SPAD-502 and atLEAF CHL PLUS values provide good estimation of the chlorophyll content for Hevea brasiliensis Müll. Arg. Leaves

10/12/2020 11:03:16 AM

Menara Perkebunan 2020, 88(1), 1-8 p-ISSN: 0125-9318/ e-ISSN: 1858-3768

Andi Nur CAHYO1)2)*), Rudi Hari MURTI2), Eka TS PUTRA2), Tri R NURINGTYAS3), Denis FABRE4) & Pascal MONTORO4)
1) Pusat Penelitian Karet, Jl. Palembang-Pangkalan Balai km.29, PO Box 1127, Palembang 30001 2)Fakultas Pertanian UGM, Jl. Flora, Bulaksumur, Depok, Sleman, Yogyakarta 3)Fakultas Biologi UGM, Jl. Teknika Selatan, Senolowo, Sinduadi, Mlati, Sleman, Yogyakarta 4)CIRAD, UMR AGAP, F-34398 Montpellier, France

Rubber leaves index values observed by SPAD- 502 and atLEAF CHL PLUS were closely correlated, hence both of the devices can substitute each other. In addition, the correlation between atLEAF CHL PLUS and SPAD-502 values with absolute chlorophyll content of clone SP 217, PB 260, GT1, and all clones (general) were significant with a high coefficient of determination (R2) as well as low RMSE and CV. Therefore, both atLEAF CHL PLUS and SPAD-502 can be used to make fast and nondestructive prediction of chlorophyll content of rubber plant leaf. The equation to convert relative indicator of chlorophyll content value of general rubber leaf to estimated (absolute) total chlorophyll content were y = 0.0203x + 0.3451 for SPAD-502 and y = 0.0247x - 0.0615 for atLEAF CHL PLUS, where y = estimated chlorophyll content (mg/g) and x = SPAD-502 or atLEAF CHL PLUS index value.

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