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Published online 1 November 1968
Published in Agron J 60:617-619 (1968)
© 1968 American Society of Agronomy
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Effects of Nitrogen and Potassium Fertilization, Irrigation, and Clipping Interval on Chemical Composition of Coastal Bermudagrass (Cynodon dactylon (L.) Pets.). I. Total Available Carbohydrates1

S. M. Hojjati, R. A. McCreery and W. E. Adams2

‘Coastal’ bermudagras(Cynodon dactylon (L.) Pers.) with and without supplemental irrigation on Cecil sandy loam fertilized with seven N:K treatments (224:224, 224:112; 224:37, 672:672, 672:336, 672:112, 1120:560 kg/ha per year) was clipped at 2-, 4-, and 6-week frequencies. Analyses of the forage for TAC (Total Available Carbohydrates) as measured by the soluble plus hydrolyzable (2% v/v H2SO4) carbohydrates, showed that irrigation and fertilization decreased the percentage TAC but increased the total TAC production per hectare due to higher yields. Extending the clipping interval increased both the percentage and yield per hectare of TAC.

Key Words: carbohydrates • forage irrigation • N-K ratios

1 Journal Series Paper no. 256, University of Georgia College of Agriculture Experiment Stations, College Station, Athens, in cooperation with Southern Piedmont Research Center, USDA, ARS, Watkinsville, Ga.

2 Former graduate assistant now with Soils Department, Pahlavi University, Shiraz, Iran; Assistant Professor, Department of Agronomy, University of Georgia, Athens, Ga. 30601; and Research Soil Scientist, USDA, Watkinsville, Ga. Paper based on part of a dissertation submitted by the senior author to the Graduate Faculty of the University of Georgia in partial fulfillment of requirements for the Ph.D. degree.

Received for publication March 18, 1968.




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Copyright © 1968 by the American Society of Agronomy.