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• W654753609 abstract "通过实验模拟了10组氮、磷负荷对菹草(Potamogeton crispus)生长期和衰亡期茎叶附着物的影响.结果显示:随着水体氮、磷浓度的升高,菹草附着物的叶绿素a(Chl.a)含量、附着有机物量、附着无机物量和附着物总量均增加,在氮、磷浓度最高的T10组(总氮12.0 mg/L,总磷1.0 mg/L),附着物的总量达到高峰,附着物的Chl.a含量为2.005~4.765mg/g(DW),附着有机物的量为29.027~94.886 mg/g(DW),附着无机物的量为176.881~397.750 mg/g(DW),附着物总量为205.909~492.636 mg/g(DW).在菹草的快速生长期、稳定期和衰亡期,附着物的Chl.a含量、附着有机物量、附着无机物量和附着物总量均存在显著差异,均表现为衰亡期 >稳定期 >快速生长期,且在各营养盐浓度下均存在这一趋势.菹草衰亡期附着物的Chl.a含量、附着有机物量、附着无机物量和附着物总量分别为稳定期的1.046~1.826、1.046~1.638、1.029~1.858和1.106~1.717倍,为快速生长期的2.324~4.059、2.323~3.640、2.101~3.792和2.280~3.584倍.结果表明水体氮、磷负荷的增加促进了菹草茎叶附着物的生长和积累,加速了沉水植物衰亡.;To explore the role of periphyton in nutrient cycle in eutrophic shallow lake,the effect of the periphyton attached on Potamogeton crispus on nitrogen and phosphorus loads was examined in a mesocosm experiment conducted in controlled greenhouse.A gradient of ten nutrient concentrations (nitrogen concentrations from 3 to 12 mg/L and phosphorus concentrations from 0.1 to 1.0 mg/L) was established with NH₄Cl,NaNO₃,KH₂PO₄.The results showed that: The content of periphyton chlorophyll-a (Chl.a),organic matter,inorganic matter and total periphyton increased significantly with nitrogen and phosphorus loads increase.The content of periphyton Chl.a,organic matter,inorganic matter and total periphyton reached peak at T10 (TN 12 mg/L, TP 1.0 mg/L) with Chl.a 2.005-4.765 mg/g(DW) periphyton,organic matter 29.027-94.886 mg/g(DW) Potamogeton crispus, inorganic matter 176.881-397.750 mg/g(DW) Potamogeton crispus,and total periphyton 205.909-492.636 mg/g(DW) Potamogeton crispus,respectively.Periphyton Chl.a,organic matter,inorganic matter and total periphyton generally increased with time.Differences in periphyton Chl.a,organic matter,inorganic matter and total periphyton were significant among growth periods, and showed rapid growth period > stable period > decline period.Moreover,this trend occurred at all nutrient concentrations.The periphyton Chl.a,organic matter,inorganic matter and total periphyton of decline period were 1.046-1.826,1.046-1.638,1.029-1.858 and 1.106-1.717 times those of stable period,and were 2.324-4.059,2.323-3.640,2.101-3.792 and 2.280-3.584 times those of rapid growth period.The results above indicated that the periphyton of Potamogeton crispus and its decline were enhanced by elevated nitrogen and phosphorus loads." @default.
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• W654753609 date "2013-01-01" @default.
• W654753609 modified "2023-10-01" @default.
• W654753609 title "The impact of periphyton attached on <i>Potamogeton crispus</i> on nitrogen and phosphorus loads in water" @default.
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• W654753609 doi "https://doi.org/10.18307/2013.0308" @default.
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