Significant alteration of soil bacterial communities and organic carbon decomposition by different long‐term fertilization management conditions of extremely low‐productivity arable soil in S outh C hina

作者：Weibing Xun, Zhao Jun, Chao Xue, Guishan Zhang, Wei Ran, Boren Wang, Qirong Shen, Ruifu Zhang · 发表于：Environmental Microbiology · 年份：2015 · DOI：10.1111/1462-2920.13098 · 被引用次数：188 · 研究领域：Soil Carbon and Nitrogen Dynamics、Agriculture, Soil, Plant Science、Legume Nitrogen Fixing Symbiosis

Different fertilization managements of red soil, a kind of Ferralic Cambisol, strongly affected the soil properties and associated microbial communities. The association of the soil microbial community and functionality with long-term fertilization management in the unique low-productivity red soil ecosystem is important for both soil microbial ecology and agricultural production. Here, 454 pyrosequencing analysis of 16S recombinant ribonucleic acid genes and GeoChip4-NimbleGen-based functional gene analysis were used to study the soil bacterial community composition and functional genes involved in soil organic carbon degradation. Long-term nitrogen-containing chemical fertilization-induced soil acidification and fertility decline and significantly altered the soil bacterial community, whereas long-term organic fertilization and fallow management improved the soil quality and maintained the bacterial diversity. Short-term quicklime remediation of the acidified soils did not change the bacterial communities. Organic fertilization and fallow management supported eutrophic ecosystems, in which copiotrophic taxa increased in relative abundance and have a higher intensity of labile-C-degrading genes. However, long-term nitrogen-containing chemical fertilization treatments supported oligotrophic ecosystems, in which oligotrophic taxa increased in relative abundance and have a higher intensity of recalcitrant-C-degrading genes but a lower intensity of labile-C-degrading genes. Quic...