缓冲带径流污染物净化效果研究及其与草皮生物量的相关性  

Pollutant removal efficiency of sward buffers to runoff and the correlation with biomass

作　　者：吴建强[1] 黄沈发[1] 吴健[1] 熊丽君[1] 

机构地区：[1]上海市环境科学研究院,上海200233

出　　处：《湖泊科学》2008年第6期761-765,共5页Journal of Lake Sciences

基　　金：上海市科学技术委员会科研计划项目(04DZ12032)资助

摘　　要：利用自行设计的实验装置和5种土著草皮构建草皮缓冲带,模拟上海地区农业面源污染和降雨特征,进行缓冲带污染物净化效果和草皮生物量监测实验研究.结果表明,草皮缓冲带对径流污染物质的净化效果明显高于空白对照,百慕大实验带SS平均截留率最高,达到74%;白花三叶草TN、TP去除率最高,分别为28%和25%;黑麦草受高温的影响,污染物净化效果最差.5种草皮中,百慕大和白花三叶草生物量最大,栽种当年9月份,两者地上部分的生物量鲜重分别为6.14kg/m2和6.49kg/m2;百慕大生长速度最快,9月份生物量几乎达到5月份的6倍;草皮生物量的增加明显提高了缓冲带对径流污染物的去除效果,生物量与径流SS去除率呈显著线性相关关系.To examine the pollutant removal efficiency of different sward buffers to runoff and the correlation with biomass, 5 native grasses were selected to construct buffer strips and conduct an experiment under the simulation of agricultural non-point pollution and rainfall characteristics in Shanghai. The results showed： 1） the clarification efficiency to runoffof sward buffers was significantly better than the blank control, the SS average retention rate of Cynodon dactylon buffer strip was the highest, up to 74%; 2） the TN and TP average removal rate of Trifolium repens buffer strip was the highest, up to 28% and 25%; 3） the clarification efficiency of Lolium perenne buffer was the lowest because of the high temperature; 4） the aboveground biomass of C. dactylon was 6.14kg/m^2, and T repens was 6.49kg/m^2, higher than the other species; 5） the growth rate of C. dactylon was the fastest, whose biomass in September was almost as six times higher as in May; 6） the clarification efficiency of the sward was increased with higher biomass, there was a significant linear correlation between sward biomass and SS removal efficiency.

关 键 词：缓冲带 净化效果 草皮 生物量 相关性 

分 类 号：X52[环境科学与工程—环境工程]