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ESTIMATING WATER STRESSED DWARF GREEN BEAN PIGMENT CONCENTRATION THROUGH HYPERSPECTRAL INDICES

EYÜP SELİM KÖKSAL¹, HALUK ÜSTÜN², HESNA ÖZCAN³ AND ATİLLA GÜNTÜRK³

Abstract: In this study, the relationship between leaf pigment concentration (analyzed in the laboratory) and four spectral indexes (measured in the field) was investigated. For this purpose, field experiments consisting of six different irrigation treatments were conducted with dwarf green beans during 2005 growing season. Based on spectral data, spectral indexes were plotted against pigment concentration. Results showed that under water stress, the chlorophyll and carotene contents of green bean leaves rose. According to linear regression analysis between spectral indexes and pigment contents, the Normalized Difference Pigment Chlorophyll Index (NPCI) and Normalized Difference Vegetation Index (NDVI) had the highest correlations with the chlorophyll (a, b and total), and carotene content of leaves.

¹Department of Agricultural Structures, Ondokuz Mayıs University, Agricultural Faculty, and Irrigation, Kurupelit, Samsun, Turkey

²International Agricultural Training Center, Yenimahalle, Ankara, Turkey

³Soil Fertilizer and Water Resources Central Research Institute, Yenimahalle, Ankara, Turkey