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This article in AJ

  1. Vol. 62 No. 5, p. 567-571
     
    Received: Nov 14, 1969
    Published: Sept, 1970


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doi:10.2134/agronj1970.00021962006200050004x

Effect of Soil Temperature on Rate of Barley Development and Nutrition1

  1. J. F. Power,
  2. D. L. Grunes,
  3. G. A. Reichman and
  4. W. O. Willis2

Abstract

Abstract

Results from this experiment indicate that for barley plants harvested at equal stages of morphological development, low soil temperatures per se are not deterimental to growth. Barley was grown to maturity in agrowth room at soil temperatures of 9, 15.5, and 22C with either 9 or 44 ppm fertilizer phosphorus. At a given stage of plant development, dry matter production and N and P uptake were usually lowest at a soil temperature of 22C. Dry weights, grain yields, and nutrient uptake at 9C usually equalled or exceeded those at 15.5C — the soil temperature considered optimum for barely production. At 9C growth was very slow until the barley developed to the 4-leaf stage, but thereafter approximated the growth rate at higher soil temperatures. Nutrient uptake and water use data suggest that the slow initial growth rate at 9C may be due to restricted nutrient translocation from roots to tops, rather than to reduced rate of uptake of water or nutrients. Soil temperatures affected both the growth rate and water use rate, resulting in only a small effect of soil temperature on total water used to reach a given growth stage.

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