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为了解绿潮优势种——硬毛藻在温度、曝气和沉积物作用下的分解过程及三因素的效应大小,通过室内模拟研究了不同环境条件下硬毛藻早期分解过程中生物量、分解速率及藻体磷释放率的变化,分析了不同环境因子对藻体分解影响的效应大小.结果表明,高温(20~30℃)和添加沉积物均能促进硬毛藻的腐烂分解及藻体磷素释放,其中,30℃条件下含沉积物处理的最大分解速率可达12.13%·d-1,14 d后藻体磷释放率为90%以上.曝气一方面可通过扰动加速藻体生物量的损失和分解速率,另一方面提供了好氧环境,抑制了藻体生物分解和磷素释放,因而其影响效应较低.研究表明,高温和添加沉积物均可加速丝状硬毛藻的分解和藻体磷素释放,夏季应及时清除水体中滋生和衰亡的藻体.
In order to understand the decomposition process and the effect of three factors on the dominant species of the green tide, Trichophaea saccata, under the effects of temperature, aeration and sediment, the effects of temperature, aeration and sediment on the biomass, Decomposition rate and phosphorus release rate of phytoplankton were analyzed.The effects of different environmental factors on the decomposition of algal biomass were analyzed.The results showed that both high temperature (20 ~ 30 ℃) Phosphorus release, in which the maximum decomposition rate of sediment treatment up to 12.13% · d-1 at 30 ℃ was more than 90% after 14 days.The aeration can be accelerated by perturbation accelerating algae Body biomass loss and decomposition rate, on the other hand provide aerobic environment, inhibit the biodegradation of phytoplankton and phosphorus release, and thus its effect is low.Research shows that high temperature and adding sediment can accelerate the filamentous hard The decomposition of algae and the release of phytoplankton phosphorus, the summer should promptly remove algae blooming and decay in the body.