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This article in AJ

  1. Vol. 70 No. 4, p. 613-618
     
    Received: Oct 7, 1977


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doi:10.2134/agronj1978.00021962007000040021x

Effects of Soil Water Stress on Growth and Nutrient Accumulation in Corn1

  1. V. Verasan and
  2. Ronald E. Phillips2

Abstract

Abstract

Soil water stress affects growth and accumulation of plant nutrient ions in corn (Zea mays L.); however, the functional relationship of these are not clearly understood. The objective of this study was to more clearly delineate the effect of soil water stress on growth and accumulation of nutrient ions in corn. Corn was grown in the greenhouse in 20-liter pots containing soil from the Ap horizon of Maury silt loam (Typic Paleudalfs) under two soil moisture treatments, stressed and non-stressed. The relationship soil water potential and cumulative evapotranspiration with nutrient accumulation and dry matter production were more significant than the relationship of soil water potential with dry matter production and nutrient accumulation. Since water stress affects turgidity, photosynthesis, respiration, cell enlargement, and other physiological processes of the plant, it was concluded that cumulative transpiration is a better integrator of the effects of these processes on plant growth than is soil water potential.

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