Niche characteristics of main herbage populations in Eucalyptus grandis plantation Study on biomass estimation methods of understory shrubs and herbs in forest ecosystem C, N, P stoichiometric characteristics of tree, shrub, herb leaves and litter in forest community of Shaanxi Province, China. Interspecific relationships and ecological species groups of dominant herbage species in Eucalyptus grandis plantation Distribution of Oncomelunia hupensis in various silvi-agricultural ecosystems on river beach Niche and Ecological Response of Herb Layer in Spruce plantation of Qilian Mountains