摘要
[目的]研究底栖鱼类泥鳅对水田上覆水中磷素动态的扰动效应,探讨生物扰动机制。[方法]基于模拟试验,使用离子色谱法和分光光度法,对比分析上覆水中磷素含量在有/无泥鳅活动时的差异。[结果]扰动组的TP、DTP和PP浓度在试验开始阶段与对照组无显著差异,在试验中、后期显著高于对照(P<0.05)。扰动组的PP/TP高于对照组,扰动组中TP浓度的增加主要是由于PP的增加。扰动组的D IP/DTP在试验中、后期显著高于对照(P<0.05)。[结论]底栖鱼类对水田上覆水中的磷素产生了扰动作用,增加了水稻生长可利用的磷素养分。
[Objective]The research aimed to investigate the bioturbation effects of benthic fish Misgurnus anguillicaudatus on phosphorus dynamic in overlying water of paddy field,as well as to explore the bioturbation mechanism.[Method]Based on simulated experiment,the phosphorus contents in overlying water were analyzed comparatively with and without M.anguillicaudatus using ion chromatography and spectrophotometry.[Result]The concentrations of total phosphorus（TP）,dissolved total phosphorus（DTP）and particular phosphorus（PP）in bioturbation group had no remarkable differences with those in control group in initial stage of experiment,and became significantly higher than control group in middle and late stages of experiment（P0.05）.The PP/TP ratios in bioturbation group were bigger than those in control group,the increase of TP concentration in bioturbation group was mainly due to the increase of PP.The ratios of dissolved inorganic phosphorus（DIP） to DTP,DIP/DTP,were significantly bigger than those in control group in middle and late stages of experiment（P0.05）.[Conclusion]The benthic fish had bioturbation effects on phosphorus in paddy field overlying water,which increased the available phosphorus for rice growth.
出处
《安徽农业科学》
CAS
北大核心
2010年第32期18171-18172,18189,共3页
Journal of Anhui Agricultural Sciences
基金
人力资源和社会保障部留学人员科技活动择优资助项目(人社厅发2008-86)
吉林省人才开发资金项目(吉财行指2007-259)
吉林省科技发展计划项目(20060577)
吉林省教育厅科技计划项目(2010150)
教育部留学回国人员科研启动基金项目(教外司留2005-546)
长春师范学院自然科学基金项目(2009002)
东北师范大学自然科学青年基金项目(20050406)
关键词
底栖鱼类
水田
生物扰动
磷素
上覆水
Benthic fish
Paddy field
Bioturbation
Phosphorus
Overlying water
