Analysis of the Relationship between Populus euphratica’s Volume and DBH in Alar

Abstract

Populus euphratica plays an important role in the ecological balance of desert areas. In order to provide references for the afforestation design and management of Populus euphratica, we studied the relationship between Populus euphratica’s volume and DBH in Alar. We have measured the volume, DBH, tree age and other indicators of 78 strains of Populus euphratica in Alar region, and distributed the modeling samples and test samples in accordance with the order of tree age from small to large. So the modeling sample contains 59 individuals, and test samples contain 19. For modeling samples, we obtained the optimal regression model between the volume and DBH by SPSS software. For the test samples, the overall relative error of the model is -4.81%, the average relative error is -4.29%. The accuracy is so high that the regression model can be used to estimate the volume of Populus euphratica.