RED EDGE AS A POTENTIAL INDEX FOR DETECTING DIFFERENCES IN PLANT NITROGEN STATUS IN WINTER WHEAT

Autor:	William R. Raun, Yumiko Kanke, John B. Solie, Randal K. Taylor, Marvin L. Stone
Rok vydání:	2012
Předmět:	Biomass (ecology) Physiology viruses Winter wheat chemistry.chemical_element Red edge biochemical phenomena metabolism and nutrition Biology N status Nitrogen Normalized Difference Vegetation Index Agronomy chemistry Agronomy and Crop Science
Zdroj:	Journal of Plant Nutrition. 35:1526-1541
ISSN:	1532-4087 0190-4167
DOI:	10.1080/01904167.2012.689912
Popis:	Under certain conditions normalized difference vegetative index (NDVI) has low sensitivity; therefore red-edge position (REP) has been tested as an alternative vegetative index. The objective of this study was to determine if REP could be useful for detecting differences in N status for winter wheat compared to NDVI. A spectrometer, and the SPAD meter were used to measure N status. Sensitivity to plant N response and different growth stages was found for NDVI and REP, but NDVI sensitivity tended to decrease as N rate increased and REP sensitivity tended to increase with increased N rate and advancing growth stage. Both NDVI and REP were linearly correlated at all growth stages (r2 = 0.85). REP and SPAD meter readings were highly correlated (r2 = 0.62) as were NDVI and SPAD (r2 = 0.56). Overall, REP and NDVI sensitivity at high plant biomass were similar for winter wheat.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3c3e4a81ec91d16701301a4b8027a4f7 https://doi.org/10.1080/01904167.2012.689912 Zobrazit plný text záznamu