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2010年12月至2011年11月,利用涡度相关技术研究了我国亚热带(浙江)毛竹林生态系统的CO2通量,分析了毛竹林净生态系统交换量(NEE)、生态系统呼吸量(RE)和生态系统总交换量(GEE)的变化.结果表明:研究期间,毛竹林各月的NEE均为负值,7月最大,为-99.33 g C·m-2,11月最小,仅-23.49 g C·m-2,其变化曲线呈双峰型.各月CO2通量平均日变化差异明显,9月最大,为-0.60 g CO2·m-2·s-1,1月最小,为-0.30 g CO2·m-2·s-1,且在NEE正负转换的时间点上呈明显的季节变化特征;全年RE呈单峰型变化,夏季最高、冬季最低,夜间RE与土壤温度呈极显著正相关.全年NEE、RE和GEE分别为-668.40、932.55和-1600.95 g C·m-2·a-1,NEE占GEE的41.8%.与其他生态系统相比,毛竹林的固碳能力极强.
From December 2010 to November 2011, the CO2 flux of moso bamboo forest ecosystem in subtropical China (Zhejiang) was studied by using the eddy covariance technique. The net ecosystem exchange (NEE), ecosystem respiration (RE) ) And total ecosystem exchange (GEE) .Results showed that during the study period, the NEE of Moso bamboo forest was negative in all months, the highest in July was -99.33 g C m-2, the highest in November and only- 23.49 g C · m-2, the curve of which showed a bimodal pattern.The mean daily variation of CO2 flux was significantly different in each month, and the maximum in September was -0.60 g CO2 · m-2 · s-1, -0.30 g CO2 · m-2 · s-1, and showed obvious seasonal variation at the time of positive and negative NEE transformation. The annual RE showed a unimodal change with the highest in summer and the lowest in winter. The nighttime RE and soil temperature The annual NEE, RE and GEE were -668.40, 932.55 and -1600.95 g C · m-2 · a-1, respectively, and NEE accounted for 41.8% of the GEE. Compared with other ecosystems, Strong carbon sequestration.