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Roles of nitrogen, phosphorus, and potassium fertilizers in carbon sequestration in a Chinese agricultural ecosystem

Author

Listed:
  • Hong Zhao

    (Jinan Environmental Research Institute)

  • Binfeng Sun

    (Jiangxi Academy of Agricultural Sciences)

  • Fei Lu

    (Chinese Academy of Sciences
    Joint Center for Global Change Studies (JCGCS))

  • Xiaoke Wang

    (Chinese Academy of Sciences)

  • Tao Zhuang

    (Jinan Environmental Research Institute)

  • Guo Zhang

    (Chinese Academy of Sciences)

  • Zhiyun Ouyang

    (Chinese Academy of Sciences)

Abstract

Previously, most carbon (C) sequestration research focused on the effects of nitrogen (N) fertilization on soil organic C sequestration rather than on the separate effects of synthetic phosphorus (P) and potassium (K) and the integrated effect of NPK. In this study, a meta-analysis was conducted to synthesize 84 long-term trials with 385 paired comparisons to quantify the variance of soil C storage in response to synthetic fertilizer addition. Compared with unfertilized soil, higher C storage was observed in soils fertilized with NPK, N, P, and K (10, 5, 5, and 2%, respectively) at a depth of 0–20 cm, and changes in soil C storage were dependent on the cropping system, experimental duration, geographic region, and fertilization rate. Soils fertilized with NPK and N in wheat (Triticum aestivum) and maize (Zea mays) cropping systems in the northern region of China had greater soil C storage. The greatest increase in C storage occurred in soils fertilized with P in rice (Oryza sativa) and wheat cropping systems. Additionally, the ratio of N/P added as fertilizer was negatively related to soil C storage. When N, P, and K were applied together, N and P fertilizers explained 49 and 11% of the variability in soil C storage, while the contribution of K was unclear. This study reveals the important roles of P and N fertilizers in soil C sequestration. We estimated that fertilizer use resulted in the sequestration of 947.2–1093 Tg C in China’s croplands from 1980 to 2014.

Suggested Citation

  • Hong Zhao & Binfeng Sun & Fei Lu & Xiaoke Wang & Tao Zhuang & Guo Zhang & Zhiyun Ouyang, 2017. "Roles of nitrogen, phosphorus, and potassium fertilizers in carbon sequestration in a Chinese agricultural ecosystem," Climatic Change, Springer, vol. 142(3), pages 587-596, June.
    • Handle: RePEc:spr:climat:v:142:y:2017:i:3:d:10.1007_s10584-017-1976-2
    DOI: 10.1007/s10584-017-1976-2
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    Cited by:

    1. Wu, Yinyin & Wang, Ping & Liu, Xin & Chen, Jiandong & Song, Malin, 2020. "Analysis of regional carbon allocation and carbon trading based on net primary productivity in China," China Economic Review, Elsevier, vol. 60(C).

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