氮形态对沉水植物氮磷去除效果及沉积微生物群落结构的影响  

Effects of Nitrogen Forms on Nitrogen and Phosphorus Removal Efficiency of Submerged Plants and Microbial Community Structure in Sediments

作　　者：程铁涵 周昕彦 曹玉成[1] 俞佳铭 CHENG Tie-han;ZHOU Xin-yan;CAO Yu-cheng;YU Jia-ming(College of EnvironmentR and Esources/Zhejiang A&F University,Hangzhou 311300,China)

机构地区：[1]浙江农林大学资源与环境学院,浙江杭州311300

出　　处：《山东农业大学学报（自然科学版）》2022年第4期560-567,共8页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：浙江省重大科技专项重点社会发展项目(2015C03007);浙江省重点研发计划项目(2019C03121);浙江省“三农六方”科技协作项目(CTZB-F170623LWZ-SNY1)。

摘　　要：本文探究了在不同氮形态下沉水植物的氮磷去除效果及沉积微生物群落结构。以15 d为周期,进行4个周期的采样,分析水体氮磷的去除效果及微生物群落变化特征。结果表明:(1)苦草,马来眼子菜,仿生水草均在NH_(4)^(+)-N:NO_(3)^(-)-N为2:0的处理中对于总氮的去除率最高,分别达到了85.6%,82.1%,91.3%。(2)3种沉水植物在不同处理中对于总磷的去除率相差不大,但是苦草和马来眼子菜对于总磷的去除效果远优于仿生水草。(3)不同氮形态配比会对沉积物中的微生物群落造成影响,不同处理组中沉积物的微生物OTU数目、多样性、及微生物种类都有差异,沉积物中的主要菌门如变形菌门、绿弯菌门、厚壁菌门等均在NH_(4)^(+)-N:NO_(3)^(-)-N为2:0的处理中丰度更高,且NH_(4)^(+)-N:NO_(3)^(-)-N为2:0的处理中的微生物群落生长更好。In this paper,we investigated the nitrogen and phosphorus removal effects of submerged plants and the structure of sediment microbial communities under different nitrogen forms.Four cycles of sampling were conducted with a 15-day cycle to analyze the nitrogen and phosphorus removal effects and microbial community change characteristics of the water column.The results show that(1)Vallisneria natans,Potamogeton wrightii Morong and bionic aquatic plants had the highest removal rates for total nitrogen in the NH_(4)^(+)-N:NO_(3)^(-)-N treatment of 2:0,reaching 85.6%,82.1%,and 91.3%,respectively.(2)The removal rates of total phosphorus by the three submerged plants in different treatments were not significantly different,but the removal of total phosphorus by V.natans and P.wrightii was much better than that by bionic aquatic plants.(3)The number of microbial OTUs,diversity,and microbial species in the sediment differed among treatment groups,The major phyla in the sediment such as Proteobacteria,Chloroflexi,and Firmicutes were all in higher abundance in the treatment with NH_(4)^(+)-N:NO_(3)^(-)-N of 2:0,and the microbial community grew better in the treatment with NH_(4)^(+)-N:NO_(3)^(-)-N of 2:0.

关 键 词：氮形态 氮磷去除 微生物群落 

分 类 号：S154.3[农业科学—土壤学]