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Asymmetric facilitation induced by inoculation with arbuscular mycorrhizal fungi leads to overyielding in maize/faba bean intercropping

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Version 2 2019-12-20, 05:59
Version 1 2018-12-04, 20:37
journal contribution
posted on 2019-12-20, 05:59 authored by Guangzhou Wang, Chengcheng Ye, Junling Zhang, Liz Koziol, James D. Bever, Xiaolin Li

Understanding the effects of arbuscular mycorrhizal fungi (AMF) under different environmental contexts on overyielding in intercropping systems can be instructive in optimizing productivity and ecosystem services. A greenhouse study was conducted with maize and faba bean monocultures or intercropping at low phosphorus (P) and high P levels with three different water availabilities, and inoculated with or without AMF species Funneliformis mosseae. At low P level, overyielding was mainly due to the increase of maize biomass promoted by AMF relative to faba bean. Whereas in high P soils, overyielding was observed at all treatments, regardless of AMF. Inoculation of AMF significantly improved maize rather than faba bean P uptake, water use efficiency and photosynthesis rate, in particular at the low P level. This study identified the context dependence of AMF in influencing overyielding in maize/faba bean intercropping and demonstrates the importance of AMF in sustainable agricultural production.

Funding

This work was funded by the National Key Research and Development Program of China [grant number 2016YFE0101100], the Projects of the International Cooperation and Exchanges Program of NSFC [grant number 31210103906] and the National Basic Research Program of China [grant number 2015CB150405].

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    Journal of Plant Interactions

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