Easy and Quick Survey Method to Estimate Quantitative Characteristics in the Thin Forests

M. Mirzaei, A. Bonyad, M. M. Bijarpas, F. Golmohamadi
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引用次数: 1

Abstract

Abstract Acquiring accurate quantitative and qualitative information is necessary for the technical and scientific management of forest stands. In this study, stratification and systematic random sampling methods were used to estimation of quantitative characteristics in study area. The estimator (((E%) 2 xT)) was used to compare the systematic random and stratified sampling methods. 100 percent inventory was carried out in an area of 400 hectares; characteristics as: tree density, crown cover (canopy), and basal area were measured. Tree density of stands was compared through systemic random and stratified sampling methods. Findings of the study reveal that stratified sampling method gives a better representation of estimates than systematic random sampling.Key Words: inventory, systematic random, stratification, zagros forests Received: October 18, 2014. Revised: December 13, 2014. Accepte d: December 16, 2014.Corresponding author: Mehrdad MirzaeiFaculty of Natural Resources, University of Guilan, Someh Sara 1144, IranTel: (98)9187429259, 1344323600, Fax: (98)9187429259, 134432360 0, E-mail: mehrdadmirzaei28@gmail.com
薄林数量特征估算的简易快速调查方法
获取准确的定量和定性信息是林分管理技术和科学管理的必要条件。本研究采用分层法和系统随机抽样法对研究区进行定量特征估计。估计量((E%) 2 xT))用于比较系统随机抽样和分层抽样方法。在400公顷的面积上进行了100%的清查;测量了乔木密度、冠层盖度和基面积等特征。采用系统随机抽样和分层抽样的方法对林分的树密度进行比较。研究结果表明,分层抽样方法比系统随机抽样方法更能反映估计结果。关键词:清查,系统随机,分层,扎格罗斯林修订日期:2014年12月13日。录用日期:2014年12月16日。通讯作者:Mehrdad mirzaei桂林大学自然资源学院,山东萨拉1144,联系电话:(98)9187429259,1344323600,传真:(98)9187429259,134432360,E-mail: mehrdadmirzaei28@gmail.com
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