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Additional file 1 of Application of biochar-coated urea controlled loss of fertilizer nitrogen and increased nitrogen use efficiency

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posted on 08.01.2021, 04:53 by Yiman Jia, Zhengyi Hu, Yuxin Ba, Wenfang Qi
Additional file 1:Fig. S1. SEM images of biochar used for biochar-coated urea. Fig. S2. FTIR spectra of biochar used for biochar-coated urea. The band at 1570 cm−1 correspond to keto C=O stretching vibrations in esters or C=C stretching vibrations in alkene and aromatic compounds; The band at 1030 cm−1 correspond to C–O stretching vibrations in lignin derivatives or alcohols and phenols”. Fig. S3. 13C NMR spectra of biochar used for biochar-coated urea. Resonance region at 110–150 ppm indicated aromatic carbon. Fig. S4. Schematic plot of ammonia volatilization collection.

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Ministry of Agriculture and Rural Affaris

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