Construction and Application of Forest Vector Sample Plot/Sample Tree Data Model Database in Mountainous and Hilly Areas in South-central Shandong Province
"The survey technology of forest vector sample plot/sample tree"serves as a crucial indicator for accomplishing forest ecological compensation.In order to standardize the indicator of forest ecological compensation,this paper established a regional database of mountainous and hilly areas in south-central Shandong Province by means of data survey precision control,data structure format unification and data-base integrity verification,and analyzed the correlation between DBH(diameter at breast height)and tree height of 18 dominant tree species.There were 23 910 trees belonged to 18 dominant tree species in the study area.Among them,the top ten dominant tree species were Populus nigra,Platycladus orientalis(L.)Franco,Populus tomentosa,Robiniapseudoacacia,Fraxinus chinensis Roxb.,Platanus orientalis,Pinus thunbergii Parl.,Ginkgo biloba L.,Pinus densiflora Sieb.et Zucc.and Sophora j aponica,which the amounts of each species were more than 300 and the total amount was 23 089,that accounting for a-bout 96.57%of the total number of all dominant tree species.The sand volume per hectare of 18 dominant tree species ranged from 51.0 to 140.6 m3,with great difference.Through analysis,there was a strong correlation between DBH and tree height of four dominant tree species,including Quercus acutissima Car-ruth.,P.nigra,G.biloba L.and Pinus tabuliformis Carr.,and the correlation coefficients(R2)were all greater than 0.5.Among them,Q.acutissima Carruth.had the strongest correlation of 0.539 1.The correlation coefficients of P.nigra,P.tabuliformis Carr.and G.biloba L.were 0.525 5,0.523 0 and 0.521 5,respectively.The correlation between DBH and height of other 14 dominant tree species was low.This work provided basic data support for forest resources investigation and monitoring in mountain-ous and hilly areas in south-central Shandong Province,and also offered decision-making support for scien-tific forest ecosystem protection and restoration,supervision and management in this region.
vector sample plotvector sample treedatabase modelmountainous and hilly areas in south-central Shandong Province
万方数据
维普
