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文章摘要

氮素对丹江口水库典型硅藻生长和光合特性的影响

Effects of Nitrogen on Growth and Photosynthetic Characteristics of Typical Diatoms in Danjiangkou Reservoir

DOI：

英文关键词: Diatoms Nitrogen Photosynthetic characteristics Fluorescence parameters DanjiangkouReservoir

基金项目:国家自然科学基金资助项目（U1704241）；中原科技创新领军人才基金资助项目（194200510010）

作者	单位
马甜莹	河南理工大学资源环境学院
刘晓真	河南理工大学资源环境学院
李园园	河南理工大学资源环境学院
刘东升	河南理工大学资源环境学院
李卫国	河南理工大学资源环境学院

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中文摘要:

以丹江口水库典型优势硅藻脆杆藻（Fragilaria sp.）、肘状针杆藻（Synedra ulna）和梅尼小环藻（Cyclotella meneghiniana）为研究对象，分别以硝酸钠（硝氮）、氯化铵（氨氮）为氮源，通过实验考察不同氮素条件下3种硅藻的生长特性和叶绿素荧光参数。结果表明，氮素可通过改变硅藻的光合作用效率影响其生长与繁殖，相比氨氮，硝氮作为氮源更能满足3种硅藻的生长需求。当硝氮为10mg/L时，3种硅藻生长良好，藻细胞密度分别达到最大值13613×104 cells/mL、8288×104 cells/mL和15940×104 cells/mL。通过测定叶绿素荧光参数，可监控丹江口水库水质富营养化情况。

英文摘要:

Taking typical dominant diatoms of Fragilaria sp.， Synedra ulna and Cyclotella meneghiniana in Danjiangkou Reservoir as the research objects， using sodium nitrate（nitrate nitrogen） and ammonium chloride（ammonia nitrogen） as nitrogen sources， the growth characteristics and chlorophyll fluorescence parameters of the three type of diatoms under different nitrogen conditions were investigated. The results showed that nitrogen could affect the growth and reproduction of diatoms by changing their photosynthetic efficiency. Compared with ammonia nitrogen， nitrate nitrogen could better meet the growth needs of the three types of diatoms. When nitrate nitrogen was 10 mg/L， the three types of diatoms grew well with maximum cell densities of 136.13×104 cells/mL， 82.88×104 cells/mL and 159.40×104 cells/mL， respectively. By measuring chlorophyll fluorescence parameters， the eutrophication of water quality in Danjiangkou Reservoir could be monitored.

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