摘要
[目的]为揭示环境因子对巢湖沉积物-水界面营养盐交换的影响机制。[方法]在实验室控制条件下,研究各环境因子(上覆水浓度、温度、pH值、DO条件)对巢湖沉积物湿样中NH4+释放的影响。[结果]随着温度的上升和上覆水NH4+浓度的降低,沉积物中NH4+释放量显著增加;pH值对NH4+释放的影响比较复杂;沉积物中NH4+最大释放量在厌氧条件下是好氧条件下的6倍左右。[结论]该研究为"引江济巢"工程中巢湖的环境管理提供了一定的理论依据。
[ Objective] The aim of the research was to reveal the influence mechanism of sediment-water exchange of nutrients in Chaohu Lake. [ Method] The effects of environmental factors （overlying water, temperature, pH and dissolved oxygen concentration） on NH4^＋ release in sediment from Chaohu Lake were studied under controlled laboratory conditions. [ Results] With the rising of temperature and the decrease of NH4 concentration in overlying water, NH4＋ released from sediment increased significantly, pH had a great effect on NH4 release with a complicated mechanism. The largest release amount of NH4 under anaerobic condition was about 6 times as much as that under aerobic condition. [ Conclusion] This research would provide theoretical support for environmental management of Chaohu Lake in the project of leading water from the Yangtze River to Chaohu Lake.
出处
《安徽农业科学》
CAS
北大核心
2008年第29期12870-12872,共3页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金(50379003)
关键词
NH4+释放
环境因子
沉积物
巢湖
NH4^＋ release
Environmental factors
Sediment
Chaohu Lake
