为了构建胡杨冠幅及地上生物量估测模型,在胡杨分布区设置的样地中选取328株样木,以无人机遥感数据提取的胡杨冠幅为自变量,以胡杨生物量模型获取的地上鲜生物量为因变量,通过相关及回归分析方法,构建不同函数形式的估测模型并进行精度分析。结果显示,墨玉县、巴楚县、轮台县,以无人机遥感估测胡杨生物量的最优模型均为三次曲线函数形式,精度分别为94.93%,95.63%,92.24%。研究确定了处于不同林龄胡杨样地的地上生物量的最优估测模型。可见,运用无人机遥感估测生物量是可行的,可为胡杨林的经营管理和生态价值评估提供技术支撑。

The purpose was to construct an estimation model of the crown diameter(CD) of Populus euphratica and aboveground biomass (AGB).328 sample trees were selected from the sample plots of P.euphratica distribution area,and the CD of P.euphratica by unmanned aerial vehicle (UAV) remote sensing data was taken as the independent variable,combined with the aboveground fresh biomass obtained from the P.euphratica biomass model,and,the estimation model of different function forms is constructed and precision analysis is performed through correlation and regression analysis methods.The best models for estimating the biomass of P.euphratica with UAV remote sensing were the cubic functions in Moyu County,Bachu County,and Luntai County.The accuracy was 94.93%,95.63%,and 92.24% respectively.The optimal estimation model for aboveground biomass of different ages of P.euphratica is determined.It was feasible to estimate the biomass by using UAV remote sensing,which provided technical support for the management and ecological value evaluation of P.euphratica.