Arbuscular mycorrhizal fungi in soil and roots respond differently to phosphorus inputs in an intensively managed calcareous agricultural soil.
Arbuscular mycorrhizal fungi in soil and roots respond differently to phosphorus inputs in an intensively managed calcareous agricultural soil.
复制标题
土壤和根中的丛枝菌根真菌对集约化管理的钙质农业土壤中磷输入的反应不同
DOI：
10.1038/srep24902
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发表时间：
2016-04-22
影响因子：
4.6
通讯作者：
Zhang J
中科院分区：
文献类型：
--
作者：
Liu W;Zhang Y;Jiang S;Deng Y;Christie P;Murray PJ;Li X;Zhang J
了解丛枝菌根真菌(AMF)的多样性和群落结构，对于优化其在农业生态系统中开采磷(P)的作用具有重要意义。在此，我们进行了一项为期三年的综合研究，调查了石灰性土壤中AMF的垂直分布及其在施磷玉米根部的时间结构。结果表明，土壤速效磷对施磷量有一定的响应，但对玉米产量没有影响。除土壤深度较大外，施磷对土壤AMF丰富度的影响不显著。在所有采样条件下，高磷供应降低了根部定殖率，而适量P有增加定殖率和真菌丰富度的趋势。作物物候学在决定根际活性真菌群落组成时可能会超过供磷量。土壤AMF的群落结构在表层土壤中表现出明显的差异，群落结构的变化主要归因于速效P、N/P和pH的变化。垂直分布主要与土壤电导率和Na含量有关。结果表明，丛枝菌根真菌群落结构与施磷量、土壤深度和作物物候有关。重要的是，磷管理必须与其他农业实践相结合，以确保盐碱地农业生产的可持续性。
Understanding the diversity and community structure of arbuscular mycorrhizal fungi (AMF) is important for potentially optimizing their role in mining phosphorus (P) in agricultural ecosystems. Here, we conduct a comprehensive study to investigate the vertical distribution of AMF in a calcareous field and their temporal structure in maize-roots with fertilizer P application over a three-year period. The results showed that soil available-P response to P fertilization but maize yields did not. Phosphorus fertilization had no-significant effect on richness of AMF except at greater soil-depths. High P-supply reduced root colonization while optimum-P tended to increase colonization and fungal richness on all sampling occasions. Crop phenology might override P-supply in determining the community composition of active root inhabiting fungi. Significant differences in the community structure of soil AMF were observed between the controls and P treatments in surface soil and the community shift was attributable mainly to available-P, N/P and pH. Vertical distribution was related mainly to soil electrical conductivity and Na content. Our results indicate that the structure of AMF community assemblages is correlated with P fertilization, soil depth and crop phenology. Importantly, phosphorus management must be integrated with other agricultural-practices to ensure the sustainability of agricultural production in salinized soils.