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| Web URL(s): | https://www.crops.org/publications/cs/pdfs/39/1/CS0390010209
Last checked: 08/05/2010
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| Publication Type:
| Refereed |
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| Author(s): | Ebdon, J. S.;
Petrovic, A. M.;
White, R. A. |
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| Title: | Interaction of nitrogen, phosphorous, and potassium on evapotranspiration rate and growth of Kentucky Bluegrass |
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| Source: | Crop Science. Vol. 39, No. 1, January/February 1999, p. 209-218. |
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| Publishing Information: | Madison, WI: Crop Science Society of America |
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| # of Pages: | 10 |
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| Keywords: | TIC Keywords: Nitrogen; Phosphorus; Potassium; Evapotranspiration rate; Poa pratensis; Clipping weight; Fertilization rates; Fertilizer combinations; Interactions
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| Abstract/Contents: | "Research is limited concerning the interactive effects of nitrogen, phosphorous, and potassium on turfgrass evapotranspiration (ET) rate. Previous research has emphasized the influence of N on growth and ET. In this study, a central composite experimental design was used to investigate the interactive effects of N, P, and K on Kentucky bluegrass (Poa pratensis L. 'Magestic') water use and growth under field conditions. Five treatment levels for each nutrient were used; N treatment levels ranged from 49 to 588 kg ha ⁻¹ yr ⁻¹, P from 0 to 86 kg ha ⁻¹ yr ⁻¹, and K from 0 to 348 kg ha ⁻¹ yr ⁻¹. Clipping yield and ET (measured in 25-cm diam. bucket-type lysimeters) were recorded on a weekly basis. A field study conducted in 1988 evaluated N, P, and K applied alone while in a 1989 field study N, P and K conbinations and interactions were evaluated. Applied alone, P and K had no effect on ET or shoot growth independent of the rate applied. Unless a high level of N was applied (588 kg ha⁻¹ yr⁻¹), N had no affect on shoot growth or ET. Shoot growth (clipping yield) and ET were highly correlated (r= 0.79, P≤0.001) in the single nutrient study. There was an interaction between N, P, and K on shoot growth and ET. Shoot growth response was highly correlated with ET response when fertilized in the normal range of P for the soil type evaluated (0, 21.5, 43 kg P ha⁻¹ yr⁻¹). Evapotranspiration rate responseto N, P, and K applied in combination were distinctly different from nutrients applied alone. At medium to high levels of N and P (294 kgN and 43 kg P ha ⁻¹ yr ⁻¹ and higher), water use increased in response to this species and soil type (147 kg N and 21.5 kg P ha⁻¹ yr⁻¹ and lower), increasing K levels minimized water use. Further research needed to study specific interactions. |
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| Language: | English |
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| References: | 23 |
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| See Also: | Other items relating to: Potassium |
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| Note: | Reprint appears in Research Committee Report for the 2000 Annual Members Meeting of the O. J. Noer Research Foundation, 2000, p. [19-28]
Figures
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Ebdon, J. S., A. M. Petrovic, and R. A. White. 1999. Interaction of nitrogen, phosphorous, and potassium on evapotranspiration rate and growth of Kentucky Bluegrass. Crop Sci. 39(1):p. 209-218. |
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| Web URL(s):
https://www.crops.org/publications/cs/pdfs/39/1/CS0390010209
Last checked: 08/05/2010
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: SB 183 .C7 |
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