Research On The Species Diversity And Biomass Of Understory In Honda Plantation In Xinghe County Of Inner Mongolia

This thesis takes the understory of Honda Plantation in Xinghe Country of Inner Mongolia as object,and adopts quadrat method to research Pinus tabuliformis Carr.Plantation and Pinus sylvestris L.var.mongolica Litv.Plantation with different forest stands.It researches the impact of forest stand and environmental factors on species diversity and biomass of understory.The main methodologies are correlation analysis,multiple comparison.The significant conclusions are showed below:(1)The thesis conducts investigation on understory of Pinus tabuliformis Carr.Plantation and Pinus sylvestris L.var.mongolica Litv.Plantation with different forest stands in Xinghe Country,thus concludes:there are 20 families,44 genera and 55 species of specie numbers of understory in Pinus tabuliformis Carr.Plantation.The most 3 widespread families are:Gramineae family,Asteraceae family and Leguminosae family.There are 17 families,38 genera and 45 species of specie number of understory in Pinus sylvestris L.var.mongolica Litv.Plantation.The most 3 widespread families are are:Asteraceae family,Gramineae family and Leguminosae family.Artemisia Linn.is the advantaged genus of understory between the two Plantations.It can be indicated that the number of understory increases with the tree age through the data.(2)There are Margalef index,Shannon-Wiener index,Simpson index and the aboveground biomass between Pinus tabuliformis Carr.Plantation and Pinus sylvestris L.var.mongolica Litv.Plantation in Xinghe.It can be shown that all four index increases with tree age.There is an remarkable positive correlation correlativity in the Margalef index,Shannon-Wiener index,Simpson index and the aboveground biomass,While there is no extremely remarkable positive correlation correlativity with uniformity of the Pielou index.(3)It can be indicated that aspect and slop Gradient have a significant effect on the Margalef index,Shannon-Wiener index and Simpson index in Plantation in Xinghe Country,not on the Pielou index and aboveground biomass.In the Plantation with different aspect and slope gradient,the Margalef index,Shannon-Wiener index and Simpson index are shown as shady slope>sunny slope>flat slope,and gentle slope>incline slope>flat slope.(4)It can be shown that Margalef index,Shannon-Wiener index,Simpson index and the aboveground biomass of understory in Plantation of Xinghe Country are obviously linear positive correlation correlativity in dingle country.