Abstract

The study of the effect of plants with different type of mycorrhizal symbiosis on carbon, nitrogen, and phosphorus transformation in soils is important in view of the necessity to predict changes in nutrient cycles upon transformation of the structure of plant communities under changing environmental conditions. The impact of dwarf shrubs (Empetrum hermaphroditum, Vaccinium myrtillus, Vaccinium uliginosum, and Vaccinium vitis-idaea) with ericoid mycorrhiza (ERM) and shrub (Betula nana) with ectomycorrhiza (ECM) on the properties of Umbric Leptosol of grass meadow in tundra of the Khibiny Mountains has been studied. It is shown that the presence of plants with ERM and ECM causes an increase in the content of labile mineral and organic phosphorus and of extractable organic nitrogen in soil and in the C/N ratio in the microbial biomass and a decrease in the content of nitrates, N-mineralization and nitrification activity, and the C/N and C/P ratios in the extractable organic matter. The increased activity of glucosidase, chitinase, and phosphatase testifies to high activity of exoenzymes of ERM fungi even in soil with high availability of inorganic nitrogen and phosphorus.

中文翻译：

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类固醇和外生菌根植物对赤壁山苔原草草甸土壤特性的影响

摘要

考虑到必须预测在不断变化的环境条件下植物群落结构发生变化时养分循环的变化，研究具有不同类型菌根共生的植物对土壤中碳，氮和磷转化的影响非常重要。矮生灌木（Empetrum hermaphroditum，越桔越桔，越桔越桔和越桔越桔）与类固醇菌根（ERM）和灌木（桦木）的影响）与外生菌根（ECM）对Khibiny山冻土带草草甸的Umbric Leptosol的性质进行了研究。结果表明，具有ERM和ECM的植物的存在导致土壤中不稳定的矿物质和有机磷含量以及可提取的有机氮含量增加，微生物生物量的C / N比增加，硝酸盐含量减少，氮矿化和硝化活性以及可萃取有机物中的C / N和C / P比。葡糖苷酶，几丁质酶和磷酸酶活性的提高证明，即使在无机氮和磷利用率高的土壤中，ERM真菌的外切酶也具有很高的活性。