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Rapid diagnosis of nutrient elements in fingered citron leaf using near infrared reflectance spectroscopy


, : Rapid diagnosis of nutrient elements in fingered citron leaf using near infrared reflectance spectroscopy. Journal of Plant Nutrition 35(11): 1725-1734

In order to provide references for leaf nutrition diagnosis of fingered citron, the technique of near infrared reflectance spectroscopy (NIRS) was introduced to analyze nitrogen (N), phosphorus (P), potassium (K), iron (Fe), manganese (Mn), zinc (Zn), and copper (Cu) in the dry-leaf samples of fingered citron. The best calibration model for N was developed with high RSQCAL (.9), SD/SECV (2.73) and low SEC (1.6 mg g?1), good calibration models were obtained for P, K, Fe and Mn, and no significant correlations were found between the spectra and the individual amounts of Zn and Cu. When tested using a validation set (n = 38), N was well predicted with low values of SEP (1.21 mg g?1) and high RPD (2.5). The values of SEP and RPD were also acceptable for the external validation of P, Fe and Mn. Near-infrared spectroscopy analysis technique shows potential of diagnosing minerals in fingered citron, particularly for N, P, Fe and Mn.

US$19.90

DOI: 10.1080/01904167.2012.698352


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