基于易测因子的塔里木河下游柽柳(Tamarix chinensis)灌丛地上生物量模型

doi:10.7522/j.issn.1000-694X.2015.00081

摘要/Abstract

摘要： 根据塔里木河下游英苏至阿拉干断面各个监测井附近柽柳（Tamarix chinensis）标准枝生物量实测数据，采用数理统计方法构建柽柳单枝和单丛地上生物量估测模型，在精确度检验的基础上筛选出最佳模型，并对模型估测值与实测值进行卡方检验。结果表明：以柽柳枝基径d和枝长h派生因子d²h为自变量建立的估测模型M_a=0.123（d²h）^1.241（R²=0.844）最优，估测精度为76.93%；分别以冠幅面积S和丛高H双变量SH、冠幅面积单变量S为自变量建立的柽柳地上生物量估测最优模型为M_b=1.335（SH）^0.806（R²=0.788）、M_c=0.924S^1.289（R²=0.771），估测精度分别为76.04%、72.83%。对上述模型估测值和实测值进行卡方检验，结果表明两者无显著差异，模型可用于塔里木河下游柽柳地上生物量估算。

关键词: 柽柳(Tamarix chinensis), 地上生物量, 回归模型, 塔里木河

Abstract: Based on the measured single branch weight of Tamarix chinensis from Yingsu to A'lagan Section, mathematical statistics methods were applied to establish the aboveground biomass estimation models. The best estimation models for each of them were picked out based on accuracy test, and then the significance of the difference between estimated value and measured value was tested according to Chi-square test. The result shows that the model, M_a=0.123(d²h)^1.241(R²=0.844; M_a, d and h refer to single branch biomass, basal diameter and length of branch, respectively), which by using d²h as independent variable was best to estimate the biomass of single branch, the accuracy of it was 76.93%. M_b=1.335(SH)^0.806(R²=0.788) and M_c=0.924S^1.289(R²=0.771)were single cluster biomass estimation models of T.ramosissma, they were built taking crown area, crown area and height as independent variables respectively, whose estimation accuracy was 76.04%, 72.83%. The differences between measured value and estimated value of all three biomass estimation models above were analyzed by Chi-square test, the result shows that there were no significant differences between them.

Key words: Tamarix chinensis shrub, aboveground biomass, regression model, Tarim River

中图分类号:

TM938.84

白玉锋, 陈超群, 徐海量, 杜清, 张广朋. 基于易测因子的塔里木河下游柽柳(Tamarix chinensis)灌丛地上生物量模型[J]. 中国沙漠, 2016, 36(4): 1014-1020.

Bai Yufeng, Chen Chaoqun, Xu Hailiang, Du Qing, Zhang Guangpeng. Aboveground Biomass Models Based on the Easy-to-measure Factors of Tamarix chinensis Shrub in the Lower Reaches of the Tarim River[J]. JOURNAL OF DESERT RESEARCH, 2016, 36(4): 1014-1020.

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