广西植物Issue(6)：799-805,7.DOI:10.3969/j.issn.1000-3142.2014.06.012
念珠藻对岩溶水中 Ca2＋、HCO－3利用效率实验研究
Experimental study on utilization efficiency of Ca2+ and HCO-3 in karst water by Nostoc
摘要
Abstract
During the karst carbon sink process,the dissolution of limestone brings CO2 which came from atmosphere and soil to water to form HCO-3 ,it stimulates the growth of aquatic algae.In order to study the stability of karst car-bon sink in the process of transforming inorganic carbon into organic carbon in aquatic algal photosynthesis.Nostoc which were screened in karst areas are used as the study object,probes into utilization of Ca2+ and HCO-3 in typical karst water by algal photosynthesis in closed system,and the relationship between algal cell biomass change and the utilization of Ca2+ and HCO-3 and as with the changes of pH and DO.The results showed that in the closed system 27.38% Ca2+ was absorbed by Nostoc cells through photosynthesis,and 29.54% Ca2+ was precipitated through phys-ical and chemical effects in the form of “Algae-CaCO3 ”complex and returned to the inorganic environment.In the process of algal photosynthesis,free CO2 was used first,then HCO-3 in karst water was used as carbon source in the closed system,and as with the using of HCO-3 ,the pH and DO correspondingly went up.At last in the closed system 65% HCO-3 in karst water was used by Nostoc through its photosynthesis,and 18.46% of which were precipitated together with Ca2+ in the form of extracellular CaCO3 ,81.54% are transformed into steady organic matter by algae through its photosynthesis and then cycle in ecological system which shows net carbon sink effect.关键词
念珠藻/光合作用/Ca2 +/CaCO 3 沉积/HCO -3/净碳汇效应Key words
Nostoc/photosynthesis/Ca2+/CaCO3 precipitation/HCO-3/net carbon sink effect分类
天文与地球科学引用本文复制引用
王培,胡清菁,曹建华,李亮..念珠藻对岩溶水中 Ca2＋、HCO－3利用效率实验研究[J].广西植物,2014,(6):799-805,7.基金项目
中国地质调查局工作项目(1212011087120,12120113005300) （1212011087120,12120113005300）
岩溶动力学重点实验室基金(14-B-04) （14-B-04）
