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      Microclimate in coffee plantation grown under grevillea trees shading Translated title: Microclima de café arborizado com grevílea

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          Abstract

          Measurements of solar global radiation, wind speed, temperature and relative humidity of air were made in a coffee plantation (Coffea Arabica L. variety Icatu Vermelho- IAC 4045), grown under conditions of shading levels caused by grevillea trees (Grevillea robusta) in Mococa-SP region (21º 28' S, 47º 01' W, altitude 665m), between January and December 2005, aiming to show the effects of shading crop system on the microclimate. The results showed that there was a reduction of about 26% of solar global radiation in the shaded systems, with a monthly variation of 24-30%. It has been highlighted some differences in the transmittance of global radiation in the shaded coffee trees due to the spatial variation of grevillea canopy. There was a reduction of about 35% in the five days-averaged wind speed in the shaded system that also presented reduced maximum air temperature and a reduction in the vapor pressure deficit during day-light period, especially in the point sampled near to the grevillea trees.

          Translated abstract

          Medições de radiação solar global, velocidade do vento, temperatura e umidade relativa do ar, foram realizadas em um cafezal (Coffea arabica L.) cv. Icatu Vermelho IAC 4045, cultivado a pleno sol e arborizado com grevílea (Grevillea robusta), no município de Mococa - SP (21º 28' S, 47º 01' W, altitude 665 m) entre janeiro e dezembro de 2005, com o objetivo de apresentar os efeitos do cultivo arborizado no microclima. Os resultados obtidos mostraram que houve atenuação média dos valores de radiação solar global, em cultivo de café arborizado, em 26%, com variação mensal de 24 a 30%. Pela descontinuidade da cobertura das árvores de grevílea, foi verificada diferença de transmissão da radiação solar em diferentes pontos do sistema arborizado. Foi verificada ainda redução média de 35% nas médias quinquidiais da velocidade do vento no cultivo arborizado em relação ao cultivo a pleno sol. O cultivo arborizado promoveu redução na temperatura máxima do ar e no déficit de saturação de vapor no período diurno, sendo essas reduções mais evidentes no ponto amostral próximo à árvore de grevílea.

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          Most cited references15

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          Microclimatic interactions in agroforestry systems

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            Tree-crop Interactions : A Physiological Approach

            A framework for quantifying the various effects of tree-crop interactions. Mexed cropping of annuals and woody perennials: an analytical approach to productivity and management. Mulch and shade model for optimum alley-cropping design depending on soil fertility. Principles of resource capture and utilization of light and water. Microclimatic modifications in agroforestry. The water balance of mixed tree-cropi systems. Biological factors affecting form and function in woody-non-woody plant mixtures. Tree-soil-crop interactions on slopes. Root distribution of tress and cropos: competition and/or complementarity. Woody-non-woody plant mixtures: some afterhoughts.
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              Efeitos do vento sobre mudas de cafeeiro mundo novo e catuaí vermelho

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                asagr
                Acta Scientiarum. Agronomy
                Acta Sci., Agron.
                Editora da Universidade Estadual de Maringá - EDUEM (Maringá )
                1807-8621
                June 2011
                : 33
                : 2
                : 201-206
                Affiliations
                [1 ] Embrapa Brazil
                [2 ] Instituto Federal do Sul de Minas Gerais Brazil
                [3 ] Instituto Agronômico Brazil
                [4 ] Agência Paulista de Tecnologia dos Agronegócios Brazil
                Article
                S1807-86212011000200002
                10.4025/actasciagron.v33i2.7065
                a25e57d0-773b-49be-8e2d-befa37cb5624

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=1807-8621&lng=en
                Categories
                AGRONOMY

                Horticulture
                Coffea arabica,shading system,solar radiation,microclimate,arborização,radiação solar,microclima

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