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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/92/3/423
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https://dl.sciencesocieties.org/publications/aj/articles/92/3/423
Last checked: 12/14/2016
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Rodriguez, Ian R.;
Miller, Grady L. |
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| Author Affiliation: | Rodriguez: Horticulture Department, Clemson University, Clemson, SC; and Miller: Environmental Horticulture Department, University of Florida, Gainesville, FL |
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| Title: | Using near infrared reflectance spectroscopy to schedule nitrogen applications on dwarf-type bermudagrasses |
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| Section: | Turfgrass management
Other records with the "Turfgrass management" Section
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| Source: | Agronomy Journal. Vol. 92, No. 3, May/June 2000, p. 423-427. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| # of Pages: | 5 |
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| Keywords: | TIC Keywords: Dwarf bermudagrasses; Cynodon dactylon; Cynodon transvaalensis; Nitrogen fertilization; Near-infrared reflectance spectroscopy; Minerals; Tissue culture; Thatch; Thatch accumulation; Nitrogen fertility; Evaluative methods; Application rates; Application frequency; Growth rate
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| Cultivar Names: | FloraDwarf; Tifdwarf |
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| Abstract/Contents: | "Due to the high rates of N fertility necessary for producing high-quality turfgrasses, quick, reliable methods of determining the N status of turfgrasses would be valuable management tools. The first objective of this study was to evaluate the use of near infrared reflectance spectroscopy (NIRS) to schedule N fertilization on two dwarf-type bermudagrasses [Cynodon dactylon (L.) Pers. X C. transvaalensis Burtt Davy]. The second objective was to test the accuracy of NIRS-predicted mineral tissue concentrations. The third objective was to study the effect of N fertility on thatch development. 'Tifdwarf' and 'FloraDwarf' bermudagrasses grown on sand-peat (9:1 by volume) were subjected to five treatments using time, NIRS-predicted N thresholds, and a visual quality rating threshold to schedule applications of (NH₄)SO₄ for 20 wk per growing season in 1997 and 1998. There were positive linear relationships between total Kjeldahl nitrogen (TKN) and NIRS-predicted N in 1997 (r²=0.76; slope=0.96) and 1998 (r²=0.92; slope=1.06). NIRS-scheduled fertility resulted in similar quality with less fertilizer than time or visual quality-based fertility. The NIRS mineral concentration predictions for K, Ca, Mg, Fe, Zn, Mn, and Cu were positively correlated with traditional laboratory methods, but there was not sufficient precision in measurements to use NIRS for determination of these nutrients. Thatch development and yields were greater in treatments receiving higher rates of fertilizers, suggesting that excessive growth rates due to high rates of applied fertilizer may have contributed to thatch development." |
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| Language: | English |
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| References: | 31 |
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| See Also: | Other items relating to: Bermudagrasses - Ultradwarf Cultivars |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Rodriguez, I. R., and G. L. Miller. 2000. Using near infrared reflectance spectroscopy to schedule nitrogen applications on dwarf-type bermudagrasses. Agron. J. 92(3):p. 423-427. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/92/3/423
Last checked: 12/14/2016
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Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/aj/articles/92/3/423
Last checked: 12/14/2016
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 22 .A45 |
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