Y5_3 (CRX2211996)
This study was conducted in August 2023. Using tea plantations of different planting ages (5 and 16 years) in Kaiyang County, Guizhou Province as the research objects, and with adjacent natural vegetation land without tea planting as a control, three 20 m x 20 m quadrats were established in each plantation. Surface soil samples (0-20 cm depth) were collected using the five-point sampling method.