Table 1 Comparison of the yield (t/ha) of R. tanguticum at different ages at the same experimental site

2

17.76 ± 1.04 c

10.84 ± 0.93 b

7.05 ± 0.51 b

3.64 ± 0.28 c

0.75 ± 0.13 c

3

57.97 ± 3.91 bc

36.48 ± 1.83 b

56.11 ± 4.01 a

22.94 ± 1.83 bc

11.97 ± 1.38 bc

4

91.05 ± 5.54 ab

75.98 ± 5.71 a

64.86 ± 4.03 a

31.54 ± 1.48 ab

26.05 ± 1.96 ab

5

102.01 ± 7.14 a

78.87 ± 4.01 a

62.44 ± 3.33 a

42.84 ± 2.16 a

41.69 ± 2.14 a