Oat growth under different nitrogen doses in eucalyptus alley cropping system in subtropical Brazil

Leonardo Deiss, Anibal de Moraes, Adelino Pelissari, Francisco Skora Neto, Vanderley Porfírio da Silva, Veruschka Rocha Medeiros Andreolla

Resumo


Plant growth analysis was performed to determine how oat (Avena sativa L. cv. IPR 126) cultivated for grain responds to the eucalyptus (Eucalyptus dunnii Maiden) alley cropping system (ACS) in subtropical Brazil. The hypothesis of this work was that oat growth response is not modified by nitrogen at distances relative to 4 year old eucalyptus tracks in the ACS. The objective of this study was to determine how the oat growth was influenced by nitrogen doses (12 and 80 kg N ha-1) at five equidistant positions between two adjacent eucalyptus double line tracks [20 m (4 m x 3 m)] in ACS and traditional no-till farming. The experiment was conducted in a split-block randomized block design with four replicates.  It was evaluated the oat relative growth rate, unit leaf rate, leaf weight fraction, panicle phytomass, panicle relative filling rate and grains-to-panicle ratio. Nitrogen doses altered the growth response differently in positions relative to the adjacent eucalyptus tracks; therefore, different nitrogen doses should be used in positions relative to the trees to improve oat growth in ACS in Subtropical Brazil.

Palavras-chave


Avena sativa; Eucalyptus dunnii; Agricultural integrated systems; Growth analysis; Agroforestry

Texto completo:

PDF

Referências


BROWNE, R. A.; WHITE, E. M.; BURKE, J. I. Responses of developmental yield formation processes in oats to variety, nitrogen, seed rate and plant growth regulator and their relationship to quality. Journal of Agricultural Science, v. 144, p. 533–545, 2006.

CAVIGLIONE, J. H. et al. Cartas climáticas do Paraná. Londrina: IAPAR, 2000. 1 CD-ROM. Available in:

ESPINDULA, M. C. et al. Nitrogen application methods and doses in the development and yield of wheat. Ciência e Agrotecnologia, v. 34, p. 1404-1411, 2010.

HUNT, R. et al. A Modern Tool for Classical Plant Growth Analysis. Annals of Botany, v. 90, p. 485-488, 2002.

HUNT, R. Plant growth analysis: individual plants. In: Thomas B., Murphy D. J.; Murray D. (eds.) Encyclopedia of Applied Plant Sciences. London: Academic Press. 2003. p. 579-588.

JENNINGS, V. M.; SHIBLES, R. M. Genotypic Differences in Photosynthetic Contributions of Plant Parts to Grain Yield in Oats. Crop Science, v. 8, p. 173-175, 1968.

JOSE, S.; GILLESPIE, A. R.; PALLARDY, S. G. Interspecific interactions in temperate agroforestry. Agroforestry Systems, v. 61, p. 237-255, 2004.

KOHLI, A.; SAINI, B. C. Microclimate modification and response of wheat planted under trees in a fan design in northern India. Agroforestry Systems, v. 58, p. 109-118, 2003.

LI, F. et al. Light distribution, photosynthetic rate and yield in a Paulownia-wheat intercropping system in China. Agroforestry Systems, v. 74, p. 163-172, 2008.

MAYDUP, M. L. et al. The contribution of ear photosynthesis to grain filling in bread wheat (Triticumaestivum L.). Field Crops Research, v. 119, p. 48-58, 2010.

PELTONEN-SAINIO, P. Contribution of enhanced growth rate and associated physiological changes to yield formation of oats. Field Crops Research, v. 33, p. 269-281, 1993.

QUINKENSTEIN, A. et al. Ecological benefits of the alley cropping agroforestry system in sensitive regions of Europe. Environmental Science & Policy, v. 12, p. 1112-1121, 2009.

SOIL SURVEY STAFF. Keys to Soil Taxonomy. 11. ed. Washington: USDA-Natural Resources Conservation Service, 2010. 346 p.

REICH, P. B. et al. Variation in growth rate and ecophysiology among 34 grassland and savanna species under contrasting N supply: a test of functional group differences. New Phytologist, v. 157, p. 617-631, 2003.

SALMAN, A. A.; BRINKMAN, M. A. Association of pre- and post-heading growth traits with grain-yield in oats. Field Crops Research, v.28, p.211-221, 1992.

SEMCHENKO, M.; ZOBEL, K. The effect of breeding on allometry and phenotypic plasticity in four varieties of oat (Avena sativa L.). Field Crops Research, v. 93, p. 151-168, 2005.

SIMS, L. et al. Nitrogen, phosphorus and light effects on growth and allocation of biomass and nutrients in wild rice. Oecologia, v. 170, p. 65-76, 2012.

STAMM, P.; KUMAR, P. P. The phytohormone signal network regulating elongation growth during shade avoidance. Journal of Experimental Botany, v. 61, p. 2889-2903, 2010.

TAIZ, L.; ZEIGER, E. Plant Physiology, 5th ed. Sinauer Associates, Sunderland, MA, 2010. 782 p.

USECHE, A.; SHIPLEY, B. Interspecific correlates of plasticity in relative growth rate following a decrease in nitrogen availability. Annals of Botany, v. 105, p. 333-339, 2010.




Revista Ciência Agronômica ISSN 1806-6690 (online) 0045-6888 (impresso), Site: www.ccarevista.ufc.br, e-mail: ccarev@ufc.br - Fone: (85) 3366.9702 - Expediente: 2ª a 6ª feira - de 7 às 17h.