Table 4. The highest point of MAI by major 6 species

Stand age	P. densiflora	L. kaempferi	P. rigida	Q. variabilis	Q. acutissima	Q. mongolica
20	4.123	4.477	3.982	3.946	3.370	3.451
21	4.293	4.697	4.219	4.063	3.472	3.595
22	4.445	4.898	4.424	4.167	3.560	3.717
23	4.580	5.079	4.600	4.257	3.635	3.818
24	4.698	5.241	4.747	4.335	3.699	3.901
25	4.801	5.384	4.867	4.401	3.750	3.966
26	4.890	5.510	4.962	4.455	3.792	4.015
27	4.964	5.619	5.033	4.500	3.824	4.049
28	5.025	5.711	5.084	4.534	3.846	4.070
29	5.075	5.789	5.115	4.560	3.861	4.079
30	5.113	5.852	5.130	4.578	3.869	4.078
31	5.141	5.903	5.130	4.588	3.869	4.068
32	5.159	5.941	5.118	4.592	3.864	4.050
33	5.169	5.968	5.095	4.590	3.854	4.025
34	5.171	5.984	5.062	4.582	3.839	3.994
35	5.165	5.992	5.021	4.569	3.819	3.959
36	5.154	5.990	4.973	4.551	3.796	3.919
37	5.136	5.982	4.920	4.529	3.770	3.876
38	5.114	5.966	4.863	4.504	3.741	3.830
39	5.086	5.944	4.802	4.476	3.709	3.782
40	5.055	5.916	4.738	4.445	3.675	3.732
41	5.020	5.883	4.672	4.411	3.640	3.681
42	4.982	5.846	4.604	4.376	3.603	3.628
43	4.942	5.805	4.536	4.338	3.564	3.576
44	4.899	5.761	4.467	4.299	3.525	3.523
45	4.854	5.713	4.398	4.258	3.485	3.469
46	4.807	5.664	4.329	4.217	3.444	3.416
47	4.759	5.612	4.260	4.174	3.403	3.364
48	4.709	5.558	4.192	4.131	3.362	3.311
49	4.659	5.502	4.124	4.087	3.320	3.260
50	4.608	5.446	4.058	4.042	3.278	3.209