Eurasian Soil Science ( IF 1.4 ) Pub Date : 2022-04-22 , DOI: 10.1134/s1064229322040081 K. S. Dushchanova 1 , T. E. Khomutova 1 , N. N. Kashirskaya 1 , A. V. Borisov 1 , P. A. Ukrainskiy 2 , F. N. Lisetskii 2
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Abstract
Microbial biomass and functional diversity of soil microbial communities in forest soils of the Belogor’e Nature Reserve and in arable soils formed under similar geomorphologic and lithological conditions were determined. We have analyzed the content of carbon of total microbial biomass (C–TMB), of the biomass of living microorganisms by the content of soil phospholipids (C–PL.), and of biomass of microbial cells capable of glucose assimilation (C–SIR). The respiratory response of the soil microbial community to the introduction of different groups of organic compounds-inductors (amino acids and carboxylic acids) was assessed by the method of multisubstrate testing (MST). It is shown that anthropogenic transformation of natural ecosystems results in a decrease in the total microbial biomass, biomass of living cells, and cells that give a respiratory response to glucose. The functional diversity of microbial communities in soils in natural and transformed ecosystems significantly differs. Soil plowing has resulted in a significant decrease in the ability of the soil microbial community to assimilate low-molecular organic compounds. This is most typical for amino acids: arginine, alanine, and glycine (a 2.7-, 5.4-, and 7.1-time decrease, respectively, as compared to native soils). Among carboxylic acids, the decrease in the respiratory response to the introduction of succinic acid is the most pronounced (8.7 times). It has been revealed that the geomorphologic position in natural ecosystems does not affect the biomass of the microbial community and its functional diversity, while the arable soils are characterized by a clear tendency to an increase in these parameters on the lower part of the slope.
中文翻译：
Belogor'e 保护区原生和耕地土壤中的土壤微生物量和微生物群落的功能多样性
摘要
测定了 Belogor'e 自然保护区森林土壤和类似地貌和岩性条件下形成的耕地土壤中的微生物生物量和土壤微生物群落的功能多样性。我们分析了总微生物生物量中的碳含量（C-TMB），通过土壤磷脂含量（C-PL.）和能够同化葡萄糖的微生物细胞生物量（C-SIR）来分析活微生物的生物量。 ）。通过多底物测试（MST）方法评估土壤微生物群落对引入不同组有机化合物诱导剂（氨基酸和羧酸）的呼吸反应。结果表明，自然生态系统的人为改造导致总微生物生物量、活细胞生物量、以及对葡萄糖产生呼吸反应的细胞。自然生态系统和转化生态系统土壤中微生物群落的功能多样性存在显着差异。土壤耕作导致土壤微生物群落同化低分子有机化合物的能力显着降低。这对于氨基酸来说是最典型的：精氨酸、丙氨酸和甘氨酸（与天然土壤相比，分别减少了 2.7 倍、5.4 倍和 7.1 倍）。在羧酸中，对引入琥珀酸的呼吸反应降低最为显着（8.7 倍）。研究表明，自然生态系统中的地貌位置不影响微生物群落的生物量及其功能多样性，
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