详细信息
海南沿海木麻黄可加性生物量模型 被引量:6
Additivity in Tree Biomass Models of Casuarina equisetifolia in Hainan Province
文献类型:期刊文献
中文题名:海南沿海木麻黄可加性生物量模型
英文题名:Additivity in Tree Biomass Models of Casuarina equisetifolia in Hainan Province
作者:杨众养[1] 薛杨[1] 刘宪钊[2] 王小燕[1] 林之盼[1]
第一作者:杨众养
机构:[1]海南省林业科学研究所;[2]中国林业科学研究院资源信息所
年份:2015
卷号:43
期号:1
起止页码:36-40
中文期刊名:东北林业大学学报
外文期刊名:Journal of Northeast Forestry University
收录:CSTPCD;;北大核心:【北大核心2014】;CSCD:【CSCD_E2015_2016】;
基金:林业公益性行业科研专项(201304320);琼北文昌生态定位站运行项目
语种:中文
中文关键词:木麻黄;可加性生物量模型;海南省
外文关键词:Casuarina equisetifolia; Additivity biomass model; Hainan
分类号:S718.54
摘要:利用幂函数和指数函数中6种数学模型,共得到木麻黄单木各器官生物量估算模型24个。结果表明:以幂函数为基础的模型拟合效果较好,综合模型拟合精度以模型W3=a DbHc的拟合效果最好。以选择的最优模型为基础,建立木麻黄生物量可加性模型,该可加性模型的拟合精度较高,R2值基本大于0.9。由于各部分生物量之间存在着一定的相关性,利用联立估计法,建立的木麻黄可加性生物量模型,能够减少系统误差所带来的估计偏差,提高参数估计的有效性和一致性,为海南木麻黄可加性生物量估计提供了一种方法。
We used power equations and exponential to establish the relationships between independent variables and biomasses of each component in Casuarina equisetifolia,summing up to 24 equations. The power equations were the best models. Considering model precision and RMSE values,Model 3 was the best one between three power models. With the Model 3,we developed the additivity biomass models of C. equisetifolia. The model got a good performance,and most of R2 values were bigger than 0.9. Because of inherent correlation among the biomass components measured on the same sample trees,the parameter values had no obvious estimation biases with SUR method,and the precision of parameter estimation was raised as well as the improvement of additivity.
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