Contrasting Nitrogen Fertilisation Rates Alter Mycorrhizal Contribution to Barley Nutrition in a Field Trial
Contrasting Nitrogen Fertilisation Rates Alter Mycorrhizal Contribution to Barley Nutrition in a Field Trial
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DOI：
10.3389/fpls.2019.01312
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发表时间：
2019-10
影响因子：
5.6
通讯作者：
Tom J. Thirkell;D. Cameron;A. Hodge
中科院分区：
文献类型：
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作者：
Tom J. Thirkell;D. Cameron;A. Hodge
控制环境研究表明，丛枝菌根真菌(AMF)可能促进植物氮素的吸收，但这些近乎无处不在的共生体在自然田间条件下对作物植株氮素营养的作用尚不清楚。在田间试验中，我们测试了氮肥和大麦的效果。根际土壤添加15N示踪剂对AMF对大麦氮素吸收贡献的品种认同。结果表明，AMF能显著增加植株从根隔离区对15N的吸收，这受氮素添加类型、氮肥施用量和大麦品种特性的影响。我们的数据显示了以前被忽视的作物植株氮素吸收的潜在途径，这种途径可能会因农业管理实践的变化而受到实质性和快速的影响。
Controlled environment studies show that arbuscular mycorrhizal fungi (AMF) may contribute to plant nitrogen (N) uptake, but the role of these near-ubiquitous symbionts in crop plant N nutrition under natural field conditions remains largely unknown. In a field trial, we tested the effects of N fertilisation and barley (Hordeum vulgare L.) cultivar identity on the contribution of AMF to barley N uptake using 15N tracers added to rhizosphere soil compartments. AMF were shown capable of significantly increasing plant 15N acquisition from root exclusion zones, and this was influenced by nitrogen addition type, N fertiliser application rate and barley cultivar identity. Our data demonstrate a previously overlooked potential route of crop plant N uptake which may be influenced substantially and rapidly in response to shifting agricultural management practices.