Pedosphere 20(3): 326--333, 2010
ISSN 1002-0160/CN 32-1315/P
©2010 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Inhibitory effects of aromatic compounds on soil nitrification |
ZHANG Li-Li1, WU Zhi-Jie 1, SHI Yun-Feng1,2, CHEN Li-Jun1, SONG Yu-Chao3 and JUAN Ying-Hua1,2 |
1 Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016 (China);
2 Graduate University of the Chinese Academy of Sciences, Beijing 100049 (China);
3 College of Resource and Environment, Shenyang Agricultural University, Shenyang 110039 (China) |
| ABSTRACT |
| Aromatic compounds (ACs) in soil can induce competitive inhibition for soil NH3 oxidation, and nitrification inhibitors can be used to this end. A laboratory incubation experiment was performed with 12 nitroaromatic compounds (NACs), 15 amidoaromatic compounds (AACs) and 20 hydroxyaromatic compounds (HACs) to assess the inhibitory effects of ACs on soil nitrification. Based on these results, the critical and optimal concentrations of ACs were determined for better inhibitory effects. Most of the test ACs were able to inhibit soil nitrification; the effectiveness differed with soil type. Among the ACs, the NACs with m-nitryl, amino or hydroxyl and the AACs with a nitro group or a chlorine atom on aromatic ring or with a p-hydroxyl were more effective. 3-nitroaniline, 4-aminophenol and 3-nitrophenol showed the greatest potential as nitrification inhibitors. The critical concentration of these compounds in brown soil and cinnamon soil was found to be 0.5 mg kg-1 soil. Due to the toxicity, carcinogenicity and mutagenicity of ACs, further toxicological and ecotoxicological research is necessary before ACs are used as nitrification inhibitors in agricultural and horticultural practices. |
| Key Words: amidoaromatic compounds, ammonia oxidation, hydroxyaromatic compounds, nitrification inhibition, nitroaromatic compounds |
| Citation: Zhang, L. L., Wu, Z. J., Shi, Y. F., Chen, L. J., Song, Y. C. and Juan, Y. H. 2010. Inhibitory effects of aromatic compounds on soil nitrification. Pedosphere. 20(3): 326-333. |
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