论文部分内容阅读
本文基于静态箱/红外气体分析法,分析太湖流域西部丘陵区不同植茶年龄(3、9和20 a)茶园生态系统碳通量特征。结果表明:茶园生态系统碳通量日变化和季节变化均呈单峰型,最大碳通量达-1.10 mg·m-2·s-1,晴天为碳吸收,阴天以碳排放为主;采茶使3—4月茶园生态系统碳通量降低,对9、20 a茶园影响较大,修剪使5—9月3、9 a茶园碳通量趋于一致,固碳能力大幅下降;茶园生态系统是显著的大气碳汇,年净生态系统碳交换量为-304.04 g C·m-2,固碳能力与林地相当,其开发利用不会造成生态系统碳汇减少。
Based on the static box / infrared gas analysis method, this paper analyzed the carbon flux characteristics of tea plantation ecosystems with different tea planting ages (3, 9 and 20 a) in the western hilly region of Taihu Lake region. The results showed that the diurnal and seasonal variations of carbon flux in tea plantation ecosystem showed a single peak with the maximum carbon flux of -1.10 mg · m-2 · s-1, carbon uptake on sunny days and carbon emission on cloudy days. Tea picking reduced the carbon flux in tea plantation ecosystems from March to April, which had a significant impact on 9,20 a tea plantations. Trimming had the same carbon flux in the tea plantations from March to September in May-September, and the carbon sequestration capacity dropped significantly. Ecosystem is a significant atmospheric carbon sink with annual net carbon exchange of -304.04 g C · m-2. Its carbon sequestration capacity is comparable to that of forested land. Its development and utilization will not result in a decrease of carbon sinks in ecosystems.