Leaf area index estimated by direct, semi-direct, and indirect methods in European beech and sycamore maple stands

作     者：Jakub Cerny Pavel Haninec Radek Pokorny Jakub ?ernyé;Pavel Haninec;Radek Pokornyé

作者机构：The Forestry and Game Management Research InstituteResearch Station at OpocnoNa Olive 55051773 OpocnoCzech Republic The Department of Silviculture and Forest EstablishmentFaculty of Forestry and Wood TechnologyMendel UniversityZemedelska 361300 BrnoCzech Republic 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2020年第31卷第3期

页      面：827-836页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0907[农学-林学] 07[理学] 0829[工学-林业工程] 0901[农学-作物学] 0713[理学-生态学] 

基　　金：supported by the Specific University Research Fund of the Faculty of Forestry and Wood Technology(FFWT)at Mendel University in Brno(Grant No.LDF_VP_2016017) the Ministry of Agriculture of the Czech Republic,institutional support MZE-RO0118 

主　　题：Leaf area index Specific leaf area Litter trap Needle technique LAI-2000 PCA 

摘      要：Leaf area index(LAI)is one of the most important characteristics of forest stands that affects the fundamentals of tree physiological processes,biomass production,and mechanical *** LAI results obtained by the semi-direct and indirect methods(the needle technique and an LAI-2000 PCA)in three European beech(Fagus sylvatica L.)stands and one sycamore maple(Acer pseudoplatanus L.)stand were compared with LAI estimated by litter traps during the 2013 growing *** LAI was estimated using an LAI-2000 PCA which showed similar trends among the stands and strongly corresponded to phenological phases of deciduous stands in Europe,with the fastest rate of leaf area increment occurring during the first month following bud *** the growing season,maximum stand LAI value was on June 19th and reached 4.5–5.1,and 4.0 in the beech and maple stands,*** needle technique significantly underestimated(p05)LAI on average by 15.1%and 5.8%in the beech and maple stands,*** methods for LAI estimation at the stand level could be applicable in deciduous forest stands(beech,maple)with similar site and stand ***,calibration by direct method is necessary to obtain the required precision.