Table 5. Basic information of the sampling plots.

Sample plot	Species	Revegetation year	Revegetation model	Elevation	Tree number	Average DBH (cm)	Average height (m)	Canopy density	Herbage coverage (%)
1	Black locust/Elm	1992	Model A	1375.01	19	17.9	3.9	0.15	35
2	Black locust	1992	Model A	1434.74	8	19.5	2.53	0.4	35
3	Black locust/Chinese pine/Poplar	1992	Model B	1408.68	32	7.8	1.82	0.05	60
4	Black locust/Elm	1992	Model A	1426.78	35	29.4	6.13	0.45	30
5	Black locust/Elm	1992	Model A	1450.05	35	35.3	6.01	0.18	10
6	Black locust/Elm	1992	Model A	1441.66	15	27	4.42	0.4	25
7	Black locust	1992	Model A	1444.1	27	36.2	8.17	0.6	5
8	Black locust/Elm	1992	Model A	1430.54	56	21.7	3.95	0.3	35
9	Black locust	1992	Model A	1402.74	11	26.8	4.6	0.2	25
10	Black locust	1992	Model A	1386.74	19	28.8	5.99	0.55	15
11	Black locust/Elm	1992	Model A	1329.16	32	25	4.82	0.52	35
12	Black locust/Elm/Chinese pine	1992	Model B	1454.21	35	27.5	5.1	0.6	5
13	Black locust/Elm/Ailanthus	1992	Model C	1375.55	28	27.1	7	0.6	20
14	Black locust/Elm	1992	Model A	1450.26	30	28.1	5.83	0.55	8
15	Black locust/Elm/Poplar	1992	Model A	1359.03	11	19	3.67	0.1	40
16	Black locust/Elm	1992	Model A	1344.35	9	24.89	8.49	0.2	40
17	Black locust/Chinese pine/Elm	1992	Model B	1351.54	28	37.6	7.53	0.65	20
18	Black locust	1992	Model A	1438.52	64	23.5	5.5	0.5	30
19	Black locust	1992	Model A	1431.64	75	17.1	6.88	0.4	10
20	Apricot/Chinese pine	1992	Model B	1391.25	160	16.9	3.82	0.85	5
21	Black locust/Elm	1992	Model A	1343.21	19	25.9	4.06	0.5	9
22	Black locust	1992	Model A	1362.8	13	39.9	7.67	0.25	70
23	Chinese pine	1995	Model B	1498.23	20	5.3	21.6	0.25	20
24	Elm/Chinese pine	1995	Model B	1484.46	21	5.16	30.63	0.4	25
25	Elm/Chinese pine	1995	Model B	1514.52	19	4.53	21.5	0.25	21
26	Elm	1995	Model C	1488.11	31	5.75	28	0.3	25
27	Elm	1995	Model C	1485.72	27	6.1	27.55	0.42	35
28	Chinese pine	1995	Model B	1519.56	61	4.34	22	0.4	2
29	Elm	1995	Model C	1457.43	6	5.72	41.4	0.25	28
30	Elm	1995	Model C	1456.52	23	7.33	32.2	0.49	18
31	Elm	1995	Model C	1499.13	40	4.63	28.31	0.62	9
32	Elm/Willow	1995	Model C	1470.44	9	5.28	34.51	0.28	30
33	Elm/Chinese pine	1995	Model B	1440.21	35	3.45	16.46	0.19	8
34	Chinese pine	1995	Model B	1436.4	22	6.18	30.26	0.23	30
35	Elm/Willow	1995	Model C	1426.25	12	5.98	37.2	0.21	21
36	Elm/Chinese pine	1995	Model B	1460.16	8	3.66	17.8	0.31	32
37	Elm	1995	Model C	1421.54	13	6.06	34.35	0.32	41
38	Elm/Willow	1995	Model C	1417.32	24	6.41	29.29	0.2	13
39	Elm	1995	Model C	1429.19	13	2.65	22.82	0.15	51
40	Elm/Chinese pine	1995	Model B	1441.71	52	3.56	24.93	0.42	6
41	Elm/Willow	1995	Model C	1425.86	17	5.73	28.53	0.31	12
42	Elm	1995	Model C	1433.46	9	5.92	37.8	0.15	32
43	Chinese pine	1995	Model B	1416.59	21	3.05	18.43	0.39	23
44	Elm/Chinese pine	1995	Model B	1372.35	14	4.73	34	0.31	36
45	Chinese pine	1995	Model B	1420.87	19	3.24	32.21	0.25	37
46	Elm	1995	Model C	1438.52	51	5	20.8	0.78	9
47	Chinese pine	1995	Model B	1420.34	10	3.86	29.55	0.31	32
48	Elm	1995	Model C	1423.59	90	6.42	21.8	0.3	2
49	Elm/Willow	1995	Model C	1401.69	14	4.98	37.36	0.15	5
50	Chinese pine	1995	Model B	1385.46	13	7.67	39.9	0.25	70