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Revista Brasileira de Ciência do Solo

On-line version ISSN 1806-9657

Rev. Bras. Ciênc. Solo vol.23 no.1 Viçosa Jan./Mar. 1999

http://dx.doi.org/10.1590/S0100-06831999000100004 

SEÇÃO I - FÍSICA DO SOLO

 

Crescimento de plantas de milho submetidas a déficit hídrico em solos de diferentes texturas

 

Water deficit effects on maize grown in soils with different textures

 

 

R. CarlessoI; R. F. SantosII

IEngenheiro-Agrônomo, Professor Titular do Departamento de Engenharia Rural, Centro de Ciências Rurais, Universidade Federal de Santa Maria (UFSM). CEP 97119-900 Santa Maria (RS). Bolsista do CNPq
IIEngenheiro-Agrônomo, aluno do curso de Pós-Graduação em Engenharia Agrícola, UFSM

 

 


RESUMO

O objetivo deste experimento foi quantificar variações no dossel vegetativo de plantas de milho submetidas a dois manejos da água de irrigação em solos de três texturas (argila pesada, franco-argilo-siltosa e franco-arenosa). O experimento foi instalado em área do Departamento de Engenharia Rural, da Universidade Federal de Santa Maria, no ano agrícola 1995/1996. Utilizou-se um conjunto de 12 lisímetros de drenagem com dimensões de 156 cm de comprimento, 100 cm de largura e 80 cm de profundidade, protegidos das precipitações por meio de uma cobertura móvel. Os tratamentos consistiram de dois níveis de manejos da água no solo (irrigado e déficit hídrico terminal) e três texturas de solos. Os resultados demonstraram que a redução no índice de área foliar das plantas de milho submetidas a déficit hídrico foi maior em solos de textura argila pesada e franco-argilo-siltosa do que no solo de textura franco-arenosa. A altura das plantas de milho diminuiu quando a fração de água disponível às plantas foi inferior a 0,57, 0,74 e 0,52, para os solos de textura argila pesada, franco-argilo-siltosa e franco-arenosa, respectivamente.

Termos de indexação: dossel vegetativo, textura do solo, área foliar.


SUMMARY

The objective of this experiment was to quantify variations in maize canopy of plants submitted to two water managements (irrigated and terminal soil water deficit) in clayey, loamy and sandy soils. The experiment was conducted at the experimental area of the Rural Engineering Department of the Federal University of Santa Maria during the 1995/1996 growing season. A set of 12 drainage lysimeters was used. These were 156 cm long, 100 cm wide and 80 cm deep and were placed under a shelter to avoid rainfall. The treatments consisted of two soil water managements (irrigated and terminal soil water deficit applied during vegetative growth) of three soils with the distinct textures. A completely randomized statistical design with two replications was used. Results indicated that reduction in leaf area index of maize plants grown under soil water deficit was greater in clayey and loamy soils than in sandy soil. Plant height was reduced when the fraction of water available to the plant was lower than 0.57, 0.74 and 0.52 for clayey, loamy and sandy soils, respectively.

Index terms: plant canopy, soil texture, plant leaf area.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

LITERATURA CITADA

CARLESSO, R. Absorção de água pelas plantas: água disponível versus extraível e a produtividade das culturas. Ci. Rural, 25:183-188, 1995.         [ Links ]

CARLESSO, R. Influence of soil water deficits on maize growth and leaf area adjustments. East Lansing, Michigan State University, 1993. 275p. (Tese de Doutorado)        [ Links ]

GERIK, T.J.; FAVER, K.L. & THAXTON, P.M. Late season water stress in cotton: I. Plant growth, water uses, and yield. Crop Sci., 36:914-921, 1996.         [ Links ]

GRANT, R.F.; JACKSON, B.S.; KINIRY, J.R. & ARKIN, G.F. Water deficit timing effects on yield components in maize. Agron. J., 81:61-65, 1989.         [ Links ]

HENSON, I.E.; JENSEN, C.R. & TURNER, N.C. Leaf gas exchange and water relations of lupins and wheat. I. Shoot responses to soil water deficits. Aust. J. Plant Physiol., 16:401-413, 1989.         [ Links ]

KLUBERTANZ, T.H.; PEDIGO, L.P. & CARLSON, R.E. Soybean physiology, regrowth, and senescence in response to defoliation. Agron. J., 88:577-582, 1996.         [ Links ]

LECOEUR, J. & SINCLAIR, R.T. Field pea transpiration and leaf growth in response to soil water deficits. Crop Sci., 36:331-335, 1996.         [ Links ]

LUDLOW, M.M. & MUCHOW, R.C. A critical evaluation of traits for improving crop yields in water-limited environments. Adv. Agron., 43:107-153, 1990.         [ Links ]

McCREE, K.J. & FERNÁNDEZ, C.J. Simulation model for studyng physiological water stress responses of whole plants. Crop Sci., 29:353-360, 1989.         [ Links ]

MEYER, W.S. & GREEN, G.C. Water use by wheat and plant indicator of available soil water. Agron. J., 72:253-257, 1980.         [ Links ]

NeSMITH, D.S. & RITCHIE, J.T. Short- and long-term responses of corn to a pre-anthesis soil water deficit. Agron. J., 84:107-113, 1992.         [ Links ]

PÁEZ, A.; GONZÁLES, M.E. & YRAUSQUÍN, O.X. Water stress and clipping management effects on guineagrass: I. Growth and biomass allocation. Agron. J., 87:698-706, 1995.         [ Links ]

PEITER, X.M. Comportamento do Sorgo Granífero (Sorghum bicolor Moench.) quando submetido a diferentes níveis de irrigação. Santa Maria, Universidade Federal de Santa Maria, 1994. 77p. (Tese de Mestrado)        [ Links ]

RITCHIE, J.T.; BURNETT, E. & HENDERSON, R.C. Dryland evaporative flux in a subhumid climate. 3. Soil water influences. Agron. J., 64:168-173, 1972.         [ Links ]

ROSENTHAL, W.D.; ARKIN, G.F. & SHOUSE, P.L. Water deficit effects on transpiration and leaf growth. Agron. J., 79:1019-1026, 1987.         [ Links ]

SMITH, J.R. & NELSON, R.L. Relationship between seed filling period and yield among soybean breeding lines. Crop Sci., 26:469-472, 1986.         [ Links ]

TAIZ, L. & ZEIGER, S. Plant physiology. Redwood City. The Benjamim Cummings Publishing Company, 1991. p.690.         [ Links ]

WOLFE, D.W.; HENDERSON, D.W.; HSIAO, T.C. & ALVINO, A. Interactive water and nitrogen effects on senescence of maize. II. Photosysnthetic decline and longevity of individual leaves. Agron. J., 80:865-870, 1988.         [ Links ]

 

 

Recebido para publicação em setembro de 1997
Aprovado em setembro de 1998

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