贵州省雷山县茶叶生产碳排放评价及减排潜力分析

Carbon Emission Evaluation and Reduction Potential Analysis of Tea Production in Leishan County,Guizhou Province

以雷山县典型茶产区茶农物质投入产出数据为基础,借助碳足迹评价方法,估算了茶叶生产的碳排放强度,并据此进行了低碳化发展潜力分析。结果表明,在雷山县郎德镇和望丰乡,农户经营模式下每667 m^(2)茶叶生产的碳排放总量(以CO_(2)排放当量计)为799.68 kg,其中化学氮肥制造和施用是最主要的碳排放贡献源;茶农采用化学氮肥减量或有机肥替代投入方案(情景Ⅰ和情景Ⅱ)后,每667 m^(2)茶叶生产的碳排放可分别降低395.45 kg和392.36 kg,具有49.45%和49.06%的碳减排潜力。因此,优化茶园施肥管理,加强茶农绿色生产管理知识宣传及茶树种植技术培训,推广使用控释氮肥及硝化抑制剂是促进茶叶生产实现低碳绿色可持续发展的重要措施。

Exploring the carbon emission and reduction potential of tea production was important for Guizhou province to promote the local tea industry's economic and ecological benefits.Based on the material input and output data of tea farmers in typical tea producing areas in Leishan County,the carbon emission intensity of tea production was estimated using the carbon footprint assessment method,and a scenario analysis of low-carbon development potential was conducted.The results show that under the farmer's tea production management model,the total carbon emission per 667 m^(2) tea gardens in Langde Town and Wangfeng Township of Leishan County(in terms of CO_(2) equivalent)was 799.68 kg,with the production and application of chemical nitrogen fertilizer being the most important contributor.If the farmers accepted the recommended fertilization optimization scheme(Scenario I and Scenario II),the carbon emissions per 667 m^(2) tea gardens could be reduced by 395.45 kg and 392.36 kg,respectively,and the carbon emission reduction potential could be 49.45%and 49.06%.Therefore,optimizing fertilization management in tea gardens,strengthening the training of green production management knowledge among tea farmers,and promoting the use of controlled nitrogen release fertilizers and nitrification inhibitors were important measures to promote low-carbon green sustainable development in tea production.