生态环境学报2012，Vol.21Issue(6)：1096-1101,6.
苦草密度对扰动引起各形态磷释放的影响
Effects of Vallisneria natans density on phosphorus release by disturbance
摘要
Abstract
Vallisneria natans was cultured using eutrophic water sediment. V. natans density of 0, 20, 40, 100, 300, 450, 600 individuals·m-2 were built, a wind-wave disturbance with 24 hours disturbance and 126 hours undisturbed course were simulated. Phosphorus concentrations in water under different V. natans density were investigated in the disturbance and disturbed course. Turbidity and configuration of particle during the resuspension course were studied. The results indicated that phosphorus concentrations and turbidity increased rapidly at the beginning of the disturbance course when the density of V. natans was 0, 20,40 individuals·m-2, and reached the maxvalue after 10 hours disturbance then decreased. There was no significant difference of turbidity and different phosphorus concentrations between the disturbance and undisturbed course when the density of V. natans was greater than the density of 100 individuals·m-2. The total phosphorus quantity during the disturbance course decreased with exponential line with the density of V. natans increased. The middle grain size of different V. natans density water body reached the maximum after 3 hours disturbance, but the middle grain size decreased at the end of disturbance course and decreased to the minimum at 36 hours during the experiment. The mathematic simulated model indicated that all phosphorus concentrations have significant correlation with time and density of V. natans. The results of this experiment suggested that increasing V. natans density could resistant phosphorus release from sediment. There was no significant effect on phosphorus concentrations during the disturbance course when the density of V. natans was greater than the density of 100 individuals·m-2. The main reason of phosphorus concentrations decrease at the end of the disturbance course was the decrease of the particle size and the increase of the particle specific surface, which increased the absorb ability of phosphorus.关键词
沉水植物/苦草/扰动/磷Key words
submerged macrophyte/ Vallisneria natans/ disturbance/ phosphorus分类
资源环境引用本文复制引用
王立志,王国祥..苦草密度对扰动引起各形态磷释放的影响[J].生态环境学报,2012,21(6):1096-1101,6.基金项目
国家自然科学基金项目(40873057) （40873057）
国家自然科学基金项目(41101263) （41101263）
山东省科技攻关项目(2009GG10006015) （2009GG10006015）
临沂市重大科技创新项目(201011019) （201011019）
山东省中青年科学家科研奖励基金项目(2009BSA13006) （2009BSA13006）
