Chemodestructive fractionation of soil organic matter
- 作者: Popov A.1, Rusakov A.1
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隶属关系:
- St. Petersburg State University, Vasil’evskii Ostrov
- 期: 卷 49, 编号 6 (2016)
- 页面: 606-612
- 栏目: Soil Chemistry
- URL: https://journals.rcsi.science/1064-2293/article/view/223397
- DOI: https://doi.org/10.1134/S1064229316060107
- ID: 223397
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详细
The method of chemodestructive fractionation is suggested to assess the composition of soil organic matter. This method is based on determination of the resilience of soil organic matter components and/or different parts of organic compounds to the impact of oxidizing agents. For this purpose, a series of solutions with similar concentration of the oxidant (K2Cr2O7), but with linearly increasing oxidative capacity was prepared. Chemodestructive fractionation showed that the portion of easily oxidizable (labile) organic matter in humus horizons of different soil types depends on the conditions of soil formation. It was maximal in hydromorphic soils of the taiga zone and minimal in automorphic soils of the dry steppe zone. The portion of easily oxidizable organic matter in arable soils increased with an increase in the rate of organic fertilizers application. The long-lasting agricultural use of soils and burying of the humus horizons within the upper one-meter layer resulted in the decreasing content of easily oxidizable organic matter. It was found that the portion of easily oxidizable organic matter decreases by the mid-summer or fall in comparison with the spring or early summer period.
作者简介
A. Popov
St. Petersburg State University, Vasil’evskii Ostrov
编辑信件的主要联系方式.
Email: paihumic@gmail.com
俄罗斯联邦, Shestnadtsataya liniya 29, St. Petersburg, 199178
A. Rusakov
St. Petersburg State University, Vasil’evskii Ostrov
Email: paihumic@gmail.com
俄罗斯联邦, Shestnadtsataya liniya 29, St. Petersburg, 199178