| In order to solve the problem of soil environmental degradation of continuous cropping of Angelica sinensis, three tillage methods were set up with traditional tillage with 20 cm soil depth as the control (CK), and three tillage methods, namely deep tillage with 40 cm (T1), subsoiling tillage with 50 cm soil depth (T2) and subsoiling tillage with 60 cm (T3), to study the effects of different tillage methods on soil physicochemical properties, yield and quality of Angelica sinensis. The results showed that: (1) Compared with CK, T1, T2 and T3 treatments could effectively reduce the soil bulk density of 0~60 cm soil layer and improve porosity and water content. (3) The results of principal component analysis showed that the soil quality was the best in T2 treatment. (2) T1, T2 and T3 treatments could reduce pH and increase the contents of organic matter, total phosphorus, available phosphorus and available potassium, and the contents of total phosphorus, available phosphorus and available potassium were relatively high in 0~20 cm soil layer. (3) The results of principal component analysis showed that the soil quality of T2 treatment was the best. (4) The T2 treatment had the highest concentrations of fresh yield, dry yield, extract, ferulic acid and ligustilide in Angelica sinensis, which were 114.70%, 110.05%, 24.33%, 14.44% and 38.14% higher than those of CK treatment, respectively. In conclusion, both deep ploughing and subsoiling tillage can effectively improve the soil quality of the cultivated layer of Angelica sinensis continuous cropping land, and increase the yield and quality of Angelica sinensis, and the effect of subsoiling tillage with 50 cm soil depth is the best. |