摘要
[目的]探索水田养殖泥鳅于其沉积物颗粒分布的作用。[方法]以化学性质稳定的玻璃珠作为示踪颗粒,研究泥鳅扰动对水田沉积物颗粒垂直分布的影响,探讨底栖鱼类在水层-底栖界面耦合过程中的生物扰动作用。[结果]泥鳅扰动10 d后,沉积物表层示踪颗粒有43.2%向下迁移,最大迁移深度为7.5 cm,垂直迁移率为7.676×10-4g-1.cm-2.d-1。6 cm深处的示踪颗粒中,分别有39.7%和9.9%在扰动后向上和向下迁移,向上和向下最大迁移距离分别为4.5 cm和5.1 cm,垂直向上和向下迁移率分别为7.597×10-4g-1.cm-2.d-1和1.894×10-4g-1.cm-2.d-1。[结论]泥鳅扰动能影响水田沉积物颗粒的垂直分布,促进水/土界面的营养物质循环与转化。
[ Objective ] The purpose of this study was to investigate the role of breeding Misgurnus anguillicaudatus in paddy field in vertical distribution of sediment particles. [ Method] Using chemically stable glass beads as tracers, the effects of Misgurnus anguillicaudatus bioturbation on the vertical distribution of sediment particles in paddy field were investigated, and the bioturbation role of benthic fish in the coupling process of benthic-pelagic interface was discussed. [ Result] After ten days of Misgurnus anguillicaudatus bioturbation, 43.2% of the glass beads on the surface were transferred downwardly with the maximum distance of 7.5 cm, and the vertical transportation rate of sediment particles was 7. 676×10^-4g^-1·cm^-2·d^-1. At a depth of 6 cm, 39.7% and 9.9% of the glass beads were respectively transferred upwards and downwards, to the maximum distances of 4.5 cm and 5.1 cm, respectively ; and the vertical transportation rates of sediment particles were 7. 597 ×10^-4g^-1·cm^-2·d^-1 and 1. 894×10^-4g^-1·cm^-2·d^-1, respectively. [Conclusion] Misgurnus anguillicaudatus bioturbation could promote the circulation and transformation of nutrients at water/soil interface through affecting the vertical distribution of sediment particles.
出处
《安徽农业科学》
CAS
北大核心
2009年第2期703-704,共2页
Journal of Anhui Agricultural Sciences
基金
吉林省人才开发资金项目
吉林省科技发展计划项目(20060577)
吉林省教育厅科技计划项目(200716920061132006117)
人事部留学人员科技活动择优资助项目
教育部留学回国人员科研启动基金项目(教外司留2005-546)
东北师范大学自然科学青年基金项目(20050406)
关键词
泥鳅
水田
生物扰动
沉积物
垂直分布
Misgurnus anguillicaudatus
Paddy field
Bioturbation
Sediment
Vertical distribution
