The strategies of organic fertilizer equipment manufacturers to attract investment can include the following:

1. Show market potential: Show potential investors the growth trend and development potential of the organic fertilizer equipment market. The market size is expected to continue to grow, which can serve as a strong argument for attracting investment.

2. Technological innovation ability: show the achievements of the manufacturer in technological innovation and the ability of continuous research and development. Investors tend to invest in companies that can continue to innovate and stay ahead of the curve.

3. Product quality and certification: Provide high-quality products and have relevant quality certification, which can increase investors' confidence in manufacturers' products.

4. Policy support: Emphasize the state's policy support for the organic fertilizer production line industry, such as tax incentives, subsidies, etc. These policies can reduce business operating costs and improve profitability.

5. Marketing: show the manufacturer's marketing strategy and established sales network, as well as its positioning and brand influence in the market.

6. Investment return analysis: Provide detailed financial forecast and investment return analysis, so that investors can understand the potential return and risk of investment.

7. Risk management: Develop a clear risk management strategy and response measures to reduce investors' concerns about potential risks.

8. Successful cases: Share successful customer cases and market feedback to show the actual effect and market acceptance of the equipment.

9. Strategic cooperation and alliance: Establish strategic cooperative relations with other enterprises, form synergies between the upstream and downstream of the industrial chain, and enhance the overall competitiveness of enterprises.

Through the above strategies, organic fertilizer equipment manufacturers can effectively attract the interest of investors and increase the possibility of investment.