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This article in AJ

  1. Vol. 69 No. 4, p. 723-724
     
    Received: Sept 30, 1976


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doi:10.2134/agronj1977.00021962006900040048x

Effect of Root Temperatures on Growth and Cation Composition of Festuca arundinaceae Schreb.1

  1. J. E. Leggett,
  2. D. B. Egli and
  3. L. Bush2

Abstract

Abstract

The accumulation of cations by many cool season forages has been shown to be influenced by both air and soil temperature. This investigation investigated the influence of root temperature on the cation composition of a tall fescue (Festuca arundinaceae Schreb.) derived from an annual ryegrass (Lolium multiflorum L.) × tall fescue hybrid. Plants were collected from field-grown, spaced plants, transplanted to a greenhouse hydroponics system, and grown on a modified Hoagland's nutrient solution. The temperature of the roots on some of the plants was maintained at approximately 12 C by cooling the nutrient solution reservoir, while roots on the control plants were maintained at the ambient temperature (approximately 25 C). Cooling the roots reduced the weekly accumulation of dry matter of the tops by nearly 50% but had no effect on the concentration of K, Ca, and Mg in the tissue or on the ratio of K/(Ca + Mg).

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