MAIZE STALK SUSTAINABILITY IN MAIZE HYBRIDS FROM DIFFERENT ERAS AS AFFECTED BY PLANT DENSITY
DOI:
https://doi.org/10.5965/223811710122002063Keywords:
Zea mays, lodging, breakage, grain yieldAbstract
The increment in plant density enhances the radiation interception period by maize. Nonetheless, it also stimulates etiolation, favoring root and stem lodging. This experiment was conducted aiming to evaluate the effects of population density on plant architecture, stalk sustainability and grain yield of maize hybrids from different eras. The experiment was installed in Lages, SC, on 10/20/2000. A split plot design was used. Hybrids Agroceres 12 (Ag 12), Agroceres 303 (Ag 303) and Dekalb 929 (DKB 929), commercially released in the 70’s, 80’s and 90’s, respectively, were tested in the main plots. Plant populations equivalent to 25,000, 50,000, 75,000 and 100,000 pl ha-1 were assessed in the split plots. Morphological and allometric traits, root and stem lodging, grain production of erect and prostrated plants were determined. Plant population density did not affect root lodging. The increase in plant number per hectare from 25,000 to 100,000 stimulated greater stalk lodging for hybrids Ag 12 and Ag 303, but did not interfere with DKB 929 stem sustainability. Traits such as low ear-to-plant height ratio and high stem diameter homogeneity were instrumental to mitigate DKB 929’s stalk lodging before harvesting. Maize stem sustainability is fundamental to properly explore commercial hybrids yield potential through the use of high plant populations.
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ALMEIDA, M.L., SANGOI, L., ENDER, M. Incremento na densidade de plantas: uma alternativa para aumentar o rendimento de grãos de milho em regiões de curta estação estival de crescimento. Ciência Rural, Santa Maria, v. 30, n. 1, p. 23-29, 2000.
ARGENTA, G., SILVA, P.R.F., SANGOI, L. Arranjo de plantas em milho: análise do estado da arte. Ciência Rural, Santa Maria, v. 31, n. 5, p. 1075-1084, 2001.
BALLARÉ, C.L., CASAL, J.J. Light signals perceived by crop and weed plants. Field Crops Research, Amsterdan, v. 67, n.1, p. 149-160, 2000.
COMISSÃO DE FERTILIDADE DO SOLO-RS/SC. Recomendações de adubação e calagem para os estados do Rio Grande do Sul e Santa Catarina. Passo Fundo: SBCS-Núcleo Regional Sul, 1995, 146p.
DUVICK, D.N., CASSMAN, K.G. Post-green revolution trends in yield potential of temperate maize in the North- Central United States. Crop Science, Madison, v. 39, p. 1622-1630, 1999.
EMBRAPA. Centro Nacional de Pesquisa de Solos. Sistema brasileiro de classificação de solos. Brasília: EMBRAPA, 1999. 412 p.
HONDROYIANNI, E., PAPAKOSTA, D.K., GAGIANAS, A. A., TSATSARELIS, K.A. Corn stalk
traits related to lodging resistance in two soils of differing salinity. Maydica, Bergamo, v. 45, p. 125-133, 2000.
MADDONNI, G.A., OTEGUI, M.E. Leaf area, light interception, and crop development in maize. Field Crops Research, Amsterdan, v. 48, p. 81-87, 1996.
RAJCAN, I., SWANTON, C.J. Understanding maize-weed competition: resource competition, light quality and the whole plant. Field Crops Research, Amsterdan, v.71, n. 1, p. 139-150, 2001.
RITCHIE, S.W.; HANWAY, J.J. How a corn plant develops. Ames: Iowa State University of Science and Technology, 1993. 26p. (Special Report, 48).
SANGOI, L. Understanding plant density effects on maize growth and development: an important issue to maximize grain yield. Ciência Rural, v. 31, n.1, p. 159-168, 2001.
SANGOI, L., ENDER, M., GUIDOLIN, A.F., BOGO, A.; KOTHE, D. M. Evolução da tolerância a doenças de híbridos de milho de diferentes épocas em três populaçõesde planta Ciência Rural, Santa Maria, v. 30, n. 1, p. 17- 21, 2000.
SANGOI, L., ALMEIDA, M. L., SILVA, P. R. F.; ARGENTA, G. Bases morfo-fisiológicas para a maior tolerância dos híbridos modernos de milho a altas densidades de plantas. Bragantia, 2002b, prelo.
SANGOI, L., GRACIETTI, M.A., RAMPAZZO, C., BIANCHET, P. Response of Brazilian maize hybrids from different eras to changes in plant density. Field Crops Research, Amsterdan, prelo, 2002c
SANGOI, L.; LECH, V. A.; RAMPAZZO, C.; GRACIETTI, L. C. Acúmulo de matéria seca em híbridos de milho sob diferentes relações entre fonte e dreno. Pesquisa Agropecuária Brasileira, Brasília, v. 37, n. 3, p. 259-267, 2002a.
STEWART, D.W., DWYER, L.M. Mathematical characterization of leaf shape and area of maize hybrids. Crop Science, Madison, v. 39, n. 2, p. 422-427, 1997.
SLAFFER, G.A.; OTEGUI, M. Is there a niche for physiology in future genetic improvement of maize yields? In: SLAFFER, G.A.; OTEGUI (Ed.). Physiological bases for maize improvement. New York: Haworth Press, 2000. cap.1, p.1-14.
TOLLENAAR, M. Is low plant density a stress in maize? Maydica, Bergamo, v.37, p. 305-311, 1992.
TOLLENAAR, M., LEE, E.Yield potential, yield stability and stress tolerance in maize. Field Crops Research, Amsterdan, v. 75, p. 161-169. 2002.
TOLLENAAR, M., MCCULLOUGH, D.E., DWYER, L.M. Physiological basis of the genetic improvement of corn. In: SLAFER, G.A. Genetic improvement of field crops. New York: Marcel Dekker, 1994. Cap.4, p.183- 236.
TOLLENAAR, M., WU, J. Yield improvement in temperate maize is attributable to greater stress tolerance. Crop Science, Madison, v. 39, p. 1597-1604, 1999.
WESTGATE, M.E., FORCELLA, F., REICOSKY, D.D., SOMSEN, J. Rapid canopy closure for maize production in the northern US corn belt: Radiation-use efficiency and grain yield. Field Crops Research, Amsterdan, v.49, n.2,
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