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Shade and sapling size influence restoration of Araucaria angustifolia

Journal of Forestry Research 2021年第5期32卷 1833-1841页

作者： simone aparecida zolet sasso JoséAbramo Marchese Amanda Pacheco Cardoso Moura Bruna Valéria Gil Anelise Tessari Perboni Joel Donazzolo Fabrícia Lorrane Rodrigues Oliveira Bruno Francisco Sant’Anna-Santos Angela Rohr Moeses Andrigo Danner Agronomy Department Universidade Tecnológica Federal do Paraná(UTFPR)Campus Pato BrancoVia do Conhecimentokm 01Pato BrancoParaná85503-390Brazil UTFPR Campus Dois VizinhosEstrada para Boa Esperançakm 04Dois VizinhosParaná85660-000Brazil Biological Sciences Department Universidade Federal do Paraná(UFPR)Avenida Coronel Francisco H.dos Santos100CuritibaParaná81531-980Brazil

Toward improving reforestation of Brazilian pine(Araucaria angustifolia),two contrasting sapling sizes in either full sun or in the shade of a mixed plantation and the effect of opening the canopy were evaluated for survival,growth,gas exchange,photosynthetic pigments,and leaf anatomy 18 months after being *** 23 months after planting,a partial opening was made in the canopy in the mixed plantation,then the saplings were evaluated again after 2 months for the same morphophysiological *** 18 months,saplings planted in the full sun had higher survival,growth,pigments,and photosynthesis compared to the shaded *** saplings had higher survival and growth compared to the small *** leaves were thinner and little differentiation of palisade parenchyma and *** opening of the canopy,photo synthetically active radiation was 10 times higher,and the saplings quickly grew in height due to increased ***,although the species can tolerate shade,growth in the shade is *** recommend that for reforestation purposes of Brazilian pine,large saplings should be selected and planted in the open for better development.

关键词： Brazilian pine Luminosity Gas exchanges Photosynthetic pigments Leaf anatomy

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