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Estimation of Corn Net Primary Productivity and Carbon Sequestration Based on the CASA Model: A Case Study of the Fen River Basin

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  • Zhiqiang Zhang

    (School of Environment and Resources, Taiyuan University of Science and Technology, Taiyuan 030024, China)

  • Lijuan Huo

    (School of Environment and Resources, Taiyuan University of Science and Technology, Taiyuan 030024, China)

  • Yuxin Su

    (School of Environment and Resources, Taiyuan University of Science and Technology, Taiyuan 030024, China)

  • He Shen

    (School of Geography and Tourism, Shaanxi Normal University, Xi’an 710062, China)

  • Gaiqiang Yang

    (School of Environment and Resources, Taiyuan University of Science and Technology, Taiyuan 030024, China
    Agricultural Hydropower Department, Department of Water Resources of Shanxi Province, Taiyuan 030002, China)

Abstract

The utilization of remote sensing technology to assess changes in crop net primary productivity (NPP), biomass, and carbon sequestration within the Fen River Basin, a crucial agricultural region in China, is important for achieving agricultural modernization, enhancing ecological environment quality, and obtaining carbon neutrality objectives. This study employed satellite remote sensing and the Carnegie–Ames–Stanford approach (CASA) model as research methods to investigate the temporal and spatial distribution characteristics of corn NPP in the Fen River Basin. Correlation analysis was conducted to examine the response of corn NPP to various environmental factors in the region, while aboveground biomass and carbon sequestration of corn were estimated using a biomass inversion model driven by NPP and principles of photosynthesis in green plants. The findings revealed that, from a temporal perspective, corn NPP in the Fen River Basin exhibited a unimodal variation pattern, with an average value of 368.65 gC/m 2 . Spatially, the corn NPP displayed a discernible differentiation pattern, with the highest values primarily observed in the middle reaches of the Fen River Basin. Throughout the spatial and temporal variations in corn NPP during 2011–2020, the carbon sequestration capacity of corn exhibited an upward trend, particularly since 2017. The corn NPP displayed a positive correlation with temperature and precipitation. The response to solar radiation was mildly negative and a mildly positive correlation. In 2020, the aboveground biomass and carbon sequestration of corn followed a normal distribution, with the highest values concentrated in the northwestern part of the lower Fen River.

Suggested Citation

  • Zhiqiang Zhang & Lijuan Huo & Yuxin Su & He Shen & Gaiqiang Yang, 2024. "Estimation of Corn Net Primary Productivity and Carbon Sequestration Based on the CASA Model: A Case Study of the Fen River Basin," Sustainability, MDPI, vol. 16(7), pages 1-18, April.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:7:p:2942-:d:1368662
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