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Microbial Biomass in Paleosols under Burial Mounds as Related to Changes in Climatic Conditions in the Desert-Steppe Zone

机译:荒漠草原区古土下古土壤微生物生物量与气候条件变化的关系

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摘要

The contents of carbon in the total microbial biomass (C-TMB) and in the microorganisms reactivated with glucose (C-RG) and the portion of glucose-reactivated microorganisms in the microbial community (C-RG/C-TMB) were determined in paleosols buried under desert-steppe kurgans (burial mounds) 5100-3960 years ago and in the background surface light chestnut soils. In the paleosols, the corresponding indices reached 986 mug/g (C-TMB), 14.6 mug/g (C-RG), and 1.5% (C-RG/C-TMB) and were considerably lower than those in the background surface soil. The lowest values were found for the paleosols buried 4260-3960 years ago, which confirms a conclusion about the paleoecological crisis during this time interval.
机译:测定了微生物总生物量(C-TMB)和经葡萄糖活化的微生物(C-RG)中的碳含量,以及微生物群落中经糖活化的微生物部分(C-RG / C-TMB)的碳含量。埋在5100-3960年前的沙漠草原kurgans(埋葬土丘)下和背景浅表栗土中的古土壤。在古土壤中,相应的指数分别达到986杯/克(C-TMB),14.6杯/克(C-RG)和1.5%(C-RG / C-TMB),远低于背景表面的指数泥。在4260-3960年前埋藏的古土壤中发现了最低值,这证实了有关在此时间间隔内的古生态危机的结论。

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