Objective: Change of basic physicochemical properties in rhizosphere soil was studied while fibrous roots of Salviae Miltiorrhizae Radix et Rhizoma were decayed naturally. Method: Contents of nutrient elements were measured by ICP-AES and contents of active ingredients in Salviae Miltiorrhizae Radix et Rhizoma were measured by HPLC. Result: Compared with the control group (CK)

contents of Ca

Fe

K

Zn and N in the treatment 1 group (added fibrous roots of 20 g) decreased by 1.33%

1.95%

0.15%

5.81% and 15.38%;they decreased by 4.10%

3.62%

2.47%

5.81% and 53.85% in the treatment 2 group (added fibrous roots of 40 g)

respectively.Contents of Cu

Mn and P in soil were positively related to the content of tanshinoneⅠ significantly;the content of K was positively related to contents of tanshinoneⅠ and tanshinon ⅡA significantly in the same time;the content of Ca was positively related to dry weight on the ground of Salviae Miltiorrhizae Radix et Rhizoma significantly;the content of Zn was positively related to root fresh weight significantly;the content of Fe was negatively related to the content of rosemary acid significantly. Conclusion: Contents of mineral elements in rhizosphere soil have a certain relation to yield or quality of Salviae Miltiorrhizae Radix et Rhizoma. Fibrous roots decomposition can affect contents of mineral elements in rhizosphere soil of this herb

which is the reason that its yield and quality changed under different treatment.