SORPTION OF DISSOLVED ORGANIC-CARBON BY CERAMIC P-80 SUCTION CUPS

被引：26
作者：
GUGGENBERGER, G
ZECH, W
机构：
[1] Lehrstuhl für Bodenkunde und Bodengeographie, Universität Bayreuth, Bayreuth, W-8580
来源：
ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE | 1992年 / 155卷 / 02期
关键词：
D O I：
10.1002/jpln.19921550213
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
Comparison is made between the chemical composition of acid soil solutions percolated through new, acid-washed ceramic P 80 suction ups, and old, over 3 years field-equilibrated suction cups with respect to quantitative and qualitative changes of dissolved organic carbon (DOC). While new suction cups sorb DOC in significant amounts with hydrophobic constituents preferred, field-equilibrated suction cups alter DOC neither in concentration nor in composition. But at changes of DOC concentrations a percolation volume of 300 ml is necessary for reaching equilibrium. It is, therefore, concluded that field-equilibrated ceramic P 80 suction cups can be used for collecting DOC from mineral B and C horizons of acid forest soils, where DOC concentrations remain constant. In contrast, the suction cups investigated are unsuitable for collecting A horizon solutions, which show greater variations in DOC concentration.
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页码：151 / 155
页数：5
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