| 徐芳,宗俊勤,牛佳伟,陈静波,李丹丹,李兰兰,刘建秀.狗牙根与多花黑麦草轮作对富营养水体的净化能力研究[J].农业环境科学学报,2015,34(7):1341-1348. |
| 狗牙根与多花黑麦草轮作对富营养水体的净化能力研究 |
| Purification of Eutrophic Water by Bermudagrass and Ryegrass Rotation |
| 投稿时间：2015-02-27 |
| DOI：10.11654/jaes.2015.07.016 |
| 中文关键词: 富营养水体 水体净化 狗牙根 多花黑麦草 |
| 英文关键词: eutrophic water water purification bermudagrass ryegrass |
| 基金项目:国家重大科技专项课题研究专题(2012ZX07101-005);江苏省水利厅项目(2014001) |
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| 中文摘要: |
| 在自然光温条件的温室内,以暖季型牧草——Tifton 85狗牙根(Cynodon dactylon Tifton 85)和三种冷季型牧草——特高、美克斯、剑宝多花黑麦草(Lolium multiflorum)为试验材料,以不种植植物的重度富营养水体为对照,通过比较不同季节的供试植物与相应对照间总氮(TN)、总磷(TP)、化学需氧量(COD)的去除率差异,结合植株生物量变化及氮磷积累量的分析,研究不同季节适生植物对重度富营养的生活污水的净化效果,以优选出终年净化污染水体的植物组合。结果表明:不同季节试验结束后各供试牧草水上部分干重增加量均占总增加量的71.0%以上,植株氮磷积累量对系统去除总量的贡献率分别达76.0%和84.0%以上,供试植物的净化效果显著优于对照;温暖季节的Tifton 85处理重度富营养水体16 d后,TN、TP、COD的去除率分别为98.2%、98.3%、70.7%,TN、TP均降至非富营养浓度,COD降至中度富营养浓度;寒冷季节盖播的3个多花黑麦草对TN和TP的去除率存在显著差异,特高表现最好,分别为96.8%和92.1%, TN、TP均降至非富营养浓度,品种间COD去除率虽无显著差异,但已降至中度富营养浓度。综合以上结果,暖季型的Tifton 85净化效果优异,冷季型的特高净化效果最好,Tifton 85和特高可作为长三角地区周年水体净化的优异牧草组合进行推广。 |
| 英文摘要: |
| Purification of eutrophic water by biological methods has aroused increasing interests. Here a warm-season forage — Cynodon dactylon Tifton 85 and three cool-season forages— Lolium multiflorum(Tetragold, Jumbo and Maximus) were grown in rotation to examine their purifying abilities for eutrophic water in order to screen out a proper forage combination that can be used year-roundly. The removals of total nitrogen(TN), total phosphorus(TP), and chemical oxygen demand(COD) in the eutrophic water and the nitrogen(N) and phosphorus(P) accumulation in the plants were employed as the indexes for evaluating performance of those plants. The dry biomass of the above-water parts of those plants accounted for more than 71.0% of total dry biomass, and the N and P uptake by above-water parts amounted to more than 76.0% and 84.0% of the total removal by the system, respectively. Purifying abilities of those different plants were significantly higher than that of the control. After 16 days of Tifton 85 treatment, the removal efficiencies of TN、TP and COD were 98.2%,98.3% and 70.7%, respectively, and the TN and TP reduced to non-eutrophic levels while COD dropped to moderate eutrophic level. After 25 days of growth, Tetragold showed the best performance among three ryegrass cultivars, its TN and TP removal efficiencies were 96.8% and 92.1%, respectively, and the COD dropped to moderate eutrophication. All the results indicate that Tifton 85 and Tetragold could be used as an excellent forage combination for purifying eutrophic water over the whole year in the delta region south of Yangtze River. |
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