中国生态农业学报2012，Vol.20Issue(8)：1066-1071,6.DOI:10.3724/SP.J.1011.2012.01066
水生植物刈割对生态沟渠中氮、磷拦截的影响
Effects of cutting aquatic plants on nitrogen and phosphorus interception in ecological ditches
摘要
Abstract
In this study, Canna glauca, Hydrocotyle vulgaris, Sparganium stoloniferum, Myriophyllum spicatum and Juncus effusus aquatic plants were planted in an ecological ditch. The effects of plant cutting management on nitrogen (N) and phosphorus (P) interception in ecological ditches were then analyzed by N and P content comparisons and removal rates in water samples. The results showed that the amounts of total N and P removed by cutting aquatic plants in September and November were 11.889 kg and 1.099 kg, respectively, in the 300 m2 ecological ditch. Total N uptake by different aquatic plants was in the order of C. glauca (7.686 kg) > M spicatum (1.501 kg) > H. vulgaris (1.128 kg) >J. effusus (0.974 kg) > S. stoloniferum (0.601 kg). The order for total P was C. glauca (0.433 kg) > M. spicatum (0.233 kg) > S. stoloniferum (0.191 kg) > H. vulgaris (0.134 kg) > J. effusus (0.109 kg). Cutting plants also improved N and P removal efficiency in ditch sediments, except for S. stoloniferum. Compared to non-cutting areas, cutting areas showed increased sediment total N nutrient removal rates with M. spicatum (20.73%) > H. vulgaris (20.00%) > J. effusus (16.05%) > C. glauca (4.86%) > S. stoloniferum (-9.72%). That for total P was J. effusus (20.69%) > H. vulgaris (16.67%) > C. glauca (4.55%) > M. spicatum (0.00%) > 5. stoloniferum (-16.00%). N and P removal rates in water also increased under cutting treatment. Thus cutting aquatic plants not only removed nutrients from ditch systems, but also increased N and P interception in water and ditch sediments.关键词
生态沟渠/刈割/氮磷拦截/去除效率Key words
Ecological ditch, Cutting plant, Nitrogen/phosphorus interception, Removal efficiency分类
环境科学引用本文复制引用
张树楠,肖润林,余红兵,刘锋..水生植物刈割对生态沟渠中氮、磷拦截的影响[J].中国生态农业学报,2012,20(8):1066-1071,6.基金项目
中国科学院知识创新工程重要方向项目(KZCX2-YW-T07)和外国专家局项目(20100491005-8)资助 （KZCX2-YW-T07）
