FRACTIONAL PRECIPITATION OF SOIL HUMIC ACID BY AMMONIUM SULPHATE

被引：9

作者：

THENG, BKG

WAKE, JRH

POSNER, AM

机构：

[1] Department of Soil Science and Plant Nutrition, Institute of Agriculture, University of Western Australia, Nedlands, Western Australia

来源：

PLANT AND SOIL | 1968年 / 29卷 / 02期

关键词：

D O I：

10.1007/BF01348949

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

A number of fractions have been obtained from a soil humic acid by salting-out and by leaching with ammonium sulphate. The fractions obtained are characterised by infra-red and ultra-violet spectroscopy and osmometry. The fractions removed at relatively low saturation with ammonium sulphate are less highly charged and contain more aliphatic hydrocarbon groups per unit weight than the fractions precipitated at high concentrations of salt. In addition, the number average molecular weight of successive fractions precipitated with ammonium sulphate decreases significantly. © 1968 Martinus Nijhoff.

引用

页码：305 / &

共 19 条

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