摘要
研究不同浓度的镧(La2O3)、氮(N)、磷(P)单因素溶液培养条件下,浮萍色素含量变化及浮萍对水体中N、P吸收的能力.结果表明,ρ(N)和ρ(P)分别为20和8 mg/L时,浮萍色素含量达到峰值;不同浓度La溶液培养下的浮萍色素含量均显著低于对照,ρ(La)为10 mg/L即对浮萍色素含量的增加产生抑制.培养时间(3～15 d)对浮萍色素含量的影响因培养条件不同而异,其中不同浓度N、La培养条件下其影响显著,但在不同浓度P条件下其影响则不显著.浮萍(鲜重)对水体中N和P的吸收峰值分别约为5和0.5 mg/g,且对N和P吸收的能力随N和P浓度升高呈现增强的趋势.
Studies on changes of pigments contents in duckweed （Spirodela pol）rrihza） and its absorption ability to N and P in culture solution which contained separately lanthanum （La203 ） , N or P with different concentration. The results showed that the highest pigmem contents in duckweed were found at p（N） 20 mg/L in contained N solution and at p（P） 8 mg/L in contained P solution. Tile pigment contents in duckweed treated with La were observably reduced than those without any treatment（CK）. Duckweed gowth may be inhibited above p （La） 10 mg/L. Effects of euhunng time on the pigment contents were different, there were significant influence in contained N or La solutions with different concentration, and there were not in contained P solution. The highest N and P absorbed dose from the solution were 5 mg/g FW and 0.5 mg/g FW respectively, and the absorption ability of duckweed would be imprdved when N and P concentration were increased in solution. It was suggested that duckweed could absorb N and P from the culture solution during its gowth and these characters could be used to repair lake or water eutrophication.
出处
《四川师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第6期875-879,共5页
Journal of Sichuan Normal University（Natural Science）
基金
四川省教育厅自然科学重点基金(07ZA089)资助项目
关键词
叶绿体色素
镧
氮
磷
pigments
nitrogen
phosphorus
lanthanum
