摘要
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.
Salix psammophilais the dominant shrub in Maowusu sandland at Ordos.In current study,the plant height（H）and crown diameter（D）of Salix psammophila were measured,combined with above-ground biomass and root biomass,to conduct regression analysis and establish biomass estimating models.Then the determine coefficient（R^2）,F test results and average estimated error（AEE）of each estimating model were compared to get the optimum ones,which were：1）above-ground biomass WA=0.326（HD）1.831;2）under-ground biomass（root）biomass WR=0.343（HD）1.497;3）total biomass WT=0.72（HD）1.660.These models provide a simple but practicable method to measure the community biomass of Salix psammophilain Maowusu sandland.
出处
《内蒙古大学学报（自然科学版）》
CAS
北大核心
2015年第3期256-261,共6页
Journal of Inner Mongolia University：Natural Science Edition
基金
国家环保公益性行业科研专项(201109025-03)
关键词
沙柳
生物量估测模型
回归方程
毛乌素沙地
Salix psammophila
biomass estimating model
regression equation
Maowusu sandland
