Relationship between plant diversity and soil factors in public welfare forests in Minqin County
The five typical plant communities in the ecological public welfare forest in the desert area of Minqin County,namely,Phragmites communis+Achnatherum splendens,Suaeda glauca+Nitraria tangutorum,Sarcozygi-um xanthoxylon+Nitraria tangutorum,Salsola passerine+Haloxylon ammodendron,Reaumuria songarica+Hal-oxylon ammodendron as research objects,through the field plant community survey and soil sampling,studied the plant community structure,plant species diversity and its relationship with soil factors,the results show that:(1)Minqin County desert area ecological public welfare forests plant species composition is relatively simple,there are only 10 families,19 genera and 22 species,and the Reaumuria songarica+Haloxylon ammodendron community is relatively rich in species composition.The Margalef richness index(R),Simpson's dominance in-dex(D),and Shannon-Wiener diversity index(H')of the Reaumuria songarica+Haloxylon ammodendron commu-nity were the largest among the five plant communities,and the Pielou evenness index(Jsw)of the five communi-ties ranged from 0.55 to 0.99 with no significant difference among the five communities.(2)In terms of soil phys-icochemical properties of the five communities,the Reaumuria songarica+Haloxylon ammodendron community had the smallest soil bulk density and the highest soil organic carbon content.(3)The relationship between the α-diversity index and soil factors was found by Redundancy Analysis(RDA)that the soil bulk density(SBD)and soil organic carbon(SOC)content explained a higher percentage of α-diversity,which were 56%and 14.3%,re-spectively.Therefore,the Reaumuria songarica+Haloxylon ammodendron community has relatively high species richness and relatively good soil physicochemical properties,which can improve the vegetation ecology in the desert area of Minqin County,and is of positive significance for the protection and enhancement of plant commu-nity diversity in the ecological public welfare forests in the desert area of Minqin County.
desert plantsspecies diversitysoil factorsMinqin County
万方数据
维普
