Microclimatic characterization and productivity of coffee plants grown under shade of pigeon pea in Southern Brazil

Pesquisa Agropecuária Brasileira

Heverly Morais²  Paulo Henrique Caramori²  Ana Maria De Arruda Ribeiro¹  José Carlos Gomes²  Mirian Sei Koguishi² 

[1] ,Instituto Agronômico do ParanáLondrina PR ,Brazil

关键词: Coffea arabica;    Cajanus cajan;    frost protection;    photosynthetically active radiation;    coffee production;    shade;    Coffea arabica;    Cajanus cajan;    proteção contra geada;    photosynthetically active radiation;    produção de cafeeiros;    sombreamento;   

DOI  :  10.1590/S0100-204X2006000500007

来源: SciELO

【 摘 要 】

Recent studies on coffee (Coffea arabica L.) cultivation in agroforestry systems in Southern Brazil have shown the potential of partial shading to improve management of this crop. The objective of this work was to evaluate microclimatic conditions and their effects on coffee production of plants shaded with pigeon pea (Cajanus cajan) in comparison to unshaded ones, from May 2001 to August 2002 in Londrina, State of Paraná, Brazil. The appraised microclimatic characteristics were: global radiation, photosynthetic and radiation balance; air, leaf and soil temperatures; and soil humidity. Shading caused significant reduction in incident global solar radiation, photosynthetically active radiation and net radiation, and attenuated maximum leaf, air and soil temperatures, during the day. Shade also reduced the rate of cooling of night air and leaf temperatures, especially during nights with radiative frost. Soil moisture at 0-10 cm depth was higher under shade. The shaded coffee plants produced larger cherries due to slower maturation, resulting in larger bean size. Nevertheless, plants under shade emitted less plagiotropic branches, with smaller number of nodes per branch, and fewer nodes with fruits, resulting in a large reduction in coffee production. These results show the need to find an optimal tree density and management that do not compromise coffee production and protect against extreme temperatures.

【 授权许可】

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