What question did this study set out to answer?

This research aims to identify optimal water and potassium management strategies to enhance potato yield and water productivity in sandy soils under different hydrological conditions.

May 22, 2026Agricultural Water ManagementOpen Access

Water–potassium interactions determine potato (Solanum tuberosum L.) yield and water productivity: Evidence from response surface modeling and PLS-PM structural equation analysis

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Authors

ZWZhangkai WangNorthwest A&F University JCJuan ChenAmicable Knowledge Solution University QLQuanguo LiuAmicable Knowledge Solution University

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Implication

Randomized trial investigates water–potassium interactions affecting potato yield and productivity in varying climates, suggesting optimal management practices.

Key Points

This research aims to identify optimal water and potassium management strategies to enhance potato yield and water productivity in sandy soils under different hydrological conditions.
Conducted a two-year field experiment in northern Shaanxi, China, during 2022–2023.
Applied three irrigation levels (60%, 80%, 100% ETc) and seven potassium rates (0–420 kg K ha−1).
Used bivariate quadratic regression and Partial Least Squares Path Model (PLS-PM) for analysis.
In 2022 (wet year), W2K5 (80% ETc and 420 kg K ha−1) yielded 53.37 t ha−1 and WPc of 12.43 kg ha−1 mm−1.
In 2023 (dry year), W3K4 (100% ETc and 240 kg K ha−1) yielded 45.88 t ha−1 and WPc of 9.44 kg ha−1 mm−1.
Yield positively influenced water productivity more than increased evapotranspiration negatively affected it.

Cite This Study

Wang et al. (2026) studied this question.

synapsesocial.com/papers/6a0ff2f5d674f7c03778b761 https://doi.org/10.1016/j.agwat.2026.110439

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Implication

Randomized trial investigates water–potassium interactions affecting potato yield and productivity in varying climates, suggesting optimal management practices.

Water–potassium interactions determine potato (Solanum tuberosum L.) yield and water productivity: Evidence from response surface modeling and PLS-PM structural equation analysis

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Implication

Key Points

Cite This Study

Water–potassium interactions determine potato (Solanum tuberosum L.) yield and water productivity: Evidence from response surface modeling and PLS-PM structural equation analysis

Discussion

Member takes

Implication

Key Points

Cite This Study

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