Título:	Measurement and simulation of solar radiation availability in relation to the growth of coffe plants in an agroforestry system with rubber trees.
Autoria:	RIGHI, C. A. BERNARDES, M. S. LUNZ, A. M. P. PEREIRA, C. R. DOURADO NETO, D. FAVARIN, J. L.
Afiliação:	Ciro Abbud Righi, USP-CENA; Marcos Silveira Bernardes, USP-ESALQ; AURENY MARIA PEREIRA LUNZ, CPAF-AC; Carlos Rodrigues Pereira, UFRRJ; Durval Dourado Neto, USP-ESALQ; José Laercio Favarin, USP- ESALQ.
Ano de publicação:	2007
Referência:	Revista Árvore, Viçosa, v. 31, n. 2, p. 195-207, 2007.
Conteúdo:	Solar radiation is an important factor for plant growth, being its availability to understory crops strongly modified by trees in an Agroforestry System (AFS). Coffee trees (Coffea arabica cv. Obatã IAC 1669- 20) were planted at a 3.4 x 0.9 m spacing inside and aside rows of monocrops of 12 year-old rubber trees (Hevea spp.), in Piracicaba-SP, Brazil (22°42'30"S, 47°38'00"W - altitude: 546m). One-year-old coffee plants exposed to 25; 30; 35; 40; 45; 80; 90; 95 and 100% of the total solar radiation were evaluated according to its biophysical parameters of solar radiation interception and capture. The Goudriaan (1977) adapted by Bernardes et al. (1998) model for radiation attenuation fit well to the measured data. Coffee plants tolerate a decrease in solar radiation availability to 50% without undergoing a reduction on growth and LAI, which was approximately 2m2.m-2 under this condition. Further reductions on the availability of solar radiation caused a reduction in LAI (1.5m2.m-2), thus poor land cover and solar radiation interception, resulting in growth reduction.
Thesagro:	Agrossilvicultura Consorciação de cultura Fator de crescimento Radiação solar Seringueira Café Caucho
NAL Thesaurus:	Agroforestry Mixed cropping Growth performance Solar radiation
Palavras-chave:	Sistema Agroflorestal (SAF) Coffea arabica cv Obatã Piracicaba (SP) São Paulo Coffee Hevea spp Agroforestería Cultivo mixto Desempeño del crecimiento Radiación solar Rubber tree
ISSN:	0100-6762 (impresso)
Digital Object Identifier:	10.1590/S0100-67622007000200002.
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPAF-AC)