农业环境科学学报2009，Vol.28Issue(11)：2385-2388,4.
营养元素对微囊藻毒素好氧生物降解的影响
Effects of Nutrient Elements on the Biodegradation of Microcystin Under Aerobic Conditions
摘要
Abstract
The aerobic biodegradation process of microcystin LR( MCLR) in the sediment-water system was investigated through a series of well-controlled microcosm experiments using sediments from Taihu Lake as inocula. The effects of the additions of nutrient elements(carbon, nitrogen and phosphorus) on the degradation process were assessed. The results showed that MCLR was degraded to below the detection limit at the 16th day with a lag period of 8 days, indicating that indigenous microorganisms in the sediment of Taihu Lake were capable of degrading microcystin under aerobic conditions. The addition of glucose or nitrogen (NH_4-N and NO_3-N) had no obvious effect on the biodegradation of MCLR( P≥0.05), whereas the addition of phosphorus could significantly promote the biodegradation of MCLR( P<0.01). These results suggest that phosphorus might be the limited nutrient for aerobic biodegradation of MCLR in natural sediment. These findings are helpful for evaluating the biodegradability of MC and predicting the tendency of MC pollution in eutrophic water bodies.关键词
微囊藻毒素/生物降解/营养元素Key words
microcystin/ biodegradation/ nutrient elements分类
资源环境引用本文复制引用
杨霞,陈晓国,钱辉跃,肖邦定..营养元素对微囊藻毒素好氧生物降解的影响[J].农业环境科学学报,2009,28(11):2385-2388,4.基金项目
国家自然科学基金项目(20607016) （20607016）
