Position: Home > Articles > Sample Collection Approach for Modeling of Single-Tree Biomass Equations
Central South Forest Inventory and Planning
2010,29
(2)
1-6
立木生物量建模样本数据采集方法研究
作 者：
曾伟生
单 位：
中国林业科学研究院森林资源信息研究所
关键词：
立木生物量建模;样本采集;分层抽样;地上生物量;粗根生物量
摘 要：
开展全国森林生物量监测和评估,建立适合较大区域范围的通用性立木生物量模型将成为必然趋势。从建立全国立木生物量模型的实际需求出发,对建模样本数据的采集方法进行专题研究。首先,在文献调研的基础上,对国内外相关研究和应用现状进行了综述。然后,结合大范围应用的实际情况,提出立木生物量建模样本的数据采集方法,其中:树干按上、中、下3个部分测量鲜重,再分别在1/10、3.5/10、7/10树高处各取2个圆盘样品测含水率;树冠分上、中、下3层测量鲜重,并分层各抽取3个标准枝测定枝、叶比例,再在各层标准枝(不含叶)和全部标准枝的树叶中抽取含水率测定样品;树根按全挖法测定鲜重,再分树蔸(树桩)、粗根(≥10 mm)、细根(<10 mm)抽取含水率测定样品。最后,提出样本数据处理和计算的有关方法。研究成果为全国立木生物量建模样本采集提供技术依据。
译 名：
Sample Collection Approach for Modeling of Single-Tree Biomass Equations
作 者：
ZENG Weisheng(Institute of Forest Resources Information,Chinese Academy of Forestry,Beijing 100091,China)
关键词：
single-tree biomass equation modeling;sample collection;stratified sampling;above-ground biomass;coarse root biomass
摘 要：
To implement monitoring and assessment of national forest biomass,it is becoming the trend to develop generalized single-tree biomass models suitable for large-scale forest biomass estimation.The sample collection approach for modeling of single-tree biomass equations was studied in this paper.Firstly,based on the review of related literatures,the methods of sample collection in field and dry-weight measurement in laboratory were summarized.Secondly,considering the situation being applied all over the country,the sample collection approach was presented: the stem being weighted by three(lower,middle,and upper) sections,and 2 disks being selected from the trunk on each point of 1/10,3.5/10,7/10 tree height for moisture content measurement;the crown being weighted by three(lower,middle,and upper) layers,and 3 standard branches being selected in each layers to determine the leafless branch/foliage ratio,and sub-samples being selected from the standard branches(not including foliage) in each of the three layers and from the foliage of all three layers for moisture content measurement;the roots being excavated wholly and weighted,then sub-samples being selected from stump,coarse root(≥10 mm),and fine root(<10 mm) respectively.Finally,the method of data processing and computation was provided.The approach was recommended to be technical guidelines for the sample collection for modeling of generalized single-tree biomass equations in China.
相似文章
-
全国立木生物量建模总体划分与样本构成研究 [曾伟生, 唐守正, 黄国胜, 张敏] 林业资源管理 2010 (3) 16-23
