王勤耕(2001)、闫雁(2004)、Klinger et al. (

Wang Qin Geng (2001), Yan Yan (2004), Klinger et al. (2002) study, the average leaf are used in biomass density method, the vegetation is rough divided into several categories, such as coniferous forest, broad-leaved forest etc., each select a type of vegetation average leaf biomass density, the classification method is too simple and uniform vegetation, regions and time difference does not reflect leafy biomass; and from observation and limited research literature values.

In the studies of Wang Qintao (2001), Nidi (2004), Klinger et al. (2002), the average leaf biomass density method was used to divide the vegetation into several categories, such as conifer forests, broad-leaved forests, etc., and each vegetation type selected an average leaf biomass density. The classification of vegetation by this method is too simple and homogenized, and does not reflect the regional and time differences of leaf biomass, and comes from limited literature observation and research values.

In the study of Wang Qingeng (2001), Yan Yan Yan (2004) and Klinger et al. (2002), the average leaf biomass density method was used to divide the vegetation into several categories, such as coniferous forest and broad-leaved forest. One average leaf biomass density was selected for each vegetation type. The classification of vegetation by this method was too simple and uniform, which did not reflect the regional and time differences of leaf biomass; and it originated from Limited literature observation and research value.