raw experimental data

Here we established a long-term (3-year) field experiment of no fertilization (CK), organic fertilizer + chemical fertilizer + sprinkler irrigation (T1), chemical fertilizer + sprinkler irrigation (T2), chemical fertilizer treatment (T3) and leguminous green manure (soybean) + chemical fertilizer + sprinkler irrigation(T4).The data of soil physicochemical properties and enzyme activities were collected, and the stoichiometric data of nutrients and enzymes were calculated according to the formula.Excel 2019 and SPSS 27.0 software were used for statistical analysis. The Kolmogorov-Smirnov method was used to test the normal distribution of data. For data that were normally distributed, one-way ANOVA and least significant difference were applied. For non-normally distributed data, Dunett's T3 method was used. To assess the relationships among soil properties and their relation to soil enzyme activity, Spearman’s correlation analysis was conducted using the “corrplot” package of R. Canoco 5 (version 5, Microcomputer Power, Ithaca, NY, USA) was used for redundant analysis (RDA) of soil physicochemical properties and soil enzyme activity. Graphics were conducted by Origin 2024. Data are presented as mean ± standard deviation.