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Book: Proceedings of the Second International Turfgrass Research Conference
Published by: American Society of Agronomy, Crop Science Society of America

 

This chapter in PROCEEDINGS OF THE SECOND INTERNATIONAL TURFGRASS RESEARCH CONFERENCE

  1.  p. 196-208
     
    Proceedings of the Second International Turfgrass Research Conference

    Eliot C. Roberts (ed.)

    ISBN: 978-0-89118-573-4

     
    Published: 1974


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doi:10.2135/1974.proc2ndintlturfgrass.c26

Influence of N and K nutrition on net photosynthesis, dark respiration, and carbohydrates in centipedegrass1

  1. R. H. Walker and
  2. C. Y. Ward

Abstract

A series of experiments was conducted to determine the influence of N and K fertilization on the rate of net photosynthesis, dark respiration, and nonstructural carbohydrate accumulation in centipedegrass (Eremochloa ophiuroides (Munro) Hack.). The response of centipedegrass to varying ratios of N to K fertilization was related to its ability to withstand low winter temperatures.

Centipedegrass under greenhouse and field conditions was fertilized with 0.98, 1.96, and 2.94 kg of N; and 0.82, 1.63, and 2.45 kg of K/100 m2. Phosphorus was constant at 0:22 kg/100 m2 for all treatments.

Net photosynthesis and dark respiration increased as N fertilization was increased. Conversely, increasing K fertilization generally decreased these parameters.

Starch accumulation in the stolons was enhanced by increased K fertilization, usually at the expense of a lower concentration of simple sugars. Additional index words: Carbon dioxide, Infrared, Light.

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Copyright © 1974. Copyright 1974 by the American Society of Agronomy, Inc. and the Crop Science Society of America, Inc., 5585 Guilford Rd., Madison, WI 53711 USA

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