【摘要】：通過室內(nèi)模擬,研究了不同環(huán)境條件下綠潮硬毛藻的分解速率,以及死亡藻體內(nèi)營(yíng)養(yǎng)鹽的釋放規(guī)律,以闡明硬毛藻大量衰亡對(duì)天鵝湖水質(zhì)的潛在影響。結(jié)果顯示,溫度對(duì)硬毛藻分解速率的影響顯著(P0.01),高溫(30℃)可促進(jìn)藻體的分解,而沉積物和營(yíng)養(yǎng)鹽水平對(duì)分解的影響相對(duì)較小。在試驗(yàn)前期(0~7 d),硬毛藻的分解速率較大,藻體中的P向水體大量釋放;而N的釋放量較低,并呈持續(xù)釋放的趨勢(shì)。P釋放率最高可達(dá)91.63%,而N僅為73.01%。溫度、沉積物對(duì)藻體N、P釋放的影響顯著(P0.01),各因子對(duì)藻體P釋放的影響效應(yīng)表現(xiàn)為:溫度沉積物營(yíng)養(yǎng)鹽水平;N釋放為:沉積物溫度營(yíng)養(yǎng)鹽水平。高溫條件下,死亡藻體的N、P釋放率均較高。因此,在溫度較高的夏末秋初,應(yīng)及時(shí)清理湖區(qū)中的死亡藻體,以免導(dǎo)致水質(zhì)惡化,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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