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http://dx.doi.org/10.5307/JBE.2003.28.3.245

Measurement of Variability of Chlorophyll Contents in Paddy Fields Using Two Kinds of Chlorophyll Meter  

성제훈 (National Agricultural Mechanization Research Institute, RDA)
서상룡 (Dept. of Bio Systems & Agricultural Engineering, Institute of Ag. Sci. and Tech. Chonnam National University)
박우풍 (National Agricultural Mechanization Research Institute, RDA)
정인규 (National Agricultural Mechanization Research Institute, RDA)
김상철 (National Agricultural Mechanization Research Institute, RDA)
이충근 (National Agricultural Mechanization Research Institute, RDA)
Publication Information
Journal of Biosystems Engineering / v.28, no.3, 2003 , pp. 245-252 More about this Journal
Abstract
This study was investigated the possibility of measuring chlorophyll in paddy crops using two kinds of chlorophyll meters(SPAD-502, Field Scout). The results of correlation analysis showed the 0.7758(r$^2$) relationship between the chlorophyll contents of paddy leaves measured by SPAD and spectrophotometer. It indicates that chlorophyll content in paddy crops could be measured using the SPAD. Considering the data of the SPAD and Field Scout there was significant difference between their chlorophyll contents measured by the SPAD and Field Scout. Likewise, such results were consistent with the corrected data using light intensity. According to the results, it can be concluded that it is difficult to describe the rice chlorophyll measured by the Field Scout more accurately than the SPAD when using one standard spectrum and another spectrum for reflectance measuring. The chlorophyll variance measured at a research institute and a farmer's field revealed that the output of SPAD was more reliable than that of the Field Scout.
Keywords
Canopy; Chlorophyll; Field scout; Precision agriculture; Reflectance; SPAD;
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