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| DOI: | 10.21273/HORTSCI.39.5.1130 |
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| Web URL(s): | https://journals.ashs.org/hortsci/view/journals/hortsci/39/5/article-p1130.xml?rskey=qzaWiM
Last checked: 11/19/2019
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Bell, G. E.;
Howell, B. M.;
Johnson, G. V.;
Raun, W. R.;
Solie, J. B.;
Stone, M. L. |
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| Author Affiliation: | Bell: Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, Oklahoma; Howell: Oklahoma State University, Tulsa, Oklahoma; Johnson and Raun: Department of Plant and Soil Science, Oklahoma State University, Stillwater, Oklahoma; Solie and Stone: Department of Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, Oklahoma |
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| Title: | Optical sensing of turfgrass chlorophyll content and tissue nitrogen |
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| Section: | Turf management
Other records with the "Turf management" Section
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| Source: | HortScience. Vol. 39, No. 5, August 2004, p. 1130-1132. |
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| Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
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| # of Pages: | 3 |
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| Keywords: | TIC Keywords: Chlorophyll; Nitrogen; Nutrition; Remote sensing; Cynodon dactylon; Cynodon transvaalensis; Agrostis stolonifera; Nitrogen fertilizers; Clippings; Color
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| Cultivar Names: | U3; Midfield; SR 1020 |
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| Abstract/Contents: | "Differences in soil microenvironment affect the availability of N in small areas of large turfgrass stands. Optical sensing may provide a method for assessing plant N needs among these small areas and could help improve turfgrass uniformity. The purpose of this study was to determine if optical sensing was useful for measuring turfgrass responses stimulated by N fertilization. Areas of `U3' bermudagrass [Cynodon dactylon 9L.) Pers.], `Midfield' bermudagrass [C. dactylon 9L.) Pers. × C. transvaalensis Burtt-Davy], and `SR1020' creeping bentgrass (Agrostis palustris Huds.) were divided into randomized complete blocks and fertilized with different N rates. A spectometer was used to measure energy reflected from the turfgrass within the experimental units at 350 to1100 [to 1100] nm wavelengths. This spectral information was used to calculate normalized difference vegetation index (NDVI) and green normalized difference vegetation index (GNDVI). These specral indices were regressed with tissue N and chlorophyll content determined from turfgrass clippings collected immediately following optical sensing. The coefficients of determination for NDVI and GNDVI regressed with tissue N averaged r2 = 0.76 and r2 = 0.81, respectively. The coefficients of determination for NDVI and GNDVI regressed with chlorophyll averaged r2 = 0.70 and r2 = 0.75, respectively. Optical sensing was equally effective for estimating turfrass responses to N fertilization as more commonly used evaluations such as shoot growth rate (SGR regressed with tissue N; r2 = 0.81) and visual color evaluation (color regressed with chlorophyll; r2 = 0.64)." |
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| Language: | English |
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| References: | 19 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bell, G. E., B. M. Howell, G. V. Johnson, W. R. Raun, J. B. Solie, and M. L. Stone. 2004. Optical sensing of turfgrass chlorophyll content and tissue nitrogen. HortScience. 39(5):p. 1130-1132. |
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| DOI: 10.21273/HORTSCI.39.5.1130 |
| Web URL(s):
https://journals.ashs.org/hortsci/view/journals/hortsci/39/5/article-p1130.xml?rskey=qzaWiM
Last checked: 11/19/2019
Requires: PDF Reader |
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MSU catalog number: SB 1 .H64 |
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