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以内蒙古鄂尔多斯毛乌素沙地优势灌从沙柳(Salix psammophila)为研究对象,利用其易测指标株高(H)和冠幅直径(D)作为变量,结合实地获取的沙柳地上生物量与地下根系生物量,进行回归分析构建沙柳生物量模型.通过综合对比分析各预测模型的判定系数(R2)、F检验和平均估算误差(AEE)等指标,筛选出沙柳最佳生物量估测模型.沙柳生物量的最优模型为:地上生物量WA=0.326(HD)1.831,地下(根系)生物量WR=0.343(HD)1.497,总生物量WT=0.72(HD)1.660.模型的建立为毛乌素沙地沙柳群落生物量的测定提供了一种简便、实用的方法.
In this paper, the dominant species of Salix psammophila in Ordos Maussane Sandy, Inner Mongolia, China, were selected as research objects. Based on the measured height (H) and crown diameter (D) Root biomass of the Salix psammophila to establish a Salvia miltiorrhiza biomass model.The optimal biomass of Salix psammophila was screened by comprehensively comparing and analyzing the coefficient of determination (R2), the F test and the average estimation error (AEE) of each prediction model, Model.The biomass of Salix psammophila showed the highest biomass (WA = 0.326 (HD) 1.831, subsurface biomass WR = 0.343 (HD) 1.497 and total biomass WT = 0.72 (HD) 1.660) Establishing a simple and practical method for determining the biomass of Salix psammophila community in Mu Us sandy land.