【作者】 张利静；

【导师】 李伟；

【作者基本信息】 中国科学院研究生院（武汉植物园） ， 生态学， 2006， 硕士

【摘要】 本文以黄花水龙(Jussiaea.stipulacea Ohwi)为研究对象，初步研究了其在不同程度富营养化水质中的生长特性和在高浓度镉污染水质中的耐受能力，探讨其在水污染生物修复工程中的广泛利用的可能性和发掘潜力。并对其在不同水深和底质条件下的生长情况进行了研究，以掌握关于它的基本生长特性的第一手资料。具体结论如下： 1、浅水、底质肥沃是黄花水龙的最佳生境。由于黄花水龙体内有发达的气隙组织，此生境中底质的强还原性对黄花水龙不构成氧胁迫。在试验期内，当被作为漂浮类物种种植时，黄花水龙仅靠吸收水体中的营养也能保持一定速率的生物量增长。 2、黄花水龙在富营养化水体中飘浮生长时，在三到四周内能保持良好的生长状况。而作为黄花水龙克隆繁殖构件的主茎，在实验期间始终保持着较高的伸长和生物量增长速率。 3、富营养化水体中氮的下降效率在不同富营养化程度水体间的没有明显的变化趋势，而磷的下降效率在富营养化程度高的水体中效率较高。 4、黄花水龙对水体中镉离子浓度有极高的耐受能力，在本实验的条件下，最高耐受值在30-60mg／L之间。 鉴于上述实验结果，综合考虑黄花水龙的既可以根着生长又可以漂浮生长的特性，后期生物量的潜在利用价值，以及它本身作为本土物种在和外来物种相比时所具有的优越性，可以认定，黄花水龙在污染水质生物修复方面有很大的研究和应用潜力。更多还原

【Abstract】 For the purpose to be used in polluted water bio-remedy, this paper shows the pilot study of the growth characteristic of Jussiaea. stipulacea Ohwi in different eutrophic water body and high Cd²⁺ contented water. Besides, growing in different substtrate with different overlying-water depth was studied to get first-hand information about its growth characters. The results are as follows: 1、 Fertile lake-sediment with shallow water above is the best habitat for J.stipulacea Ohwi. Although reducing conditions in lake-sediment can greatly affect the root system of aquatic macrophytes, J.stipulacea Ohwi can survive this oxygen defiant stress via its developed ventilation system. When be used as floating species, J.stipulacea Ohwi.can make its living with nutrition supplied by water body. 2、 Growing in eutrophic water bodies as a floating species, J.stipulacea Ohwi shows well growing only during the first three or four weeks. As the cloning propagation module, all the main stems of J.stipulacea Ohwi in each water treatments keep high stretch rate and biomass growing rate all the time.3、 The declining rates of TN in water among different eutrophic water bodies shows no obvious changing tendency. While the declining rates of TP in water is higher in severe eutrophic water bodies.4、 J. stipulacea Ohwi possesses a strong endurance ability to the Cd²⁺ contented in water. With our experimental condition, the top concentration of Cd²⁺ contented in water J. stipulacea Ohwi can endure lies between 30mg/L and 60mg/L.Considering the above experimental results, and its growth characteristic that can either rooting to substrate or floating at surface layer of water body, the biomass’ potential value for use, the predominance as a kind of autochthonous aquatic plant versus those exotic species, J. rapens L. thus be judged as a new species with great value for deep research and practice utility.更多还原