数字农科院2.0

Large loss of reactive nitrogen and the associated environmental damages from tea production in China

文献类型： 外文期刊

作者： Huang, Xingcheng;Lakshmanan, Prakash;Zhang, Wushuai;Wang, Xiaozhong;Liu, Bin;Ni, Kang;Ruan, Jianyun;Shi, Xiaojun;Chen, Xinping;Zhang, Fusuo

作者机构：

关键词： tea plantation;reactive nitrogen;damage cost;mitigation potential;meta-analysis

期刊名称： AGRICULTURE ECOSYSTEMS & ENVIRONMENT

ISSN： 0167-8809

年卷期： 2025 年 377 卷

页码：

收录情况： SCIE（2025版）

摘要： Tea (Camellia sinensis L.), the most popular beverage worldwide and an important cash crop in China, plays a crucial role in the socio-economic landscape. Reactive nitrogen (Nr) loss from tea cultivation in China has become a major environmental problem due to the high input of N fertilizers. However, the scale of the Nr loss and its environmental impact on tea production in China remains unknown. Hence, we conducted a comprehensive meta-analysis of ammonia volatilization (NH3), nitrogen oxide (NOx), nitrous oxide (N2O) emissions, N leaching (total nitrogen, TN), and N runoff (TN) losses in tea plantations in China. The total Nr loss in Chinese tea plantations was 376 Gg yr(-1) (149 kg N ha(-1) yr(-1)) in 2014, with N leaching, NH3 volatilization, N2O emissions, NOx emissions, and N runoff losses accounting for 52.2 %, 33.2 %, 7.5 %, 5.4 %, and 1.7 %, respectively. The total Nr loss-related environmental damage cost of tea cultivation reached 9.53 billion CNY yr(-1) in 2014, which was 7.7 % of the total tea production output value. The bulk of the environmental damage cost was attributed to NH3 volatilization (49.1 %), N2O emissions (24.9 %), and N leaching (19.2 %). Large Nr losses occurred during tea production in Sichuan, Hubei, Guizhou, Yunnan, Zhejiang, and Hunan provinces, accounting for 17.7 %, 17.0 %, 13.4 %, 10.7 %, 7.6 %, and 7.0 % of the total Nr losses in China, respectively. Our analysis showed that the adoption of integrated nutrient management reduced N fertilizer inputs to 300 kg N ha(-1), lowered Nr loss from 376 Gg to 172 Gg yr(-1), and reduced the environmental damage cost of N loss by 45.4 %. These findings, along with detailed data on the N balance of tea cultivation, provides critical information needed to develop effective region-specific N nutrient management practices and policies for sustainable and profitable tea crop production in China, and possibly in other similar geographies.

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