气候变化领域集成服务门户(CCPortal): Mycorrhizal fungi-mediated uptake of tree-derived nitrogen by maize in smallholder farms

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DOI	10.1038/s41893-021-00791-7
	Mycorrhizal fungi-mediated uptake of tree-derived nitrogen by maize in smallholder farms
	Dierks J.; Blaser-Hart W.J.; Gamper H.A.; Six J.
发表日期	2021
ISSN	2398-9629
英文摘要	Trees within farmers’ fields can enhance systems’ longer-term productivity, for example, via nutrient amelioration, which is indispensable to attain sustainable agroecosystems. While arbuscular mycorrhizal fungi (AMF) are known to improve plant access to soil nutrients, the potential of AMF to mediate nutrient uptake of tree-derived nitrogen (N) by crops from beyond the crops’ rooting zones is unclear. We hypothesized that AMF quantitatively contribute to the crop uptake of tree-derived N. We set up root- and AMF-exclusion and control plots around faidherbia trees (Faidherbia albida) and used the 15N natural abundance technique to determine the magnitude of AMF-mediated uptake of tree-derived N by maize from beyond its rooting zone in smallholder fields. We further tested whether AMF-mediated N uptake decreases with distance from tree. We show that within one cropping season, maize obtained approximately 35 kg ha–1 biologically fixed N from faidherbia. One-third of tree-derived N in maize leaves was attributed to AMF-mediated N uptake from beyond the maize rooting zone and two-thirds to N from tree leaf litter, regardless of distance from tree. As hypothesized, maize grown close (1 m) to faidherbia obtained significantly more tree-derived N than that at farther distances (4 and 5 m). Thus, the faidherbia–AMF association can enhance agroecosystem functioning. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	Crops; Ecosystems; Forestry; Fungi; Nitrogen; Agro-ecosystems; Arbuscular mycorrhizal fungi; Crop uptake; Cropping seasons; Mycorrhizal fungus; N uptakes; Natural abundance; Nutrient uptake; Rooting zones; Soil nutrients; Nutrients
来源期刊	Nature Sustainability
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249887
作者单位	Sustainable Agroecosystems Group, Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland; Agroecology and Sustainable Agricultural Systems, Department of Environmental Science, Policy, and Management, University of California Berkeley, Berkeley, CA, United States; School of Biological Sciences, The University of Queensland, Brisbane, QLD, Australia; Plant Nutrition Group, Department of Environmental Systems Science, ETH Zürich, Lindau, Switzerland; Animal Science, Faculty of Science and Technology, Free University of Bolzano, Bozen-Bolzano, Italy
推荐引用方式 GB/T 7714	Dierks J.,Blaser-Hart W.J.,Gamper H.A.,et al. Mycorrhizal fungi-mediated uptake of tree-derived nitrogen by maize in smallholder farms[J],2021.
APA	Dierks J.,Blaser-Hart W.J.,Gamper H.A.,&Six J..(2021).Mycorrhizal fungi-mediated uptake of tree-derived nitrogen by maize in smallholder farms.Nature Sustainability.
MLA	Dierks J.,et al."Mycorrhizal fungi-mediated uptake of tree-derived nitrogen by maize in smallholder farms".Nature Sustainability (2021).