摘要
采用水域浮床无土种植方法，以人工模拟池为试验场所，在池内的富营养化水体（ＫＮ和ＴＰ含量分别为２０８４和０２４８ｍｇ／Ｌ）表面种植水稻，通过水稻的吸收和吸附作用，去除水体中的Ｎ、Ｐ元素，以实现变废为宝，净化水质，并使水体产生良性循环．研究表明，在水深１４ｍ左右，水面的浮床覆盖率分别为２０％、４０％、６０％条件下，通过水稻自分蘖至成熟历时８４天的处理，对全池水体中ＫＮ的净去除率分别为２９０％、４９８％和５８７％，ＴＰ的净去除率分别为３２１％、４２０％和４９１％．试验结果为利用浮床陆生植物治理富营养化水域提供了科学依据．
Experiments were carried out in artificially eutrophicated water bodies in cement ponds with the concentrations of TP at 0248 mg/L and KN at 2084 mg/L and without any interference from natural environment. On the surface, rice was transplanted on floating beds for the purpose of removing nutrients from water by adsorption of rice roots so that excessive nutrients could be utilized usefully. At the meantime, water could be purified and the benign recycling of water bodies could be maintained. When the floating bed coverage rates were set up at 20%,40% and 60% in about 1.4 m of water depth, for the period of 84 days from tellering to harvest stage, the removal rates of TP and KN in water reached 32.1%, 42.0% and 49.1%, 29.0%, 49.8% and 58.7%, respectively. The results show that the design is not only feasible but also effective, providing the scientific basis for applying terrestrial economic plants on flaoting beds to purify eutrophicated water bodies.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1998年第5期489-494,共6页
Acta Scientiae Circumstantiae
基金
国家自然科学基金
日本丰田基金
关键词
水稻
浮床
富营养化
氮
磷
水体污染
污染治理
rice, floating beds, eutrophicated water body, N,P,removal efficiencies.
