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Evaluating the Impact of Crop Layout Changes on N and P Nutrient Balance: A Case Study in the West Liaohe River Basin, China

Author

Listed:
  • Zijuan Zhao

    (Agricultural Information Institute of CAAS, Beijing 100081, China)

  • Beilei Fan

    (Agricultural Information Institute of CAAS, Beijing 100081, China)

  • Dong Liu

    (College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract

Regional crop layout has changed significantly due to climate, policy, and other factors, which has impacted farmland nutrient balance. Here, we evaluated the impact of crop layout changes on N and P nutrient balance in the West Liaohe River Basin from 2000–2015. The study area has long been in a N and P surplus state. The unit N surplus exhibited a downward trend and the unit P surplus showed an increasing trend. Significant correlations existed between planting areas and nutrient surplus. The N and P surplus layout was mainly concentrated in the West Liaohe River lower reaches basin. The planting area of wheat must be reduced and the areas of maize and soybean must be controlled to adjust the N and P balance and reduce the environmental pollution risk. Chemical fertilizer and seed inputs are the main sources of N input. Furthermore, combining farming and pastoral farming is conducive to improving N and P use efficiency. Manure can be absorbed by farmland, the ratio of organic and chemical fertilizers can be reasonably set, and chemical fertilizer application can be reduced.

Suggested Citation

  • Zijuan Zhao & Beilei Fan & Dong Liu, 2021. "Evaluating the Impact of Crop Layout Changes on N and P Nutrient Balance: A Case Study in the West Liaohe River Basin, China," Sustainability, MDPI, vol. 13(14), pages 1-21, July.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:14:p:7982-:d:595923
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    References listed on IDEAS

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    1. Jie Zhang & Yaojun Liu & Taihui Zheng & Xiaomin Zhao & Hongguang Liu & Yongfen Zhang, 2021. "Nutrient and Stoichiometric Characteristics of Aggregates in a Sloping Farmland Area under Different Tillage Practices," Sustainability, MDPI, vol. 13(2), pages 1-19, January.
    2. Díaz de Astarloa, D.A. & Pengue, W.A., 2018. "Nutrients Metabolism of Agricultural Production in Argentina: NPK Input and Output Flows from 1961 to 2015," Ecological Economics, Elsevier, vol. 147(C), pages 74-83.
    3. Chunxia Yang & Hua Zheng & Binbin Huang & Ruonan Li & Zhiyun Ouyang & Cong Li, 2018. "Crop Structure Changes Altered the Cropland Nitrogen Balance between 2005 and 2015 on the Sanjiang Plain, China," Sustainability, MDPI, vol. 10(11), pages 1-14, November.
    4. He, Wentian & Jiang, Rong & He, Ping & Yang, Jingyi & Zhou, Wei & Ma, Jinchuan & Liu, Yingxia, 2018. "Estimating soil nitrogen balance at regional scale in China’s croplands from 1984 to 2014," Agricultural Systems, Elsevier, vol. 167(C), pages 125-135.
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