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当前位置: 首页 > 文章 > 二氧化碳浓度升高对太湖沉水植物马来眼子菜生长的影响 应用生态学报 2009,20 (6) 1299-1304
Position: Home > Articles > Effects of elevated CO_2 concentration on the growth of submerged macrophyte Potamogeton malaianus in Taihu Lake Chinese Journal of Applied Ecology 2009,20 (6) 1299-1304

二氧化碳浓度升高对太湖沉水植物马来眼子菜生长的影响

作  者：
邓建才;翟水晶;陈桥
单  位：
中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室
关键词：
CO2浓度升高;马来眼子菜;生物量;C;N;P;可溶性糖
摘  要：
通过室外培养试验,研究不同CO2浓度条件下沉水植物马来眼子菜的生长及生理变化.结果表明:CO2浓度升高(1000μmol·mol-1)条件下,马来眼子菜单株的平均生物量增加了44.3%(P<0.01),茎生物量比重下降了5.5%(P<0.05);根和叶中氮含量分别下降了18.1%和6.4%(P<0.05),而茎中氮含量变化不明显(P>0.05);根、茎、叶中磷含量分别增加了22.2%(P<0.05)、26.6%(P>0.05)和38.8%(P<0.05);可溶性糖含量增加了27.3%、18.3%和37.5%(P<0.05);根、茎和叶中全碳含量增加了4.6%、5.3%和2.0%;CO2浓度升高使水体中氮、磷含量分别下降了7.9%和5.1%(P<0.05),但对底泥中氮、磷的含量影响不明显.CO2浓度升高将对沉水植物生长及其生境有一定影响.
译  名：
Effects of elevated CO_2 concentration on the growth of submerged macrophyte Potamogeton malaianus in Taihu Lake
作  者：
DENG Jian-cai1, ZHAI Shui-jing1,2, CHEN Qiao1,2 (1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China).
关键词：
elevated CO2 concentration; Potamogeton malaianus; biomass; C; N; P; soluble sugar
摘  要：
An outdoor culture experiment was conducted to study the growth and nutrient contents of submerged macrophyte Potamogeton malaianus in Taihu Lake under different CO2 concentrations. As affected by elevated CO2 concentration (1000 μmol·mol-1), the biomass per plant increased by 44.3% (P<0.01), but the shoot biomass decreased by 5.5% (P<0.05). The N content in root and leaf decreased by 18.1% (P<0.05) and 6.4% (P<0.05), respectively, but that in stem was less affected (P>0.05). The P content in root, shoot, and leaf increased by 22.2% (P<0.05), 26.6% (P>0.05) and 38.8% (P<0.05), soluble sugar content increased by 27.3%, 18.3% and 37.5% (P<0.05), and total C content increased by 4.6%, 5.3% and 2.0%, respectively. Elevated CO2 concentration decreased the N and P concentrations in water body by 7.9% and 5.1% (P<0.05), respectively, but had less effects on the N and P contents in sediment. It was suggested that elevated CO2 concentration had definite effects on the growth and habitat of submerged macrophytes.

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