02486naa a2200469 a 450000100080000000500110000800800410001902200250006002400420008510000170012724501730014426000090031752010890032665000170141565000230143265000190145565000200147465000220149465000100151665000110152665000300153765000250156765000210159265000160161365300200162965300290164965300110167865300180168965300310170765300140173865300200175265300210177265300160179365300150180965300320182470000210185670000190187770000190189670000210191570000190193677300610195515072152021-07-28       2007    bl uuuu     u00u1 u    #d  a0100-6762 (impresso)7 a10.1590/S0100-67622007000200002.2DOI1 aRIGHI, C. A.  aMeasurement and simulation of solar radiation availability in relation to the growth of coffe plants in an agroforestry system with rubber trees.h[electronic resource]  c2007  aSolar 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.  aAgroforestry  aGrowth performance  aMixed cropping  aSolar radiation  aAgrossilvicultura  aCafé  aCaucho  aConsorciação de cultura  aFator de crescimento  aRadiação solar  aSeringueira  aAgroforestería  aCoffea arabica cv Obatã  aCoffee  aCultivo mixto  aDesempeño del crecimiento  aHevea spp  aPiracicaba (SP)  aRadiación solar  aRubber tree  aSão Paulo  aSistema Agroflorestal (SAF)1 aBERNARDES, M. S.1 aLUNZ, A. M. P.1 aPEREIRA, C. R.1 aDOURADO NETO, D.1 aFAVARIN, J. L.  tRevista Árvore, Viçosagv. 31, n. 2, p. 195-207, 2007.