Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (6): 974-983.DOI: 10.3969/j.issn.1004-1524.2021.06.02

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Temporal and spatial characteristics of carbon footprint and water footprint in rice production in Jilin Province

ZHANG Huiyun(), QIN Lijie*(), JIA Li   

  1. School of Geographical Sciences, Northeast Normal University, Changchun 130024, China
  • Received:2020-11-05 Online:2021-06-25 Published:2021-06-25
  • Contact: QIN Lijie

Abstract:

Agricultural production has an important impact on global warming, water scarcity and environment pollution. Carbon footprint (CF) and water footprint (WF) are indicators for evaluating greenhouse gas (GHG) emissions and water consumption, respectively. Based on the life cycle assessment method, we calculated the CF and WF in rice production, and analyzed the temporal and spatial characteristics and composition of the CF and WF in Jilin Province. The results showed that the CF fluctuated from 2007 to 2017, with an annual average value of 0.74 kg·kg-1. Methane emission from rice fields was the main source of CF in rice production, accounting for 41.55%, followed by GHG emissions caused by fertilizer applications, accounting for 21.18%. From 2007 to 2017, the WF showed a fluctuating downward trend, with an annual average value of 147 L·kg-1, of which the water scarcity footprint (WSF) was 122 L·kg-1, accounting for about 83%, and the water degradation footprint (WDF) was 25 L·kg-1, accounting for about 17%. The spatial differences of rice WF and CF in Jilin Province were obvious. The areas with higher WF were found in the western and central regions of Jilin Province, while the areas with higher CF were found in the eastern and central eastern regions of Jilin Province. Correlation analysis showed that CF and WF were negatively correlated.

Key words: rice, carbon footprint, water footprint, spatio-temporal characteristics

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