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首页> 外文期刊>Soil Science and Plant Nutrition >Comparison of carbon skeletal structures in black humic acids from different soil origins
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Comparison of carbon skeletal structures in black humic acids from different soil origins

机译：不同土壤起源中黑色腐殖酸碳骨架结构的比较

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摘要

Andosols are characterized by an abundance of black humic acids (HAs) belonging to Type A with a high content of aromatic carbon (C) in particular condensed aromatic C. Black HAs are also observed in other soils, such as Chernozems and the subsoil of paddy field, and extracted after washing with an acid or using chelating agent such as sodium pyrophosphate (Na4P2O7). However, contribution of condensed aromatic structures to those soil HAs are unknown. To obtain the information about C skeletal structures of black HAs in soils other than Andosols, HAs were obtained from 2 Chinese Chernozem samples, 2 subsoil samples from Japanese paddy fields (Fulvisols), and a Rendzina-like soil (Cambisols) as well as an Andosol sample (reference) by successive extraction with 0.1 M NaOH (HAs1) and 0.1 M Na4P2O7 (HAs2), and C-13 nuclear magnetic resonance and X-ray diffraction 11-band profile analyses were applied. In the black HAs2 from the non-Andosol samples, the proportion of C present as aromatic C, size of C layer planes, and relative C layer plane content ranged from 52 to 59%, 0.48 to 1.92nm (mean size, 0.76-0.91nm), and 58 to 100 AU (arbitrary unit) mg(-1), respectively, with a positive correlation between total C layer plane content and the degree of humification. Those ranges were similar to the distribution ranges of Andosols HAs1 reported by our previous study.
机译：糖醇的特征在于，具有型A型芳族碳（C）的黑色腐殖酸（具有）特别是浓缩芳族C.黑色在其他土壤中观察到浓缩芳族C. Black，如Chernozems和稻谷的底层用酸洗涤或使用螯合剂如焦磷酸钠（Na 4P2O7）洗涤后，萃取。然而，浓缩的芳香结构对那些土壤的贡献已经未知。为了获得关于Black的C骨骼结构的信息，该信息来自Andosols以外的土壤，是从2种Chernozem样品中获得的2种来自日本稻田（Fulvisols）的替索尔样品，以及Rendzina样的土壤（Cambisol）以及一个施用0.1M NaOH（HAVE1）和0.1M NA4P2O7（HAS2）和0.1M NA4P2O7（HAS2）和C-13核磁共振和X射线衍射11带曲线分析，通过连续提取和溶胶样品（参考）。在非血糖样品中的黑色HAS2中，作为芳香族C，C层平面的C的比例，C层平面的尺寸和相对C层面积范围为52至59％，0.48至1.92nm（平均尺寸，0.76-0.91 NM）和58至100 AU（任意单位）Mg（-1）分别具有总C层平面含量与蜂窝程度之间的正相关性。这些范围类似于我们以前的研究报告的Andosols的分布范围。

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