期刊
MICROORGANISMS
卷 8, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/microorganisms8030424
关键词
saline-alkaline; nitrogen-cycling genes; soil bacterial community; environmental variables
类别
资金
- National Key Research and Development Program of China [2018YFD0800303, 2017YFD0800900]
- National Natural Science Foundation of China [41977144]
- Shandong Provincial Key Research and Development Program [2018GSF117024]
The Yellow River Delta (YRD) region is an important production base in Shandong Province. It encompasses an array of diversified crop systems, including the corn-wheat rotation system (Wheat-Corn), soybean-corn rotation system (Soybean-Corn), fruits or vegetables system (Fruit), cotton system (Cotton) and rice system (Rice). In this study, the communities of ammonia oxidizer-, denitrifier- and nitrogen (N)-fixing bacteria in those cropping systems were investigated by Illumina Miseq sequencing. We found that Rice soil exhibited significantly higher diversity indices of investigated N-cycling microbial communities than other crop soils, possibly due to its high soil water content. Wheat-Corn soils had higher abundances of nitrification gene amoA and denitrification genes nirK and nirS, and exhibited higher soil potential nitrification rate (PNR), compared with Soybean-Corn, Cotton and Fruit soils. Consistently, redundancy analysis (RDA) showed that soil water content (SWC), electrical conductivity (EC), and total nitrogen (TN) were the most important influencing factors of the diversity and structure of the investigated N-cycling microbial.
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