绿潮硬毛藻衰亡分解过程中营养盐的释放规律

发布时间：2019-05-12 00:58

【摘要】：通过室内模拟,研究了不同环境条件下绿潮硬毛藻的分解速率,以及死亡藻体内营养盐的释放规律,以阐明硬毛藻大量衰亡对天鹅湖水质的潜在影响。结果显示,温度对硬毛藻分解速率的影响显著(P0.01),高温(30℃)可促进藻体的分解,而沉积物和营养盐水平对分解的影响相对较小。在试验前期(0~7 d),硬毛藻的分解速率较大,藻体中的P向水体大量释放;而N的释放量较低,并呈持续释放的趋势。P释放率最高可达91.63%,而N仅为73.01%。温度、沉积物对藻体N、P释放的影响显著(P0.01),各因子对藻体P释放的影响效应表现为:温度沉积物营养盐水平;N释放为:沉积物温度营养盐水平。高温条件下,死亡藻体的N、P释放率均较高。因此,在温度较高的夏末秋初,应及时清理湖区中的死亡藻体,以免导致水质恶化,造成二次污染。
[Abstract]:Through laboratory simulation, the decomposition rate of Chlorella vulgaris and the release of nutrients in dead algae under different environmental conditions were studied in order to elucidate the potential effect of large number of decayed algae on the water quality of Swan Lake. The results showed that temperature had a significant effect on the decomposition rate of Chlorella vulgaris (P01). High temperature (30 鈩，

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