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

Table 1

Effects of continuous cropping soil on the biomass of S. miltiorrhiza roots ().

Groups	Diameter of main roots (cm)	Length of main roots (cm)	Fresh weight of roots (g)
Control	A	A	A
1-year continuous cropping soil	B	B	B
2-year continuous cropping soil	B	B	C
3-year continuous cropping soil	C	B	D
4-year continuous cropping soil	C	B	E

Note: the values denoted by different letters within the same column represent significant difference at the 0.05 level as compared with various concentration treatment groups.