研究论文
叶勇,谭凤仪,卢昌义.红树林系统处理牲畜废水营养盐的研究[J].环境科学学报,2001,21(2):224-228
红树林系统处理牲畜废水营养盐的研究
- Removal of livestock wastewater nutrient by mangrove systems
- 摘要：在2种盐度条件下(淡水与盐度30的人工海水)通过温室盆栽系统对比研究了2种主要红树植物木榄和秋茄对牲畜废水的处理效应.牲畜废水的加入使植物体P含量增加1-4倍,N含量增加0.04-1.30倍.淡水条件下秋茄和木榄系统N的处理效率分别为84.3%和95.5%,海水条件下则为92.7%和98.0%.淡水条件下秋茄和木榄系统P的处理效率分别为79.2%和91.8%,海水条件下则为88.0%和97.8%.盐度对秋茄植物体N的去除无显著效应.2种植物体对P的处理效率为4%,远比N的处理效率低.废水来源的营养盐大多被
- Abstract：The present investigation compared the capacity of greenhouse pot-cultivation systems under two salinity conditions (freshwater and saline water) with two main mangrove species, Bruguiera gymnorrhiza and Kandelia candel, to remove nutrients from livestock wastewater.The increasing times of P contents in plants receiving livestock wastewater were 1-4 times that of the controls, much more than those of N contents (0.04-1.30 times).The removal efficiencies of N nutrients from livestock wastewater were 84.3% and 95.5% respectively by Kandelia candel and Bruguiera gymnorrhiza pot-cultivation systems under freshwater condition and 92.7% and 98.0% under saline water condition.P nutrient removal efficiencies by Kandelia candel and Bruguiera gymnorrhiza systems under freshwater condition were 79.2% and 91.8% respectively and 88.0% and 97.8% under saline water condition.Salinity condition has no significant effect on the N nutrient removal by Kandelia candel plants.The P removal efficiencies by Kandelia candel and Bruguiera gymnorrhiza plants were less than 4% and much lower than those of N.Under both salinity conditions, higher N/P absorption ratios by plants were found in Bruguiera gymnorrhiza plants (11.64 and 10.64 under freshwater and saline water conditions respectively).Most of the nutrients retained to the systems due to the discharges of livestock wastewater were removed by soils.Most N nutrients retained in soils lost away from the systems.
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