Li CY Du CW Zeng Y Ma F Shen YZ Xing Z Zhou JM. 2-D Visualization of Nitrogen Distribution in Leaf of Chinese Cabbage (Brassica rapa Chinensis) by FTIR-PAS Technique. Journal of Agricultural and Food Chemistry 2016 doi: 10.1021-acs.jafc.6b03234
Abstract
Understanding nitrogen (N) status in the leaves of Chinese cabbage (Brassica rapa Chinensis) is of significance to both vegetable growth and quality control. Fourier transform infrared photoacoustic spectroscopy was used to perform rapid qualification of N distribution in leaf a partial least squares algorithm was used to develop a model for prediction of N content and N distribution in individual leaves was mapped based on interpolation analysis which was found to be variable. A reasonable N input level (12 mmol L-1 N) showed the largest variance of N content benefiting N redistribution and use efficiency but variance decreased at old stage. Moreover the pattern of N distribution within a leaf was irregular even among the replications performed for each treatment and sunlight was found to be the dominant factor because of leaves receiving variable light intensities.
