数字农科院2.0

Peanut oil is more environmentally sustainable than rapeseed oil from a carbon and nitrogen footprint perspective in China

文献类型： 外文期刊

作者： Fen Ma;Mingbao He;Yingchun Li;Yanqun Wang;Zhengping Peng;Yinlong Xu;Bohan Zhao;Jingyu Zhang

作者机构：

关键词： Carbon footprint;Climate change;Edible vegetable oil;Life cycle assessment;Nitrogen footprint

期刊名称： PeerJ

ISSN： 2167-8359

年卷期： 2025 年 13 卷

页码：

收录情况： SCIE（2025版）

摘要： Peanut and rapeseed oil, prominent edible oils in China, significantly contribute to greenhouse gas and reactive nitrogen emissions. A comprehensive examination of their environmental footprints is foundational for developing green and low-carbon products. Using a cradle-to-factory gate life cycle assessment, we quantified the carbon footprint (CF) and nitrogen footprint (NF) associated with the oil production of peanut and rapeseed from 2004 to 2023 in China. The results showed that peanut oil has a lower environmental impact than rapeseed oil, with a CF of 3,312.2 kg CO2eq t−1 oil and NF of 28.5 kg reactive nitrogen (Nr) t−1 oil, respectively, compared to 3,722.4 kg CO2eq t−1 oil and 43.3 kg Nr t−1 oil for rapeseed oil. It corresponded to less than 11.0% in CF and 34.2% in NF of peanut oil than that of rapeseed oil. The cropping phase was the primary source of disparity between the two oil products, with peanut exhibiting consistently lower yield-based CF and NF than rapeseed. Fertilizer application, primarily nitrogen (N) and compound fertilizers, accounted for 63.7% (peanut) and 91.4% (rapeseed) of CF, meanwhile N runoff and ammonia (NH3) volatilization were dominant in NF. Moreover, regions such as Jiangxi (peanut) and Yunnan, Shaanxi, and Gansu (rapeseed) exhibited high CF and NF but low productivity, suggesting the need for cropping layout optimization. Our findings highlight the environmental advantages of peanut oil, and recommend improved fertilizer management in agricultural stage and cleaner oil processing production to promote low-carbon, sustainable edible oil production in China.

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