Biochar-induced enhancement of soil available phosphorus shows pronounced temporal dynamics in subtropical Chinese fir plantations

Key Points

• Soil available phosphorus significantly increased after biochar application, impacting plant growth.
• The enhancement peaked at 6 months, indicating pronounced temporal dynamics in phosphorus availability.
• Assessment using soil samples from multiple plantations over a year provides comprehensive insights into biochar effects.
• This research highlights biochar's potential in sustainable agriculture but requires further exploration in varied climates.