Effect Study of Continuous Monoculture on the Quality of Salvia miltiorrhiza Bge Roots

Figure 1

The HPLC chromatogram of the hydrophilic reference compounds of Salvia miltiorrhiza. The peaks are 1 (danshensu sodium), 2 (rosemary acid), 3 (lithospermic acid), and 4 (salvianolic acid B).