Integrated Carbon Footprint and Economic Performance of Five Types of Dominant Cropping Systems in China’s Semiarid Zone

Danqi Luo, Gang Xu, Jiao Luo, Xia Cui, Shengping Shang and Haiyan Qian
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Danqi Luo: State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou 730020, China
Gang Xu: State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou 730020, China
Jiao Luo: State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou 730020, China
Xia Cui: College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730020, China
Shengping Shang: State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou 730020, China
Haiyan Qian: State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou 730020, China

Sustainability, 2022, vol. 14, issue 10, 1-17

Abstract: Crop production requires large areas of land and makes an important contribution to greenhouse gas emissions. Cleaner production of all crop types could be of great significance to realizing carbon neutrality as soon as possible. The present study adopted life cycle assessment (LCA) combined with the profit accounting method of input-output to compare the differences in greenhouse gas emissions in the entire life cycle of apple ( Malus pumila Mill.), grain maize ( Zea mays L.), wheat ( Triticum aestivum L.), silage maize ( Zea mays L.), and alfalfa ( Medicago sativa Linn.) production in eastern Gansu Province with three functional units, including per ha of land, per ton of product, and per 10,000 yuan of output value. The results showed that apple had the largest carbon footprint per ha. Wheat had the largest carbon footprint per ton of product and per 10,000 yuan output. The results of LCA inventory sensitivity analysis showed that the main sources of greenhouse gas emissions for all crops were the production process of agricultural materials such as chemical fertilizer, machinery, and agricultural film. In particular, the excessive input of chemical fertilizer was the driving factor resulting in greenhouse gas emissions. Based on the study results, this paper also puts forward certain suggestions on the future land use of the cropping systems in the study area.

Keywords: carbon footprint; greenhouse gas emissions; profit; life cycle assessment; land use (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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