Identifying microbial drivers promoting plant growth on soil amended with composted aquatic plant: insight into nutrient transfer from aquatic to terrestrial systems
Identifying microbial drivers promoting plant growth on soil amended with composted aquatic plant: insight into nutrient transfer from aquatic to terrestrial systems
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DOI：
10.1007/s10201-020-00613-3
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发表时间：
2020-03
期刊：
影响因子：
1.6
通讯作者：
Shunsuke Matsuoka;Y. Kobayashi;S. Hobara;T. Osono
中科院分区：
文献类型：
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作者：
Shunsuke Matsuoka;Y. Kobayashi;S. Hobara;T. Osono
研究了施用水生植物堆肥对土壤化学、土壤微生物（真菌和细菌）以及栽培植物生长的影响。为了确定促进栽培植物生长的驱动因素，通过假设施用堆肥水生植物、土壤化学、土壤微生物和栽培植物生长之间的因果关系，将盆栽实验的经验数据纳入结构方程模型。施用水生植物堆肥后，种植植物生长量、土壤总碳含量、土壤细菌和真菌丰度均有所增加，土壤细菌和真菌群落组成存在显著差异。结构方程模型明确表明，细菌组合相比，土壤化学的相对重要性作为一个促进剂的栽培植物生长的应用堆肥水生植物。本研究是第一次证明，堆肥水生植物对陆生植物生长的积极影响是由土壤微生物过程介导的。我们的研究结果可以提供基本的见解，通过人类活动的营养物质从水生系统到陆地系统的转移和循环。
Effects of applying composted aquatic plants on soil chemistry, soil microbes (fungi and bacteria), and the growth of cultivated plant were demonstrated. To identify drivers promoting cultivated plant growth on soil amended with composted aquatic plant, empirical data of pot experiments were incorporated into structural equation models by hypothesizing causal relationships between the application of composted aquatic plants, soil chemistry, soil microbes, and cultivated plant growth. Cultivated plant growth, total carbon content, and bacterial and fungal richness in soil increased on soil applied with composted aquatic plants, and the composition of bacterial and fungal assemblages in soil were significantly different among the application treatments. Structural equation models explicitly demonstrated the relative importance of bacterial assemblages compared to soil chemistry as a promoter of cultivated plant growth in response to the application of composted aquatic plants. The present study is the first to demonstrate that the positive effects of composted aquatic plants on terrestrial plant growth are mediated by soil microbial processes. Our results could provide basic insights into the transfer and cycling of nutrients from aquatic to terrestrial systems through human activities.