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当前位置: 首页 > 文章 > 水深对马来眼子菜生长及氮磷去除效果的影响 南京林业大学学报(自然科学版) 2008,32 (4) 11-16
Position: Home > Articles > Effect of water depth gradient on the growth and nutrient removal ability of Potamogeton malaianus Miq. in Taihu Lake Journal of Nanjing Forestry University(Natural Sciences Edition) 2008,32 (4) 11-16

水深对马来眼子菜生长及氮磷去除效果的影响

作  者：
刘伟龙;胡维平;翟水晶;陈桥;韩红娟
单  位：
中国科学院南京地理与湖泊研究所;中国科学院水利部成都山地灾害与环境研究所
关键词：
水深;马来眼子菜;生长速率;生物量;营养盐去除;太湖
摘  要：
通过室外人工试验池栽培,对太湖马来眼子菜的生长特征和氮磷去除效果进行了研究。结果表明:生长初级阶段,较浅的水深能明显促进马来眼子菜的生长。不同水深的马来眼子菜生物量变化介于810~2 941 g/m3。生长后期,随水深的增加,植株高度呈上升趋势,其生物量相应增加。马来眼子菜的生物量、生长密度对水深的响应显著,在利用马来眼子菜对浅水湖泊进行生态系统恢复时,水深控制在100 cm,植株生长态势和对水体氮磷的去除效果最好。
译  名：
Effect of water depth gradient on the growth and nutrient removal ability of Potamogeton malaianus Miq. in Taihu Lake
作  者：
LIU Wei-long1,2,HU Wei-ping2*,ZHAI Shui-jin2,3,CHEN Qiao2,3,HAN Hong-juan2,3(1.Chengdu Institute of Mounuain Hazards and Environment CAS,Chengdu 610041,China;2.Nanjing Institute of Geography & Limnology CAS,Nanjing 210008,China;3.Graduate School Chinese Academy of Sciences,Beijing 100039,China)
关键词：
Water depth;Potamogeton malaianus;Growth rate;Biomass;Nutrient removal;Taihu Lake
摘  要：
The effect of water depth gradient on the growth and nutrient removal rate of the submerged macrophytes Potamogeton malaianus,a dominant species in Taihu Lake,was examined in an outdoor pond experiment.At the beginning of the growth period,lower water depth increased the growth rate of P.malaianus.The growth rate reached 2.04 cm/d at the water depth about 60 cm,while 0.88 cm/d at the water depth about 180 cm.During 82 days growth period,the stem height of P.malaianus was 180 cm and the growth rate was 2.04 cm/d,while the stem height was 86 cm and the growth rate reached only 1.07 cm/d at 60 cm water depth.The stem height and the water depth was positive correlation along the water depth gradient.The biomass of P.malaianus ranged from 810 g/m3 to 2 941 g/m3.The biomass and stem height increased with the water depth.The aboveground concentration of nitrogen and phosphorus of P.malaianus was 86.43 mg/g and 5.12 mg/g,respectively at the 100 cm water depth.The TN and TP removal rate also reached the highest value of 87.6 mg/g and 40.1 mg/g,respectively at the 100 cm water depth.Compared with the TN removal rate,TP removal rate was relatively low in the different water depth gradient.TN removal rate of P.malaianus was 2.87 times of its TP removal rate. The biomass and density of P.malaianus showed an active response to the water depth gradient.The experiments showed the optimal water depth on the growth of P.malaianus and its TN and TP removal rate was 100 cm.

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