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2016 Xue Xia Ann Bot 117,363.pdf (1.31 MB)
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Crop acquisition of phosphorus, iron and zinc from soil in cereal/legume intercropping systems: a critical review

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journal contribution
posted on 2021-01-05, 05:07 authored by Y Xue, H Xia, P Christie, Z Zhang, L Li, Caixian TangCaixian Tang
(c) The Author 2016.
Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved.

Background Phosphorus (P), iron (Fe) and zinc (Zn) are essential elements for plant growth and development, but their availability in soil is often limited. Intercropping contributes to increased P, Fe and Zn uptake and thereby increases yield and improves grain nutritional quality and ultimately human health. A better understanding of how intercropping leads to increased plant P, Fe and Zn availability will help to improve P-fertilizer-use efficiency and agronomic Fe and Zn biofortification. Scope This review synthesizes the literature on how intercropping of legumes with cereals increases acquisition of P, Fe and Zn from soil and recapitulates what is known about root-to-shoot nutrient translocation, plant-internal nutrient remobilization and allocation to grains. Conclusions Direct interspecific facilitation in intercropping involves below-ground processes in which cereals increase Fe and Zn bioavailability while companion legumes benefit. This has been demonstrated and verified using isotopic nutrient tracing and molecular analysis. The same methodological approaches and field studies should be used to explore direct interspecific P facilitation. Both niche complementarity and interspecific facilitation contribute to increased P acquisition in intercropping. Niche complementarity may also contribute to increased Fe and Zn acquisition, an aspect poorly understood. Interspecific mobilization and uptake facilitation of sparingly soluble P, Fe and Zn from soil, however, are not the only determinants of the concentrations of P, Fe and Zn in grains. Grain yield and nutrient translocation from roots to shoots further influence the concentrations of these nutrients in grains.


We thank the anonymous reviewers and the handling editor for their constructive comments on the paper. Funding was provided by the National Natural Science Foundation of China (31501834), the High-Level Talents and Innovative Team Recruitment Program of the Shandong Academy of Agricultural Sciences, the Young Scientist Research Foundation of the Shandong Academy of Agricultural Sciences (2014QNM07), the Innovation Projects for Key Agricultural Technology Application for Shandong Province in China: High Efficient Use of Fertilizer and Water in the Rotation System of Wheat-Maize Intercropping with Peanut (2014), and by the Shandong Modern Agricultural Technology and Industry System.


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Annals of Botany






15p. (p. 363-377)


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