Full TGIF Record # 71140
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1080/01904169809365477
    Last checked: 10/13/2015
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Publication Type:
i
Report
Author(s):Sembiring, H.; Raun, W. R.; Johnson, G. V.; Stone, M. L.; Solie, J. B.; Phillips, S. B.
Author Affiliation:Sembiring, Raun, Johnson, and Phillips: Department of Plant and Soil Sciences; Stone and Solie: Department of Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, Oklahoma
Title:Detection of nitrogen and phosphorus nutrient status in bermudagrass using spectral radiance
Source:Journal of Plant Nutrition. Vol. 21, No. 6, 1998, p. 1189-1206.
# of Pages:17
Publishing Information:New York: Marcel Dekker, Inc.
Keywords:TIC Keywords: Nitrogen; Phosphorus; Nutrient availability; Spectral radiance; Cynodon dactylon; Measurement; Nitrogen uptake; Uptake; Biomass
Abstract/Contents:"Nitrogen (N) and phosphorus (P) are two of the most limiting nutrients for crop production. Because of this, continued interest focuses on improving N- and P-use efficiency. Spectral radiance measurements were evaluated to identify optimum wavelengths for dual dectection of N and P status in bermudagrass (Cynodon dactylon L.). A factorial arrangement of treatments (0, 112, 224, and 336 kg N ha⁻¹ and 0, 29, and 58 kg P ha⁻¹) was applied to an established bermudagrass pasture for further study using a randomized complete block design. A wide range of spectral radiance measurements (276-831 nm) was obtained from each plot using a PSD1000 Ocean Optics fiber optic spectrometer. The resulting spectra were partitioned in 10-nm bands. Added indices were generated to test for correlation of N and P content with spectral radiance. The 435-nm band (430-440 nm) was found to be independent of N and P treatment, and as a covariate, significantly decreased residual error. Using 435 nm as a covariate, it was found that biomass, N uptake, P uptake, and N concentration could be predicted using 695/405. No index reliably predicted bermudagrass forage P concentration. Spectral radiance has the potential to be used for predicting N and P nutrient status, but further work is needed to document response in different environments."
Language:English
References:13
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sembiring, H., W. R. Raun, G. V. Johnson, M. L. Stone, J. B. Solie, and S. B. Phillips. 1998. Detection of nitrogen and phosphorus nutrient status in bermudagrass using spectral radiance. J. Plant Nutr. 21(6):p. 1189-1206.
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Web URL(s):
http://www.tandfonline.com/doi/pdf/10.1080/01904169809365477
    Last checked: 10/13/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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