农业环境科学学报Issue(2)：361-369,9.DOI:10.11654/jaes.2015.02.021
冬季水生植物分解过程及其对水质的影响研究
Decomposition of Aquatic Plants During Winter and Its Influence on Water Quality
摘要
Abstract
In winter large proportion of aquatic plants die, decompose and then release nitrogen and phosphorous nutrients into water, which consequently impacts water quality. An indoor simulation experiment was carried out to study the decomposition process of three aquatic plants including Phragmites australis, Potamogeton malaianus and Limnanthemun nymphoides, typical in Lake Taihu, in winter and the sub—sequent influence on water quality. Phragmites australis, P. malaianus and L. nymphoides had a fast decomposition rate during the first 4 days but decomposed much slowly from day 5 to day 48 in terms of biomass loss. The dry matter of these three plants respectively decreased by 15.9%, 12.9%and 38.8%in 4 days. Significant differences were observed in the remained dry matter of three plants(P<0.01). The de—composition rate k was significantly negatively correlated with plant C/N and C/P(P<0.01, n=54). The pH and dissolved oxygen(DO)of the water body decreased rapidly during the first 4 days and increased slowly thereafter, and they were generally control>P. australis>P. mala—ianus>L. nymphoides. Total N levels reached the maximum value at the second day and TP attained the highest value at the fourth day. The influence of decomposition of aquatic plants on water quality was transient as no significant difference was observed in water quality parame—ters at the end of the experiment.关键词
水生植物/分解/环境因子/营养盐Key words
aquatic plants/decomposition/environmental factor/nutrients分类
资源环境引用本文复制引用
曹勋,韩睿明,章婷曦,王国祥,魏宏农,马月,冀峰,马杰..冬季水生植物分解过程及其对水质的影响研究[J].农业环境科学学报,2015,(2):361-369,9.基金项目
国家水体污染控制与治理科技重大专项（2012ZX07101-008-02）；江苏省太湖水环境治理专项基金（TH2012304）；国家自然科学基金项目（41173078）；江苏省自然科学基金 （）
