Experimental research on growth of Potamageton crispus and Elodea nuttallii under different polluted water

The growth of Potamageton crispus and Elodea nuttallii in three different water bodies with water quality inferior to class Ⅴ was carried out in the lab.Results show that:(1)both Potamageton crispus and Elodea nuttallii can grow in the three different water bodies if the light compensation point can be satisfied,and the adaptability of the latter is better than the former,no matter from the apparent or the protective enzyme systems;(2)during the experiment,the chlorophyll of both shows a tendency of declining,which means that the macrophytes can not grow well in the polluted water;(3)both Potamageton crispus and Elodea nuttallii grow much better in the water of Miaojia River than in the water of Xuejia River and Zhuhui River.