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Spatiotemporal differences in the arbuscular mycorrhizal fungi communities in soil and roots in response to long-term organic compost inputs in an intensive agricultural cropping system on the North China Plain


Spatiotemporal differences in the arbuscular mycorrhizal fungi communities in soil and roots in response to long-term organic compost inputs in an intensive agricultural cropping system on the North China Plain



Journal of Soils and Sediments 19(5): 2520-2533



ISSN/ISBN: 1439-0108

DOI: 10.1007/s11368-019-02244-3

Purpose: Fertilizer management is important for minimizing nutrient losses from intensive agroecosystems. An increasing amount of organic fertilizer has been applied to overcome the problems associated with mineral fertilizers. Thus, an understanding of the diversity and community structure changes in arbuscular mycorrhizal fungi (AMF) in response to long-term organic fertilizer management can be potentially significant in the development of nutrient management strategies. Materials and methods: Here, a study was conducted to investigate the vertical distribution of AMF in a calcareous field and the temporal structure of AMF in maize roots with different levels of continuous fertilization over a 13-year period. T-RFLP and clone library construction were used to investigate AMF community in this study. Canonical correspondence analysis was performed to determine the significance of environmental variable that may affect the AMF community composition. Results and discussion: Our results showed that the Shannon-Weiner and evenness indexes of soil AMF community decreased, while AMF richness was not significantly affected. Organic compost application reduced root colonization, while the negative influence of conventional inorganic fertilization was minor. The effect was significant at 13 leaf collar stage of maize. Crop phenology especially growth stages might override fertilizer supply in determining the community composition of active root inhabiting AM fungi. Significant differences in the community structure of soil AMF were observed between control and organic compost treatments in surface soil, and the community shift was primarily attributable to soil organic matter and nutrient contents (total nitrogen and carbon, Olsen-P, and exchangeable K). Vertical distribution of AMF was significantly related to soil electrical conductivity and pH values. Conclusions: Our results indicated that AMF community assemblage was complex and dependent on fertilization-mediated changes in soil properties, soil depth, and crop phenology. The modification of AMF communities by fertilization may have great impact on soil health and ecosystem services in intensive agroecosystems.

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Accession: 070918025

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