Table 3 Characteristics of the main plant communities in the study area.

Pinus thunbergii

10

6.62

85

Pinus thunbergii

11

8

80

Robinia pseudoacacia

8

9.18

90

Robinia pseudoacacia

6

7.06

95

Vitex negundo var. heterophylla

12

1.55

60

Vitex negundo var. heterophylla

13

1.18

75

Quercus acutissima

9

7.23

90

Quercus acutissima

9

7.68

80

Robinia pseudoacacia- Ziziphus jujuba var. spinosa

13

1.82

75

Robinia pseudoacacia- Ziziphus jujuba var. spinosa

16

4.5

90

Pinus thunbergia- Robinia pseudoacacia

25

8.51

95

Pinus thunbergia- Quercus acutissima

22

7

90

Pinus densiflora

9

7.77

70

Pinus densiflora

6

7.5

60

Pinus thunbergia-

Vitex negundo var. heterophylla

12

1.75

90

Quercus acutissima -Broussonetia papyrifera

26

10

85

Amorpha fruticosa

19

1.47

80

Artemisia argyi

10

8.5

90

Grewia biloba var.parviflora

15

1.37

80

Cleistogenes hancei Keng

19

3.5

80

Quercus acutissima

15

2.7

85

Suaeda glauca

25

12

90

Broussonetia papyrifera

23

3

75

Broussonetia papyrifera

22

8

80

Tamarix chinensis

13

2.5

65

Carex kobomugi

11

0.2

85

Chrysanthemum indicum

15

0.25

80

Suaeda glauca

12

0.15

70