摘要
利用2018年6月—2019年5月对松雅湖国家湿地公园5个样点水质的月监测数据,分析松雅湖湿地水质时空分布特征,并应用修正的卡尔森营养状态指数法(TSI)对该区域的水质富营养化现状进行评价。结果表明:(1)松雅湖湿地水溶解氧(DO)平均含量为8.93 mg/L,处于富氧状态,平均pH 8.2,基本呈弱碱性;(2)总氮(TN)、总磷(TP)的平均浓度分别为0.98、0.062 mg/L,TN的变化趋势与氨氮(NH3-N)基本一致,呈现出夏季高、冬季低的季节变化趋势,各采样点间叶绿素a(Chla)浓度相差较大;(3)5个采样点的水质富营养化状态各有差异,表现为富营养化程度由轻到重分别是:2#水治理B区<3#水治理C区<1#湿地出水口<4#礼乐广场<5#湖区中央香岛,2#样点表现为中营养,其余样点均为富营养;(4)水质富营养化状态的季节变化特征为:夏季>秋季>冬季>春季,四季综合营养状态指数差异不明显(P<0.05);(5)TSIM与DO、pH、TN均有显著正相关(P<0.01),与Chla呈显著负相关(P<0.05),与TP、NH3-N的相关性不显著。
Based on the monthly monitoring data of five samples of water quality in Songya Lake National Wetland Park from June 2018 to May 2019,the spatial and temporal distribution characteristics of water quality in Songya Lake Wetland were analyzed,and the eutrophication status of water quality in this area was evaluated by the modified Carlson trophic state index(TSI).The results showed that:(1)the average content of dissolved oxygen in Songya Lake Wetland was 8.93 mg/L,which was in the oxygen-rich state,and the average pH was 8.2,which was basically weakly alkaline;(2)the average concentration of total nitrogen and total phosphorus was 0.98 mg/L and 0.062 mg/L,respectively,the variation trend of total nitrogen was basically the same as that of ammonia nitrogen,presenting a seasonal variation trend of higher in summer and lower in winter,and there was a large difference in chlorophyll-a concentration among the sampling points;(3)there were differences of the eutrophication status of water quality in the five sampling sites of Songya Lake,the degree of eutrophication from light to heavy was:2#water management area B<3#water management area C<1#wetland water outlet<4#Reed Square<5#lake central island,sample 2#showed middle nutrition,while the rest were eutrophication;(4)the seasonal change characteristics of eutrophication status of wetland water quality in Songya Lake were:summer>autumn>winter>spring,and the difference of comprehensive nutritional status index in four seasons was not obvious(P<0.05);(5)the comprehensive nutritional status index of Songya Lake wetland was significantly and positively correlated with DO,p H and TP(P<0.01),and significantly and negatively correlated with Chla(P<0.05),but not with TP and NH3-N.
作者
李巧云
廖菊阳
胥雯
刘艳
廖鹏
吴林世
宋胤
王玲
张娟
黄雅奇
谭知虎
Li Qiaoyun;Liao Juyang;Xu Wen;Liu Yan;Liao Peng;Wu Linshi;Song Yin;Wang Ling;Zhang Juan;Huang Yaqi;Tan Zhihu(Hunan Botanical Garden,Changsha 410116;Hunan Changsha-zhuzhou-xiangtan City Cluster National Research Station of Forest Ecosystem,Changsha 410116)
出处
《中国农学通报》
2021年第25期85-91,共7页
Chinese Agricultural Science Bulletin
基金
中央财政林业科技推广示范资金项目“优良杜鹃新品种溪畔白霞及其在森林景观精准提升中的应用于示范”([2020]XT05)
湖南省林业科技创新专项“湖湘地区森林景观构建及其精准提升技术研究”(XLK201942)
林业科技创新资金项目“长株潭绿心区域森林生态系统定位监测及生态修复研究”(XLK20203-3)。
关键词
松雅湖
湿地公园
水环境特征
水质指标
营养状态
富营养化评价
Songya Lake
wetland park
water environmental characteristics
water quality indicators
nutritional status
evaluation of eutrophication
