NEIGAE OpenIR
Rhizobacterial community structure in response to nitrogen addition varied between two Mollisols differing in soil organic carbon
T. X. Lian, Z. H. Yu, J. J. Liu, Y. S. Li, G. H. Wang, X. B. Liu, S. J. Herbert, J. J. Wu and J. Jin
2018
发表期刊Scientific Reports
卷号8
摘要Excessive nitrogen (N) fertilizer input to agroecosystem fundamentally alters soil microbial properties and subsequent their ecofunctions such as carbon (C) sequestration and nutrient cycling in soil. However, between soils, the rhizobacterial community diversity and structure in response to N addition is not well understood, which is important to make proper N fertilization strategies to alleviate the negative impact of N addition on soil organic C and soil quality and maintain plant health in soils. Thus, a rhizo-box experiment was conducted with soybean grown in two soils, i.e. soil organic C (SOC)-poor and SOC-rich soil, supplied with three N rates in a range from 0 to 100 mg N kg(-1). The rhizospheric soil was collected 50 days after sowing and MiSeq sequencing was deployed to analyze the rhizobacterial community structure. The results showed that increasing N addition significantly decreased the number of phylotype of rhizobacteria by 12.3%, and decreased Shannon index from 5.98 to 5.36 irrespective of soils. Compared to the SOC-rich soil, the increases in abundances of Aquincola affiliated to Proteobacteria, and Streptomyces affiliated to Actinobacteria were greater in the SOC-poor soil in response to N addition. An opposite trend was observed for Ramlibacter belong to Proteobacteria. These results suggest that N addition reduced the rhizobacterial diversity and its influence on rhizobacterial community structure was soil-specific. AimsThe aim of the study was to survey rhizobial biogeography and to inoculate soybean with selected rhizobia in China to enhance symbiotic nitrogen fixation (SNF). Methods and ResultsBiogeography, genetic diversity and phylogeny of soybean rhizobia were surveyed. Inocula were prepared and applied to soybean. Results showed that Bradyrhizobium elkanii and Ensifer fredii were widely distributed in acid and alkaline soils respectively. Available iron was detected as the first determinant for distribution of the two rhizobia and the soybean varieties did not greatly affect the rhizobial compatibility. Geographical latitude and precipitation in June were the main geographical and climatic factors affecting the rhizobial distribution. Inoculation with selected rhizobia increased the nodule number, fresh weight, occupation ratio, seed protein content and soybean yields. ConclusionsSelection and application of effective soybean rhizobia across China according to biogeography were clarified to promote the SNF, thereby improving soybean yield.
文献类型期刊论文
条目标识符http://ir.iga.ac.cn/handle/131322/9244
专题中国科学院东北地理与农业生态研究所
作者单位中国科学院东北地理与农业生态研究所
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GB/T 7714
T. X. Lian, Z. H. Yu, J. J. Liu, Y. S. Li, G. H. Wang, X. B. Liu, S. J. Herbert, J. J. Wu and J. Jin. Rhizobacterial community structure in response to nitrogen addition varied between two Mollisols differing in soil organic carbon[J]. Scientific Reports,2018,8.
APA T. X. Lian, Z. H. Yu, J. J. Liu, Y. S. Li, G. H. Wang, X. B. Liu, S. J. Herbert, J. J. Wu and J. Jin.(2018).Rhizobacterial community structure in response to nitrogen addition varied between two Mollisols differing in soil organic carbon.Scientific Reports,8.
MLA T. X. Lian, Z. H. Yu, J. J. Liu, Y. S. Li, G. H. Wang, X. B. Liu, S. J. Herbert, J. J. Wu and J. Jin."Rhizobacterial community structure in response to nitrogen addition varied between two Mollisols differing in soil organic carbon".Scientific Reports 8(2018).
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