摘要
在冬季利用不同刈割处理的水芹浮床做连续两个周期的水质净化试验研究。结果表明:浮床系统能够维持水体为偏弱酸性环境;总磷的去除率在58%以上,前4天去除量占总磷去除量的80%以上,到第8天时,总磷浓度基本达到稳定,到2个周期试验结束,总磷浓度分别为0.366和0.215mg·L-1;铵态氮的去除率在90%以上,前4天的去除量占总去除量的70%以上,2个周期试验结束时,铵态氮浓度分别为0.455和0.522mg·L-1;硝态氮由于初始浓度不同,去除率差异比较大,2个周期试验结束时,硝态氮浓度分别为0.262和0.289mg·L-1;与空白对照相比,浮床系统能够在较短的时间内快速去除富营养化物质,但到试验结束时浮床与空白对照在营养元素去除方面几乎没有差异;不同刈割处理的水芹浮床在水体净化效果方面没有显著差异,在实际应用中可以不考虑刈割处理的影响。
Oenanthe javanica（Blume） DC floating beds with different cutting heights were employed to examine their purification effects on water quality in winter in two successive experimental periods.The floating bed systems could keep water body weakly acidic.The removal rate of total phosphorus by the floating bed systems was higher than 50%,and 80% of total phosphorous was removed within the first 4 days.At last,the total phosphorus concentration was 0.366 mg·L-1 and 0.215 mg·L-1 in two experimental periods,respectively.The removal rate of ammonium nitrogen was above 90%,with 70% removed within the first 4 days.At last,the ammonium nitrogen concentration was 0.455 mg·L-1 and 0.522 mg·L-1 in two experimental periods,respectively.The removal rate of nitrate nitrogen was dependent on its initial concentration,the final concentration of nitrate nitrogen was 0.262 mg·L-1 and 0.289 mg·L-1 in two experimental periods,respectively.The bed systems could rapidly remove nutrients in a shorter period,but less difference was observed between the floating bed systems and the control by the end of each experiment stage.There were no significant differences in the nutrients removal among the O.javanica floading beds with different cutting heights.
出处
《生态学杂志》
CAS
CSCD
北大核心
2011年第12期2745-2752,共8页
Chinese Journal of Ecology
基金
华东师范大学河口海岸学国家重点实验室科研业务经费(2010RCDW08
2008KYYW07)资助
关键词
生态浮床
水芹
留茬高度
差异性分析
ecological floating bed
Oenanthe javanica
stubble height
variation analysis.
