{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T18:54:25Z","timestamp":1777661665784,"version":"3.51.4"},"reference-count":23,"publisher":"FapUNIFESP (SciELO)","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rev. \u00c1rvore"],"published-print":{"date-parts":[[2016,10]]},"abstract":"<jats:p>ABSTRACT Leaf area index (LAI) is an important parameter controlling many biological and physiological processes associated with vegetation on the Earth's surface, such as photosynthesis, respiration, transpiration, carbon and nutrient cycle and rainfall interception. LAI can be measured indirectly by sunfleck ceptometers in an easy and non-destructive way but this practical methodology tends to underestimated when measured by these instruments. Trying to correct this underestimation, some previous studies heave proposed the multiplication of the observed LAI value by a constant correction factor. The assumption of this work is LAI obtained from the allometric equations are not so problematic and can be used as a reference LAI to develop a new methodology to correct the ceptometer one. This new methodology indicates that the bias (the difference between the ceptometer and the reference LAI) is estimated as a function of the basal area per unit ground area and that bias is summed to the measured value. This study has proved that while the measured Pinus LAI needs a correction, there is no need for that correction for the Eucalyptus LAI. However, even for this last specie the proposed methodology gives closer estimations to the real LAI values.<\/jats:p>","DOI":"10.1590\/0100-67622016000500008","type":"journal-article","created":{"date-parts":[[2016,12,7]],"date-time":"2016-12-07T22:03:40Z","timestamp":1481148220000},"page":"845-854","source":"Crossref","is-referenced-by-count":27,"title":["A PROPOSED METHODOLOGY FOR THE CORRECTION OF THE LEAF AREA INDEX MEASURED WITH A CEPTOMETER FOR PINUS AND EUCALYPTUS FORESTS"],"prefix":"10.1590","volume":"40","author":[{"given":"Domingos Mendes","family":"Lopes","sequence":"first","affiliation":[{"name":"Centre for the Research and Technology of Agro-Environmental and Biological Sciences,  Portugal"}]},{"given":"Nigel","family":"Walford","sequence":"additional","affiliation":[{"name":"Kingston University,  United Kingdom"}]},{"given":"Helder","family":"Viana","sequence":"additional","affiliation":[{"name":"Instituto Polit\u00e9cnico de Viseu,  Portugal"}]},{"given":"Carlos Roberto","family":"Sette Junior","sequence":"additional","affiliation":[{"name":"Universidade Federal de Goi\u00e1s,  Brazil"}]}],"member":"530","reference":[{"key":"ref1","doi-asserted-by":"crossref","first-page":"356","DOI":"10.1016\/j.ecolind.2015.05.038","article-title":"An indirect method of estimating leaf area index in a tropical deciduous forest of India","volume":"58","author":"BEHERAA S.K.","year":"2015","journal-title":"Ecological Indicators"},{"issue":"392","key":"ref2","doi-asserted-by":"crossref","first-page":"2403","DOI":"10.1093\/jxb\/erg263","article-title":"Ground based measurements of leaf area index: a review of methods, instruments and current controversies","volume":"54","author":"BR\u00c9DA N.J.J.","year":"2003","journal-title":"Journal of Experimental Botany"},{"key":"ref3","doi-asserted-by":"crossref","first-page":"421","DOI":"10.1111\/j.1365-3040.1992.tb00992.x","article-title":"Defining leaf area index of non-flat leaves","volume":"15","author":"CHEN J.M.","year":"1992","journal-title":"Plant, Cell and Environment"},{"issue":"27","key":"ref4","doi-asserted-by":"crossref","first-page":"6211","DOI":"10.1364\/AO.34.006211","article-title":"Plant canopy gap-size analysis theory for improving optical measurements of leaf-area index","volume":"34","author":"CHEN J.M.","year":"1995","journal-title":"Applied Optics"},{"issue":"5","key":"ref5","doi-asserted-by":"crossref","first-page":"1507","DOI":"10.2307\/1937474","article-title":"Measuring leaf area index with the Li-Cor LAAI-200 in pine stands","volume":"75","author":"DEBLONDE G.","year":"1994","journal-title":"Ecology"},{"key":"ref6","doi-asserted-by":"crossref","first-page":"644","DOI":"10.1016\/j.agrformet.2007.11.015","article-title":"Estimation of leaf area and clumping indexes of crops with hemispherical photographs","volume":"148","author":"DEMAREZ V.","year":"2008","journal-title":"Agricultural and Forest Meteorology"},{"key":"ref7","doi-asserted-by":"crossref","first-page":"156","DOI":"10.1007\/BF00328580","article-title":"Estimation of deciduous forest leaf area index using direct and indirect methods","volume":"104","author":"DUFR\u00caNE E.","year":"1995","journal-title":"Oecologia"},{"key":"ref8","doi-asserted-by":"crossref","first-page":"408","DOI":"10.1016\/j.rse.2006.04.005","article-title":"Impact of understory vegetation on forest canopy reflectance and remotely sensed LAI estimates","volume":"103","author":"ERIKSSON H.M.","year":"2006","journal-title":"Remote Sensing of Environment"},{"key":"ref9","doi-asserted-by":"crossref","first-page":"1553","DOI":"10.1016\/j.agrformet.2008.05.005","article-title":"Slope correction for LAI estimation from gap fraction measurements","volume":"148","author":"ESPA\u00d1A M.L.","year":"2008","journal-title":"Agricultural and Forest Meteorology"},{"key":"ref10","series-title":"Contribui\u00e7\u00e3o para o estudo da din\u00e2mica da biomassa e da produtividade prim\u00e1ria l\u00edquida em eucaliptais - regi\u00e3o litoral do centro de Portugal","author":"FABI\u00c3O A.M.","year":"1986"},{"issue":"5","key":"ref11","doi-asserted-by":"crossref","first-page":"1896","DOI":"10.2307\/1940988","article-title":"Rapid estimation of leaf area index in conifer and broad-leaf plantations","volume":"72","author":"GOWER S.T.","year":"1991","journal-title":"Ecology"},{"key":"ref12","series-title":"Variation in leaf morphology in response to light intensity - specific leaf area. 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