湖泊科学2013，Vol.25Issue(2)：289-294,6.
光照和黑暗条件下苦草(Vallisneria natans)和穗花狐尾藻(Myriophyllum spicatum)对铵态氮的吸收
Uptake of ammonium by Vallisneria natans and Myriophyllum spicatum under light and dark regimes
摘要
Abstract
The uptakes and removal effects of ammonium nitrogen (NH4+ -N) by Vallisneria natans and Myriophyllum spicatum under light (50 μmol/( m2 · s)) and dark regimes were investigated in a laboratory experiment, with external NH4+ -N concentrations at 0,0.01, 0.1,1 and 10 mg/L. The results showed that the absorption rates of NH4+ -N by V. natans and M. spicatum, increased with external NH4+ -N concentrations and peaked at 1 mg/L, and then decreased at 10 mg/L. The absorption rates of NH4+ -N by the same plant species in the light condition was not less than those in the dark condition. The absorption rate of NH4+ -N by M. spicatum was not less than that by V. natans in the same light regime. Under dark regimes, with external NH4+ -N concentrations at 1 mg/L, the absorption rates of NH4+ -N by M. spicatum was 2.42-fold higher than that of V. natans. Under light regimes, with external NH4+ -N concentrations at 1 and 10 mg/L, the absorption rates of NH4+ -N by M, spicatum was 2.47-fold and 1. 79-fold higher than that of V. natans, respectively. Therefore, at a certain range of NH4+ -N concentrations that macrophytes can tolerate, M. spicatum should be considered as the pioneer species for the restoration of macrophytes in eutrophic lakes.关键词
苦草/穗花狐尾藻/光强/铵态氮/吸收速率Key words
Vallisneria natans/ Myriophyllum spicatum/ light regimes/ ammonium nitrogen/ uptake rate引用本文复制引用
钟爱文,曹特,张萌,倪乐意,谢平..光照和黑暗条件下苦草(Vallisneria natans)和穗花狐尾藻(Myriophyllum spicatum)对铵态氮的吸收[J].湖泊科学,2013,25(2):289-294,6.基金项目
国家水体污染控制与治理科技重大专项项目(2012ZX07105-004)资助 （2012ZX07105-004）
