中文摘要：

在室内模拟条件下栽培苦草,通过对沉积物中碱性磷酸酶的活性和理化参数的分析,揭示了沉水植物对湖泊富营养化影响的酶学机制。研究表明：在实验条件下,表层0~2 cm沉积物碱性磷酸酶的活性种植苦草的高于无草组（p〈0.05）,且随培养时间的增加碱性磷酸酶活性增强;苦草的生长指标与碱性磷酸酶活性呈正相关,与磷含量呈负相关;碱性磷酸酶活性与总磷呈极显著负相关（p〈0.01）,因此可以将其作为评价沉积物营养状况的指标之一。

英文摘要：

Vallisneria spiralis was cultivated in the indoor simulative circumstances and the activity of alkaline phosphatase （APA） in the lake sediment and the relative physical and chemical parameters were analyzed in the purpose of probing into the submerged plant enzymology mechanism affecting eutrophication of the lake. The research showed that APA of the experimental group was significantly higher than that of the control group （p〈0.05）, and APA was enhanced with Vallisneria spiralis growing; in addition, indicators of Vallisneria spiralis growth was positively correlated with APA, but in negative correlation with phosphorus. On the other hand, APA was negatively correlated with phosphorus （p〈0.01）. So, APA can be regarded as one of parameters to evaluate trophic level of the lake sediment.