湖泊科学2011，Vol.23Issue(4)：591-596,6.
三峡水库小江回水区春季初级生产力
Spring primary productivity in Xiaojiang River backwater area in the Three Gorges Reservoir
摘要
Abstract
During April and May in 2010, the primary production in the Xiaojiang River backwater area, Three Gorges Reservoir was measured using the black-white-bottle method. The distribution features and relationships with light intensity, chlorophyll-a concentration(Chl. A) , water temperature and partial pressure of carbon dioxide(pCO2 ) were studied. The results showed that the gross primary productivities(GPP) were 1927.5 mg O2/( m2 ? D) and 1325.0 mg O2/( m2 ? D) in April and May, respectively, the average value was 1626.3 mg O2/(m2 ? D). The gross respirations(GR) in the two months were 1037.5 mg O2/( m2 ? D) and 1062.5 mg O2/m2 ? D, respectively, and the average value was 1050.0 mg O2/(m2 ? D). The gross net productivities (GNP) in the two months were 890.0 mg O2/( m2 ? D) and 262.5 mg O2/(m2 ? D) , and the average value was 576.3 mg O2/ ( m2 ? D). Ratio of GPP/GR were 1.86 and 1.25. These indexes suggested that the Xiaojiang River was autotrophic in the spring season. Primary productivity(P) in each depth and the ratio of productivity to respiration(P/R) had similar vertical distribution feature, showing that the maximum values occurred near the surface and they decreased with depth. Correlation analysis showed that light intensity(I) and Chl. A were significantly positive correlation with the P. Equations of the linear regression model P with Chl. A and with /were respectively: P =0.154 Chi. A -0.278, with coefficient R2 =0.570, and P =0.001 /-0.013, with coefficient R2 =0.942.关键词
三峡水库/小江/浮游植物/初级生产力Key words
Three Gorges Reservoir/ Xiaojiang River/ phytoplankton/ primary productivity引用本文复制引用
郭劲松,李伟,李哲,孙志禹,陈永柏,龙曼,陈杰..三峡水库小江回水区春季初级生产力[J].湖泊科学,2011,23(4):591-596,6.基金项目
国家自然科学基金项目(51009155)、国家“973”计划项目(2010CB955904-02)、中国长江三峡集团公司项目(CT-09-08-03)和中央高校基本科研业务费科研专项“研究生科技创新基金”(CDJXS10211153)联合资助 （51009155）
