不同磷质量浓度对穗花狐尾藻和轮叶黑藻生长的影响  

Effect of phosphorus concentration on growth of Myriophyllum spicatum and Hydrilla Verticillata

作　　者：郭俊秀[1,2] 许秋瑾[1] 金相灿[1] 扈学文[1] 李涵[1,3] 

机构地区：[1]中国环境科学研究院湖泊生态环境创新基地/国家环境保护湖泊污染控制重点实验室,北京100012 [2]内蒙古农业大学农学院,呼和浩特010018 [3]中国矿业大学,北京100083

出　　处：《环境科学学报》2009年第1期118-123,共6页Acta Scientiae Circumstantiae

基　　金：国家重点基础研究发展计划(973)资助项目(No.2002CB412307)~~

摘　　要：实验研究了不同质量浓度(0.02、0.1、0.2、0.4、0.8 mg.L-1)磷对穗花狐尾藻和轮叶黑藻生长状况的影响.结果显示,当磷质量浓度为0.2 mg.L-1时,是轮叶黑藻适宜生长的磷质量浓度,表现为分枝数、株高和根长均显著增加且达到最大,而穗花狐尾藻的适宜生长磷质量浓度为0.4 mg.L-1.两种沉水植物株高和根长增加量在磷质量浓度小于0.2 mg.L-1时,表现为轮叶黑藻大于穗花狐尾藻;当磷质量浓度大于0.4mg.L-1时,表现为穗花狐尾藻大于轮叶黑藻.实验结果表明,穗花狐尾藻比轮叶黑藻更能耐受高质量浓度的磷,并且两种沉水植物适宜生长的磷质量浓度都高于目前富营养化湖泊水体中的磷质量浓度,也远高于湖泊富营养化的磷质量浓度标准(0.02 mg.L-1).因此,单纯的磷质量浓度并不是富营养化水体中沉水植物退化消亡的直接原因.The effect of different phosphorus nutrition conditions （0.02,0. 1,0.2,0.4,0.8 mg· L^- 1 ） on the growth of the macrophytes Myriophyllum spicatum and Hydrilla VerticiUata was investigated. The growth of Hydrilla Verticillata was promoted when the concentration of phosphorus was 0.2 mg· L^- 1. Branch, height, and root-length all notably increased and were maximized under these conditions. But for Myriophyllum spicatum, the optimal concentration of phosphorus was 0.4 mg· L^- 1. At 0.2 mg· L^- 1 phosphorus, the height and root - length of Hydrilla Verticillata was greater than that of Myriophyllum spicatum, while at 0.4 mg· L^- 1 phosphorus the reverse was true. The results demonstrate that Myriophyllum spicatum could tolerate higher phosphorus concentrations than Hydrilla VerticiUata. However, the optimal phosphorus concentrations for the growth of both Myriophyllum spicatum and Hydrilla Verticillata exceed the phosphorus concentrations in eutrophic water bodies. So the phosphorus concentration alone cannot directly cause the degradation of submersed macrophytes in eutrophic water bodies.

关 键 词：磷质量浓度 穗花狐尾藻 轮叶黑藻 

分 类 号：X172[环境科学与工程—环境科学]