In order to understand the herbage biodiversity and synusia structure of artificial forest

we investigated herbages under five forest types of Populus simonii(PS)

Prunus armeniaca(PA)

Prunus davidiana(PD)

Hippophae reamnoides(HR) and Caragana korshinskii(CK).In the 37 herbaceous species identified

only 18

25

20

25 and 17species were present in the PS

PA

PD

HR and CK forests

respectively.For herbages

Stipa bungeana

Arthraxon hispidus

Potentilla multifida and Thymus mongolicus were common in the five plantations.The average coverage

height and biomass of herbages in five artificial forests were different obviously

but community biodiversity was similar.In conclusion

low biodiversity and limited structure development(coverage

height

biomass) under five artificial forests indicate that the environments under artificial plantations are very bad and affect herbage individual development and community structure.Results show that the best herbage community has developed under the Prunus armeniaca forest with a relatively open canopy and low tree density

which suggests that the measures of tree thinning and canopy pruning to keep reasonable density are crucial for promoting artificial forest development

and improving herbage biodiversity and community structure.