects:

1. Improve fertilizer utilization rate: Through technological innovation, such as precision agriculture technology, nitrogen, phosphorus and potassium fertilizers can be applied more targeted and more effectively, reducing environmental pollution and resource waste caused by excessive use.

2. Optimize fertilizer structure: adjust the ratio of nitrogen, phosphorus and potassium, as well as the nutrient form, to promote more efficient absorption of crops and reduce the burden on the environment.

3. Improve fertilization methods: Adopt efficient fertilization technologies such as water and fertilizer integration and leaf fertilization to reduce fertilizer loss and environmental impact.

4. Environmental policy support: National policies encourage fertilizer reduction and efficiency, such as the "Action Plan for fertilizer Reduction by 2025", which provides policy support and direction for the green transformation of nitrogen, phosphorus and potassium fertilizer production lines.

5. Scientific and technological innovation: Through scientific and technological innovation, such as the improvement of organic fertilizer equipment process, research and development of new fertilizers, etc., to improve the environmental performance and market competitiveness of fertilizers.

6. Market demand: With the increasing demand of consumers for healthy food and environmentally friendly products, the market potential of organic fertilizers and environmentally friendly NPK fertilizers is huge.

To sum up, NPK fertilizer production line has great development potential in green and environmental protection agriculture, through technological innovation, policy support and market demand to promote, can achieve the dual goals of sustainable development of agriculture and environmental protection.