菹草(Potamogeton crispus)的生态习性和在京密引水渠的发生规律研究  

Study on Ecological Habits of Potamogeton crispus and Its Growth in Jing Mi Cannal,Beijing

作　　者：任久长[1,2] 乔建荣[1,2] 董巍 戴长亮[1,2] 

机构地区：[1]环境模拟与污染控制国家重点实验室 [2]北京大学环境科学中心

出　　处：《北京大学学报（自然科学版）》1997年第6期749-755,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

摘　　要：菹草是两年生、喜低温的沉水植物，近年来在京密引水渠大发生阻碍水流。通过现场调查和室内试验，对菹草的生态习性和在引水渠发生规律进行研究，表明菹草在北京地区是芽殖体越夏、幼苗越冬、春末夏初呈指数增长，生物量累积曲线为Ｓ型。在京密引水渠的各个断面均有菹草发生，但大发生位于下游的中富营养渠段，发生期为５～６月中。提出菹草的控制措施及其控制的最佳时期。The over growth of Potamogeton crispus in Jing mi canal has resulted in the obstruction of water flow during recent years.Using approaches of laboratary experiment and field investigation, P.cripspus is a kind of submerged macrophyte,its ecological habits,development stages and population dynamics has been carried on in this paper. P.cripspus has a natural inclination for low water temperature.The phrase of turion over summer and germling over winter are two specific property of the life history of P.crispus. It grows expeonentially in later spring and early summer,making its biomass accumalation curve in “S” shape. P.crispus happens in every section of Jing mi Canal,and grows best in the lower reaches of the Canal during May and June,where the water is on meso eutroficational state.The manage measures and optimum time of controlling P.crispus are mentioned in this paper.

关 键 词：沉水植物 菹草 引水渠 水生生态 

分 类 号：Q949.712.2[生物学—植物学] X171[环境科学与工程—环境科学]