C-13 NMR CHARACTERIZATION OF HUMIC ACIDS FROM SOILS OF A DEVELOPMENT SEQUENCE

被引：31

作者：

NEWMAN, RH ^{[1
]}

TATE, KR ^{[1
]}

机构：

[1] DSIR LAND RESOURCES, LOWER HUTT, NEW ZEALAND

来源：

JOURNAL OF SOIL SCIENCE | 1991年 / 42卷 / 01期

关键词：

D O I：

10.1111/j.1365-2389.1991.tb00089.x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Humic acids were isolated from nine topsoils in New Zealand tussock grasslands. Cross-polarization C-13 NMR spectra of solid samples were used to estimate fractions of carbon contained in different types of chemical functional groups. The degree of oxygen substitution of aromatic rings showed a strong negative correlation with soil development. Aromaticities greater than 0.25 were found in humic acids from only two least-developed soils.

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页码：39 / 46

页数：8

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