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首页> 外文期刊>Moscow University Soil Science Bulletin >Difference in the pH Values of Hydromorphic Soils in Field and Laboratory Analyses
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Difference in the pH Values of Hydromorphic Soils in Field and Laboratory Analyses

机译：田间和实验室分析中水质土壤pH值的差异

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摘要

There are marked differences in the pH values determined in water suspension under laboratory conditions and in soil solution under field conditions in hydromorphic soils (gleysols and stagnosols). The value 5pH = pHsusp — pHso, can be either positive or negative. Among the main factors that affect the value of 5pH are the laboratory preparation of soil samples and the suspension effect. The sign of the pH effect (value of SpH) depends on the participation of humus, carbonate, and exchange bases inthe formation of aggregates destructed in the laboratory. The value of SpH is negative in noncalcareous soils with low content of exchangeable bases and fulvate composition of humus and positive in calcareous soils or soils enriched with exchangeable bases and humate composition of humus. In cases of a significant SpH effect, the value of pHsusp cannot be regarded as an adequate measure of soil acidity.
机译：在实验室条件下的水悬浮液中和在田间条件下的土壤溶液中，在水状土壤中（pH值和水溶胶）的pH值存在明显差异。值5pH = pHsusp — pHso，可以为正或负。影响5pH值的主要因素包括土壤样品的实验室制备和悬浮效果。 pH效果的征兆（SpH值）取决于腐殖质，碳酸盐和交换碱参与实验室破坏的聚集体的形成。 SpH值在可交换碱含量低且腐殖质含量低的非钙质土壤中为负，在钙质土壤或富含可交换碱含量和腐殖质含量的土壤中为SpH值。在明显的SpH效应的情况下，不能将pHsusp的值视为土壤酸度的适当量度。

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