This file is supplementary material for the literature which was titled with "Synthetic nitrogen fertilizers alter the soil chemistry, production and quality of tea. A meta-analysis". The details including: Table S1 Database structure: numbers of publication and observation of each variable; Table S2 Detail information of the database for this meta-analysis; Table S3 Between-group heterogeneity (Qb) and probability (P value) of soil and tea variables with different experimental factors; Figure S1 Dependences of soil pH responses to soil initial pH (a) and N fertilizer addition levels (b); and Figure S2 Dependences of responses of free amino acids (a) and PP: AA ratio (b) to synthetic N addition levels.