【摘要】 为了解稀土积累对水体中藻类生长的生态效应，本文研究了单一稀土氧化镧（Ｌａ２Ｏ３）积累对水体中混合藻生长量的影响。结果表明，稀土浓度为５０、１００、２００、３００、４００、６００、８００ｐｐｍ时，对混合藻的生长多表现为抑制作用。整个试验期间藻的叶绿素（ａ）含量及藻细胞数量均随着稀土浓度的升高而降低。只是稀土浓度为１００ｐｐｍ，培养１５天时对藻产生轻微刺激作用。当稀土浓度＞４００ｐｐｍ时，混合藻的生长几乎完全被抑制。更多还原

【Abstract】 The effect of rare earth(RE) on the growth of algae was investigated.At the concentrations of 50,100,200,300,400,600 and 800 ppm,RE majorly inhibited the algal growth.The cell number and chlorophyll a decreased with the increase of RE concentration except that RE sitmulated the growth of algae at 100ppm in fifteenth day.When the RE concentration was greater than 400ppm,the algal growth was inhibited completely.更多还原