Nitrogen Fertilizer Driven Bacterial Community Structure in a Semi-Arid Region of Northeast China

文献类型： 外文期刊

第一作者： Wang, Meng

作者： Wang, Meng;Li, Qian;Wang, Lichun;Wang, Ling;Liu, Hang;Lin, Yuan

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关键词： bacterial community; Illumina MiSeq sequencing; nitrogen fertilization; soil properties

期刊名称：SUSTAINABILITY （ 影响因子：3.251； 五年影响因子：3.473 ）

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年卷期： 2021 年 13 卷 21 期

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收录情况： SCI

摘要： The soil nitrogen (N) cycle is an essential role of the biogeochemical cycle. Bacteria play an irreplaceable part in the soil N cycle, but the impact of different N gradients on bacterial communities remains unclear. The purpose of this research was to explore the bacterial abundance, community composition, and diversity under different N application rates in a water-limited area. We investigated the bacterial abundance, diversity, community composition, and structure under five different N gradients (0, 90, 150, 210, and 270 kg ha(-1)) using real-time quantitative PCR and high-throughput sequencing, and then explored bacterial functional groups with FAPROTAX. N application significantly affected bacterial abundance and community composition. Bacterial diversity was enhanced at low N application rates and reduced at higher N application rates. Principal coordinate analysis showed that bacterial community structure was separated into two groups between low N application rates and high N application rates; these differences in bacterial community structure may be driven by available nitrogen (AN). The results of FAPROTAX revealed that N application promoted the functions of Aerobic_nitrite_oxidation, Nitrate_reduction, and Aerobic_ammonia_oxidation, but inhibited the Nitrogen_fixation function of the bacterial community. The high N network caused the reduction of network structure stability. Our results revealed that N fertilizer driven bacterial community structure and soil nutrients were the main influential factors in the variation of bacterial community structure. We suggest that the optimal N application rate in this study may be approximately 150 kg ha(-1), based on the variations of soil properties and bacterial community structure in semi-arid areas.

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