INFLUENCE OF LIME ON SOIL RESPIRATION, LEACHING OF DOC, AND C/S RELATIONSHIPS IN THE MOR HUMUS OF A HAPLIC PODSOL

被引：37

作者：

ANDERSSON, S

VALEUR, I

NILSSON, I

机构：

[1] Department of Ecology and Environmental Research, Swedish University of Agricultural Sciences

[2] Department of Soil Sciences, Swedish University of Agricultural Sciences

来源：

ENVIRONMENT INTERNATIONAL | 1994年 / 20卷 / 01期

关键词：

D O I：

10.1016/0160-4120(94)90070-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Mor humus samples from separate plots in ii field-liming experiment in southern Sweden were incubated in a leaching experiment. Lime applications of 0.16, 0.35, and 0.88 kg/m(2) dolomite lime were made 7 y before sampling. The leachates from the two highest lime applications had a pH of 7.0 and 5.3, respectively. The control and the lowest lime application had a pH of 3.9. Humus material receiving the largest lime application also showed the highest level of dissolved organic carbon (DOC) leaching (180 mg DOC/L) during the first 100 d of the experiment, probably owing to the increased negative charge caused by the high pH, which increased the solubility. The DOC concentration decreased in all treatments towards the end of the experiment owing to an increase in protonation caused by nitrate formation (nitrification). The C/S ratio in the organic matter of the leachates from the limed humus was lower than that in the control leachates. A positive correlation between DOC leaching and biological activity, measured as soil respiration, was found in humus material that had received the two highest lime applications.

引用

页码：81 / 88

页数：8

共 22 条

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