Full TGIF Record # 65523
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Publication Type:
Author(s):Goatley, M.; Farley, D.
Author Affiliation:Goatley: Assistant Professor of Agronomy; Farley: Graduate Student, Mississippi State University
Title:Late-season fertilization of Tifgreen bermudagrass with various level of N and K₂O
Meeting Info.:July 16, 1991
Source:Mississippi State Turfgrass Field Day. 1991, p. 14-16.
# of Pages:3
Publishing Information:[Mississippi State: Mississippi State University]
Keywords:TIC Keywords: Cynodon; Nitrogen; Potash; Cold resistance; Color evaluation; Visual evaluation
Abstract/Contents:Nitrogen (ammonium nitrate) levels of 0, 1, or 2 lbs./1000 ft2 and potash (K)2O, muriate of potash) levels of 0, 1, or 2 lbs./1000 ft2 were applied to Tifgreen bermudagrass plots on 12 Oct. 1990. Plot color evaluations were made through mid November. Evaluations of % green turf ground cover were made beginning in March and continuing through May, 1991. Plugs were taken from the treated plots in December of 1989 and 1990 and again in March 1990 and 1991. The ground tissue was then subjected to an acid extraction to determine TNC levels. There was no significant interaction between N and K2O treatments for any variable measured. Potash treatment generally provided no visual color or quality changes in the Tifgreen appearance. The only significant response was a slightly better color rating in April for the 1lb. K2O/1000 ft2 treatment. The nitrogen treatment produced very pronounced differences in plot color and percent ground cover the following fall and spring (Tables 1 and 2). There was little or no difference in % ground cover ratings between the two N levels (Table 3). Both N -treated plots had larger ground cover ratings through May 1, with the only significant difference between N levels occurring on that date. No significant differences in TNC were observed for K2O treatment in either year's measurements. However there were differences and definite trends in the N treated plots. For December 1989 rhizome sampling, the control plot had significantly greater TNC levels than did the 2 lb N treatment. In both years, 2 of the proposed benefits of late-season N fertilization have been realized: a) sustained color late in the growing season and b) improved spring green-up. To this point, no decrease in winter hardiness ahs been evidenced for any treatment. Preliminary laboratory testing measuring winter hardiness of bermudagrass rhizomes indicates no significant decline in winter hardiness for 1 or 2 lbs N/1000 ft2 treatment and does indicate slightly better winter hardiness for the 1 and 2 lbs K2O/1000 ft2 treatments as compared to the control.
See Also:Other items relating to: AUTUMN
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Goatley, M., and D. Farley. 1991. Late-season fertilization of Tifgreen bermudagrass with various level of N and K₂O. Miss. State Turfgrass Field Day. p. 14-16.
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