Appendix D. Extracellular enzyme activities on substrates harvested during the first three years of the experiment by substrate (averaged over sites and treatments).

Extracellular enzyme activities on substrates harvested during the first three years of the experiment by substrate (averaged over sites and treatments).

本数据集为实验前三年收获的底物对应的胞外酶活性（Extracellular enzyme activities），按底物类别分类统计，所有数据已在采样样地与实验处理间取平均值。