Influence of N and K nutrition on net photosynthesis, dark respiration, and carbohydrates in centipedegrass1
- R. H. Walker and
- C. Y. Ward
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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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