Study on the character of sown grassland community and their diversity in MaQu
The paper studied the community characteristics of sown grassland (oats with one year,Elymus with two years),natural rangeland and abandoned cropands,The results showed that the dominant species in the natural rangeland were Poa pretensis 、Elymus dahuricus ,the dominace index were 0.798 and 0.627 respective-ly.The weeds in oats land were Elsholtzia ciliate ,Galium verum and Microula sikkimensis ,the dominace index were 0.204,0.142,0.082,respectively.In the Elymus land with two years,the proportion of weeds biomass ac-counted for more than 6% of the total biomass of the vegetation community,the weeds must be controlled prop-erly.In the abandoned land,the aboveground biomass were reduced from 839g/m2 to 62 g/m2 ,and the produc-tion capacity was low.The abandoned land must be fenced for protection.There was a significant correlation be-tween the plant diversity index and evenness index(P <0.01),there was positive correlation between the plant diversity index and plant species richness(P <0.05 ),there was a significant correlation between plant species richness and evenness index(P <0.01).
alpine meadowsown grasslandplant-diversityMaqu County
NETL
NSTL
万方数据
维普
