Full TGIF Record # 3951
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1080/01904168209362945#.UnqmN23OR8E
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Author(s):Hannaway, David B.; Bush, Lowell P.; Leggett, J. Everett
Author Affiliation:Department of Agronomy, Kentucky University, Lexington, Kentucky
Title:Mineral composition of Kenhy tall fescue as affected by nutrient solution concentrations of Mg and K
Source:Journal of Plant Nutrition. Vol. 5, No. 3, 1982, p. 137-151.
# of Pages:15
Related Web URL:http://www.tandfonline.com/doi/abs/10.1080/01904168209362945#.UnfT4hDOR8E
    Last checked: 11/04/2013
    Notes: Guide page with abstract
Keywords:TIC Keywords: Festuca arundinacea; Magnesium; Potassium; Nutrition
Abstract/Contents:"Four greenhouse sand culture experiments were conducted with Kenhy tall fescue, a Lolium multiflorum X Festuca arundinacea hybrid derivative. These experiments were conducted to characterize mg accumulation and the chemical composition of Kenhy under various combinations of Mg, K, and N solution concentrations. Of primary interest was the shape and magnitude of response of tissue Mg concentration to solution K levels and potential for Mg accumulation that exists in Kenhy under low solution K levels. Analyses were made for Mg, K, Ca, Na, N, and nitrate. Increased Kg concentrations were observed with increased solution Mg. Increased solution K was in all cases associated with lower concentrations of Mg. Under conditions of low solution K (0.125 mM) and adequate Mg (0.25 mM), Mg accumulation exceeded 1.0%. Increased solution N was associated with decreased Mg concentrations. Both the linear and quadratic components of Mg solution concentration contributed significantly to increased tissue Mg. Hawever, the linear component of K solution concentration was sufficient to account for decreased tissue Mg. The reduction of tissue Mg to solution K was greater at higher concentrations of K. Potassium accumulation significantly increased with increased solution K. Increased solution Mg was associated with lower tissue K in which the greatest reduction in K accumulation occurred with the first Mg addition. Calcium accumulation decreased with increased solution K. Higher solution Mg was associated with lower tissue Ca levels while higher levels of N were associated with increased tissue Ca. Sodium accumulation was significantly reduced by increased K concentrations but neither Mg nor N was effective in consistently altering tissue Na concentrations. From these experiments it is evident that Kenhy tall fescue has the absorptive capability for high levels of Mg under conditions of low levels of solution K. However, even small increments of solution K were shown to be capable of substantially reducing the Mg content, Thus, the selection of forage grasses for Mg absorptive capability must be conducted under conditions of high solution K, if large improvements on present forage materials are to be obtained. In addition, the inverse relationship between Mg and K present in Kenhy seedlings confirms the need to consider K fertilization recommendations in attempting to increase forage Mg durirg the grass tetany period."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hannaway, D. B., L. P. Bush, and J. E. Leggett. 1982. Mineral composition of Kenhy tall fescue as affected by nutrient solution concentrations of Mg and K. J. Plant Nutr. 5(3):p. 137-151.
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DOI: 10.1080/01904168209362945
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MSU catalog number: QK 867 .J67
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