干旱区生态环境知识资源中心(Arid): 腾格里沙漠东南缘4种灌木的生物量预测模型

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	腾格里沙漠东南缘4种灌木的生物量预测模型
其他题名	Biomass Estimation Models of Four Shrub Species at Southeastern Edge of the Tengger Desert
	杨昊天; 李新荣; 王增如; 贾荣亮; 刘立超; 高艳红; 李刚
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2013
卷号	33 期号:6 页码:1699-1704
中文摘要	灌木生物量模型是预测灌木生物量最有效的方法。选择腾格里沙漠南缘荒漠生态系统中常见的4种灌木(驼绒藜(Ceratoides latens)、盐爪爪(Kalidium foliatum)、珍珠猪毛菜(Salsola passerina)、红砂(Reaumuria soongarica))为研究对象,以株高(H)和冠幅(C)的复合因子灌木体积(V)为自变量,通过回归分析,分别构建了4种灌木和混合物种的叶、新生枝、老龄枝、地上部分、地下部分和整株生物量的预测模型。通过决定系数(R~2)、估计值的标准误(SEE)和回归检验显著水平(p<0.05)筛选出了最优的生物量估测模型。结果显示:4种灌木的生物量模型主要以幂函数W =aV~b为最优模型,少数以三次函数W =a+bV+cV~2+dV~3为最优模型。灌木生物量与V 之间呈极显著的相关关系(p<0.001),决定系数较高,分别为:叶片(0.775
英文摘要	Biomass estimation modeling is one of the most important methods in biomass estimation of shrubs. In this paper, shrubs volume (V) was used as independent variable to establish the models between Vand the leaf, current year branch, aging branch, above-ground, under-ground and total biomass for four single common shrubs and their mixed samples in desert area, respectively, at the southeastern edge of the Tengger Desert, China. The optimal models were selected according to the largest determination coefficient (R~2), the smallest standard error of estimate (SEE) and significance level (p < 0.05). Results showed that the optimal biomass models for all organs, above-ground, under-ground and the whole plant of single species and mixed species were mostly expressed by power functions (W =aV~b), only a few can be expressed by cubic equations (W =a+bV+cV~2+dV~3). The p values of all models reached a significant level (p < 0.05) and R~2 ranged between 0.69-0.92.Those models can be used to estimate actual biomass of shrubs due to their good effectiveness. However, there existed differences in optimal models among different species or organs. Models should be chosen according to the practical conditions in estimating biomass of shrubs. The effects of mixed models are lower than that of single species. The optimal biomass models are expected to contribute to estimate biomass and carbon storage of different carbon pools for desert ecosystems.
中文关键词	灌木 ; 生物量 ; 预测模型 ; 荒漠地区 ; 腾格里沙漠南缘
英文关键词	shrubs biomass estimation model desert ecosystem southeastern edge of the Tengger Desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4995012
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230673
作者单位	中国科学院寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	杨昊天,李新荣,王增如,等. 腾格里沙漠东南缘4种灌木的生物量预测模型[J]. 中国科学院西北生态环境资源研究院,2013,33(6):1699-1704.
APA	杨昊天.,李新荣.,王增如.,贾荣亮.,刘立超.,...&李刚.(2013).腾格里沙漠东南缘4种灌木的生物量预测模型.中国沙漠,33(6),1699-1704.
MLA	杨昊天,et al."腾格里沙漠东南缘4种灌木的生物量预测模型".中国沙漠 33.6(2013):1699-1704.