菹草收割对沂蒙湖磷组分及环境因子的影响  

Effects of Potamogeton crispus harvesting on phosphorus components and environmental factors in Yimeng lake

作　　者：张莉颖 王立志[1] 刘淑婷 夏晓彤 王茜[1] 安娟[1] 吴希媛[1] 宋红丽[1] 王芸 郁万妮 吴元芝[1] 王忠诚 ZHANG Liying;WANG Lizhi;LIU Shuting;XIA Xiaotong;WANG Xi;AN Juan;WU Xiyuan;SONG Hongli;WANG Yun;YU Wanni;WU Yuanzhi;WANG Zhongcheng(Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection,Linyi University,College of Resources and Environment,Linyi 276005,China;Tianbaoshan Forest Farm of Pingyi,Linyi 273306,China)

机构地区：[1]山东省水土保持与环境保育重点实验室,临沂大学资源环境学院,临沂276005 [2]山东平邑天宝山林场,临沂273306

出　　处：《生态科学》2024年第4期66-75,共10页Ecological Science

基　　金：山东省自然科学基金(ZR2021MD045);国家自然科学基金(32071630,41977067,41601283,41303061);大学生创新创业项目(202110452092)。

摘　　要：为研究菹草收割对水中磷组分的影响,对比分析2017—2019年三年期间沂蒙湖菹草收割区和生长区水体各形态磷含量及环境因子的动态变化,探讨收割对水体磷组分的影响,结果表明:对菹草收割能显著改善水质、降低水体磷含量,尤其在菹草衰亡期,菹草收割能显著的降低水体中各形态磷含量,其中溶解性有机磷(DOP)含量的降低最为显著。沉积物分析显示,菹草收割能有效降低沉积物总磷(TP)和有机磷的含量,对无机磷的影响相对较小。环境因子监测结果为,菹草收割对pH和溶解氧无显著影响,收割使得水温,碱性磷酸酶活性(APA)和叶绿素a(Chl a)含量略呈升高趋势。相关分析表明,收割区TP与DOP呈弱相关,收割处理降低了APA与各形态磷,DOP与Chl a之间的相关性。综上,沂蒙湖每年的4月底、5月初对菹草进行选择性的收割,不但可以发挥菹草净化水质的功能,而且避免菹草衰亡后对水体造成的污染。In order to study the impact of P.crispus harvesting on phosphorus components in water,this study compared and analyzed the dynamic changes of phosphorus content and environmental factors in P.crispus harvesting area and P.crispus growing area of Yimeng lake during the three-year period from 2017 to 2019,and discussed the impact of harvesting on phosphorus components in water.The results showed that P.crispus harvesting could significantly improve water quality and reduce phosphorus content in water,especially in the decomposition period of P.crispus.The harvest of P.crispus could significantly reduce the content of all forms of phosphorus in water,especially the content of dissolved organic phosphorus(DOP).Sediment analysis showed that P.crispus harvesting could effectively reduce the contents of total phosphorus(TP)and organic phosphorus in sediments,and had relatively little effect on inorganic phosphorus.The monitoring results of environmental factors showed that the harvesting of P.crispus had no significant effect on pH and dissolved oxygen,but the water temperature,alkaline phosphatase activity(APA)and chlorophyll a(Chl a)were increased slightly.Correlation analysis showed that there was a weak correlation between TP and DOP in harvesting area.Harvesting treatment reduced the correlation between APA and all forms of phosphorus,DOP and Chl a.In conclusion,the selective harvesting of P.crispus in Yimeng lake at the end of April and early May each year can not only play the function of P.crispus in purifying water quality,but also avoid the secondary pollution to the water body after the decline of P.crispus.

关 键 词：菹草 收割 磷形态 环境因子 

分 类 号：S9329[农业科学—渔业资源]