Correlation of oxidases activities with the content of organic matter of different fractions in sod podzol loamy sand soil | Взаимосвязь активности оксидаз с содержанием разных фракций органического вещества в дерново-подзолистой супесчаной почве
2011
Mikhajlovskaya, N.A., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry | Mikanova, O., Crop Research Institute, Prague-Ruzyne (Czech Republic)
Biological investigations were conducted on sod podzol loamy sand soil during long-term field experiment. Three levels of soil fertility status were formed during the experiment as a result of application of different fertilizer systems. Quantitative estimation of correlations of oxidase activities with the content of different fractions of soil organic matter (SOM) is presented. A close correlation of oxidase activities with the content of inert fraction of SOM is identified. Determination coefficients R2 are as follows: 0.81–0.94 for peroxidase and 0.62–0.74 (Р less or equal 0.05) for polyphenoloxidase. It is established that oxidase activities have a weaker correlation with the content of active fraction of SOM: R2 for peroxidase is 0.35–0.45, for polyphenoloxidase – 0.35–0.55 (Р less or equal 0.05). The differences in correlation with different fractions of SOM enable to use the activity of soil oxidases more differentially while estimating soil biological status – as quantitative characteristics of the intensity of plant lignin humification.
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