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Effect of Long-Term Fertilization on Organic Nitrogen Functional Groups in Black Soil as Revealed by Synchrotron-Based X-Ray Absorption Near-Edge Structure Spectroscopy
其他题名同步辐射软X射线近边吸收谱方法研究长期施肥对黑土有机氮官能团的影响
Li, H; Gao, Q; Wang, S; Zhu, P; Zhang, JJ; Zhao, YD; Zhao YD(赵屹东)
2015
发表期刊SPECTROSCOPY AND SPECTRAL ANALYSIS
卷号35期号:7页码:2038-2042
摘要Nitrogen (N) is a common limiting nutrient in crop production. The N content of soil has been used as an important soil fertility index. Organic N is the major form of N in soil. In most agricultural surface soils, more than 90% of total N occurs in organic forms. Therefore, understanding the compositional characteristics of soil organic N functional groups can provide the scientific basis for formulating the reasonable farmland management strategies. Synchrotron radiation soft X-ray absorption near-edge structure (N K-edge XANES) spectroscopy is the most powerful tool to characterize in situ organic N functional groups compositions in soil. However, to our most knowledge, no studies have been conducted to examine the organic N functional groups compositions of soil Using N K-edge XANES spectroscopy under long-term fertilization practices. Based on a long-term field experiment (started in 1990) in a black soil (Gongzhuling, Northeast China), we investigated the differences in organic N functional groups compositions in bulk soil and clay-size soil fraction among fertilization patterns using synchrotron-based N Kedge XANES spectroscopy. Composite soil samples (0 similar to 20 cm) were collected in 2008. The present study included six treatments: farmland fallow (FALL), no-fertilization control (CK), chemical nitrogen, phosphorus, and potassium fertilization (NPK), NPK in combination with organic manure (NPKM), 1. 5 times of NPKM (1. 5 NPKM), and NPK in combination with maize straw (NPKS). The results showed that N K-edge XANES spectra of all the treatments under study exhibited characteristic absorption peaks in the ranges of 401. 2 similar to 401. 6 and 402. 7 similar to 403. 1 eV, which were assigned as amides/amine-N and pyrrole-N, respectively. These characteristic absorption peaks were more obvious in clay-size soil fraction than in bulk soil. The results obtained from the semi-quantitative analysis of N K-edge XANES spectra indicated that the relative proportion of amides/amine-N was the highest in both bulk soil and clay-size soil fraction, and it was the most major forms in soil organic nitrogen functional groups. Compared with the FALL treatment, the relative proportion of amide/amine-N was lower whereas that of Pyrrole-N was higher in the CK treatment. In the treatments with Combined chemical fertilizers and organic manure, the relative proportion of amide/amine-N decreased with increasing application rates of organic manure, while that of Pyrrole-N had an opposite trend. In bulk soil, the relative proportion of amide/amine-N was the highest for the NPKS treatment than for the other treatments. On the other hand, the relative proportion of nitrile/aromatic-N was the highest for the Fallow treatment than for the other treatments in clay-size soil fraction. It is feasible to use N K-edge XANES spectroscopy for characterizing in situ the changes of organic N functional groups in soil under different fertilization practices.
文章类型Article
关键词XANES Long-term fertilization Black soil Organic nitrogen functional group
学科领域Spectroscopy
DOI10.3964/j.issn.1000-0593(2015)07-2038-05
收录类别SCI ; EI
WOS类目Spectroscopy
WOS记录号WOS:000357761200055
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228597
专题多学科研究中心
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GB/T 7714
Li, H,Gao, Q,Wang, S,et al. Effect of Long-Term Fertilization on Organic Nitrogen Functional Groups in Black Soil as Revealed by Synchrotron-Based X-Ray Absorption Near-Edge Structure Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2015,35(7):2038-2042.
APA Li, H.,Gao, Q.,Wang, S.,Zhu, P.,Zhang, JJ.,...&赵屹东.(2015).Effect of Long-Term Fertilization on Organic Nitrogen Functional Groups in Black Soil as Revealed by Synchrotron-Based X-Ray Absorption Near-Edge Structure Spectroscopy.SPECTROSCOPY AND SPECTRAL ANALYSIS,35(7),2038-2042.
MLA Li, H,et al."Effect of Long-Term Fertilization on Organic Nitrogen Functional Groups in Black Soil as Revealed by Synchrotron-Based X-Ray Absorption Near-Edge Structure Spectroscopy".SPECTROSCOPY AND SPECTRAL ANALYSIS 35.7(2015):2038-2042.
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