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| Formato: | Artículo científico |
| Lenguaje: | pt |
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Universidade Federal de Viçosa
2007
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| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=48831202 |
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- Measurement and simulation of solar radiation availability in relation to the growth of coffee plants in an agroforestry system with rubber trees Aureny Maria Pereira Lunz Ciro Abbud Righi Marcos Silveira Bernardes Carlos Rodrigues Pereira Durval Dourado José Laercio Favarin Agrociencias coffee attenuation Solar radiation rubber tree and model Solar radiation is an important factor for plant growth, being its availability to understory cropsstrongly 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 (Heveaspp.), in Piracicaba-SP, Brazil (22°4230 S, 47°3800 W altitude: 546m). One-year-old coffee plants exposedto 25; 30; 35; 40; 45; 80; 90; 95 and 100% of the total solar radiation were evaluated according to its biophysicalparameters 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 radiationavailability to 50% without undergoing a reduction on growth and LAI, which was approximately 2m2.m-2 underthis 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. 2007 artículo científico 0100-6762 https://www.redalyc.org/articulo.oa?id=48831202 pt http://www.redalyc.org/revista.oa?id=488 Revista Árvore application/pdf Universidade Federal de Viçosa Revista Árvore (Brasil) Num.2 Vol.31