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首页> 外文期刊>Eurasian Soil Science >Seasonal dynamics of the microbiome of chernozems of the long-term agrochemical experiment in Kamennaya Steppe
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Seasonal dynamics of the microbiome of chernozems of the long-term agrochemical experiment in Kamennaya Steppe

机译：Kamennaya草原长期农业化学实验中黑钙质微生物组的季节动态

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摘要

The seasonal variability (spring-summer-autumn) of the taxonomic structure of prokaryotic microbiomes in chernozems of Kamennaya Steppe was studied using sequencing of the 16S rRNA gene. The samples were collected from the topsoil (0-20 cm) horizons of a long-term fallow and croplands differing in the rates of application of mineral fertilizers (NPK). The seasonal dynamics of the prokaryotic community in the soils of the fallow and croplands were similar: the summer samples significantly differed from the spring ones; in autumn, the microbiome structure approached that in spring; these changes were probably related to corresponding changes in the temperature and moisture conditions of the growing season. For all the plots, significant seasonal changes in the proportions of Thaumarchaeota (Cranarchaeota), Acidobacteria, Bacteroidetes, Firmicutes, and Verrucomicrobia phylogenetic groups were observed. The significant changes in the structure of the microbiomes (especially in the number of representatives of the Firmicutes, Cemmatiomonadetes, and Verrucomicrobia phyla) were revealed in the arable and fallow soils irrespectively of the season. The phylogenetic diversity estimated by the Shannon index, the number of the operating taxonomic units found, and the Chao1 index differed little in the soils of the studies plots. The long-term application of mineral fertilizers at different rates had little effect on the taxonomic structure and diversity of prokaryotic communities in the agrochernozems.
机译：利用16S rRNA基因测序研究了卡门纳亚草原黑钙土原核生物群的分类结构的季节性变化（春季-夏季-秋季）。样品是从长期休耕的表层土壤（0-20厘米）和农田中采集的，这些土地的肥料含量不同（矿物肥料（NPK））。休耕地和农田的土壤中原核生物群落的季节动态是相似的：夏季样品与春季样品显着不同。在秋天，微生物组结构接近春天。这些变化可能与生长期温度和湿度条件的相应变化有关。对于所有样地，观察到梭菌，酸杆菌，拟杆菌，硬毛菌和疣状微生物系统发生群的比例均出现明显的季节性变化。不论季节如何，在耕作土壤和休耕土壤中均显示出微生物群落结构的重大变化（尤其是硬菌纲，头孢单胞菌和门生微生物菌门的代表数量）。在研究区的土壤中，由Shannon指数，发现的操作分类单位数量和Chao1指数估算的系统发育多样性差异很小。长期施用不同比例的矿物肥料对农杆菌类的生物分类结构和原核生物多样性影响不大。

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