What question did this study set out to answer?

To evaluate plant water distribution mechanisms, interspecific competition, and vertical root stratification in wheat-maize intercropping systems using stable isotope tracing.

August 22, 2025Agricultural Water ManagementOpen Access

Stable water isotope analysis of plant-soil interspecific interactions in wheat-maize intercropping

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Authors

YLYingbo LiuHuawei Technologies (China)YCYuxian CuiGansu Academy of Agricultural Sciences LXLiang XueFujian Medical University

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Implication

Field study reveals root niche partitioning boosts yields and water use in wheat-maize intercropping, indicating optimized irrigation and row spacing strategies for arid agriculture.

Key Points

To evaluate plant water distribution mechanisms, interspecific competition, and vertical root stratification in wheat-maize intercropping systems using stable isotope tracing.
Conducted a field trial in semi-arid northwest China (Baiyin, Gansu; 209 mm annual precipitation) comparing monoculture wheat, monoculture maize, and wheat-maize intercropping.
Quantified soil water uptake across depths using hydrogen and oxygen stable isotopes (δ²H/δ¹⁸O) analyzed through the MixSIAR Bayesian mixing model.
Intercropping increased net area yields by 17% in wheat (7,877 kg/ha) and 58% in maize (27,959 kg/ha), while increasing intercropped maize net water use efficiency by 45% compared to monocultures.
Root stratification partitioned resource use, with wheat predominantly extracting shallow soil water and maize extracting deep water; border-row wheat absorbed water evenly across layers (33% shallow, 36% middle, 31% deep).
Middle-row maize achieved 75% higher flowering-stage biomass than border rows by sourcing 28% of water from the middle soil layer, while a 30 cm row spacing held competition intensity to 0.45.

Cite This Study

Liu et al. (2025) studied this question.

synapsesocial.com/papers/6a8d12120065a8c39bcdbae1 https://doi.org/10.1016/j.agwat.2025.109747

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Implication

Field study reveals root niche partitioning boosts yields and water use in wheat-maize intercropping, indicating optimized irrigation and row spacing strategies for arid agriculture.

Stable water isotope analysis of plant-soil interspecific interactions in wheat-maize intercropping

Discussion

Member takes

Implication

Key Points

Cite This Study

Stable water isotope analysis of plant-soil interspecific interactions in wheat-maize intercropping

Discussion

Member takes

Implication

Key Points

Cite This Study

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