By using the data of area and main tree species of Guizhou province from 2000 to 2007,and eight different scenarios have been schemed for the annual area of GGP-forests during 2008~2010 and harvest options.

Study on interspecific association of main populations in arborous layer of nature forest in Wuyishan Scenery District;

Variance analysis, X~2 test, Ochiai index, Dice index and Jaccard index, which are based on 2×2 contingency table, were used to study the inter-specific association of 19 main populations of Alsophila spinulosa community in Mopan Gully, Fuling, Chongqing.

Population spatial distribution pattern of 15 main populations of stand layer and undergrowth in Cycas fairylakea community was investigated,in order to discuss the structure and succession direction and provide scientific foundation for the protection of C.

The frequency distribution models,Taylor exponential equation,and Iwao s x *- method are used for analyzing the spatial patterns of four main trees in South-subtropical secondary broad-leaf forest.