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An integrated evaluation of climatic suitability for summer peanut at county level by coupling drought-waterlogging risk with potential productivity: a case study in Henan province, China

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Abstract 

Develo** a reasonable crop planting layout under climate change is critical for improving peanut yield and alleviating the contradiction of edible oil in China. Henan province is strengthening summer peanut production, and the summer peanut climatic suitability was evaluated from 1981 to 2019 at county level by coupling drought-waterlogging risk with potential productivity. Two yield levels, i.e., yield potentials under well-watered conditions (Yp) and under rainfed conditions (Yrp) simulated by Agricultural Production Systems sIMulator (APSIM-Peanut), were considered to indicate the potential productivity under different growing environments. Higher Yp (or Yrp) mainly located in the northern (or southern) parts of Henan province. Differences in the distribution of Yp and Yrp caused the divergent patterns in the climatic suitability under these two conditions. The suitable zones under well-watered conditions were mainly located in the western and central parts, whereas the suitable zones under rainfed conditions were mainly located in the southern parts. Divergent patterns were detected in other parts, where climatic suitability under well-watered relative to rainfed conditions changed from suitable zones to near-suitable zones in western parts and from near-suitable to non-suitable zones in northern parts, indicating that irrigation could improve climatic suitability for summer peanut planting in these regions. A total of 56% of the peanut planting area was matched with the suitable zones under rainfed conditions based on the county-level peanut planting area from 2013 to 2017. Collectively, our work provides a novel framework for estimating crop planting suitability and can offer a refined benchmark for summer peanut planting layout.

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Data availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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The code is available from the corresponding author on reasonable request.

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Funding

This work was supported by the National Key Research and Development Program of China (No. 2019YFD1002204), the National Natural Science Foundation of China (No. 41901013), and the basic research fund of the Chinese Academy of Meteorological Sciences (2021Y026).

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SS and CYW conceived the project idea; SS and CYW designed the study; SS and MEZ performed the synthetic data analysis; YLS, FW, and YZ contributed to the result interpretation; SS drafted the manuscript; and all authors contributed to the final version.

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Correspondence to Chunyi Wang.

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Sun, S., Zhang, M., Wang, C. et al. An integrated evaluation of climatic suitability for summer peanut at county level by coupling drought-waterlogging risk with potential productivity: a case study in Henan province, China. Theor Appl Climatol 151, 1773–1786 (2023). https://doi.org/10.1007/s00704-022-04340-w

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