Journal of Ecology and Rural Environment ›› 2019, Vol. 35 ›› Issue (10): 1242-1251.doi: 10.19741/j.issn.1673-4831.2019.0192

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The Estimation and Analysis of Spatio-Temporal Change Patterns of Carbon Functions in Major Grain Producing Area

DU Jiang1, LUO Jun2, WANG Rui1, WANG Xin-hua1   

  1. 1. Department of Economics and Management, Wuhan Polytechnic University, Wuhan 430023, China;
    2. School of Marxism, Wuhan Vocational College of Software and Engineering, Wuhan 430205, China
  • Received:2019-03-27 Online:2019-10-25 Published:2019-10-23

Abstract: This paper focuses on the research of eight types of farm crops and the emission of CO2, CH4 and N2O based on the concept of life cycle and the theory of carbon footprint. The carbon footprint of crops production was estimated by applying the provincial input-output data in the main grain-producing area during 1991-2016. The conclusions are shown as follows:the amount of carbon emissions in main production areas increases by 38.08%. The emission sources sorted by proportions in descending order are rice cultivation (36.76%), agricultural inputs (33.42%), straw burning (17.94%) and nitrogen application (11.88%). The amount of carbon sink increased by 54.28%. The carbon sink amount of most of crops increased annually except for tubers and cotton. Especially, the carbon sink amount of rice, wheat and corn are much larger than other crops. The provinces characterized by rice carbon sink includes Jiangxi, Hunan, Hubei, Jiangsu, Sichuan and Anhui. The provinces characterized by wheat carbon sink includes Henan and Shandong. The provinces characterized by corn carbon sink includes Heilongjiang, Liaoning, Jilin, Neimenggu and Hebei. The carbon footprint of crops is featured by "inverted-U-shape", that is,it increased first and then decreased. The footprint increased by 12.17% from 1991 to 2016. The results of the research provided references for the directions and ways of reducing the agricultural carbon emissions.

Key words: greenhouse gas, crop farming, agricultural carbon emission, life cycle analysis, carbon footprint

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