文献类型：期刊文献

中文题名：柳树对水体氮素的去除率及其吸收动力学

英文题名：Removal efficiency and uptake kinetics of nitrogen in water body by Salix integra

作者：王瑛[1] 张建锋[1] 陈光才[1]

第一作者：王瑛

机构：[1]中国林业科学研究院亚热带林业研究所

年份：2012

卷号：31

期号：9

起止页码：2305-2311

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：林业公益性行业科研专项(201104055);浙江省林业科技项目资助

语种：中文

中文关键词：柳树无性系;水体污染指标;水体富营养化;吸收动力学

外文关键词：Salix integra clone; water pollution index; water eutrophication; uptake kinetics.

分类号：Q945.79

摘要：在水培条件下,研究了2种柳树(Salix integra)无性系("一支笔"和"微山湖")对模拟富营养化水体中氮素的吸收状况,并采用常规耗竭法探讨了柳树幼苗根系对NH4+-N、NO3--N的吸收动力学特征。结果表明:2种柳树无性系对低浓度模拟富营养化水体中总氮的去除率均达90%以上,是高浓度情况下的2倍;对低浓度模拟污水中总磷的去除率达80%,高浓度下则达92%,且"一支笔"对总氮、总磷的吸收效果优于"微山湖";2种柳树无性系对氮素的吸收均表现为水体中营养物质浓度越高,去除效果越好;只有NH4+-N或NO3--N存在时,"微山湖"的最大吸收速率和亲和力高于"一支笔";当有其他氮源影响时,2种柳树无性系对NH4+-N和NO3--N的吸收效率则下降至50%;研究表明,柳树对富营养化水体的生态修复作用较强,是进行面源污染生态修复的优良树种。
A water culture experiment was conducted to study the uptake of nitrogen （N） in simulated eutrophic water by 2 Salix integra clones （‘Yizhibi’ and ‘Weishanhu’）, and the routine depletion technique was adopted to approach the uptake kinetics of NH4＋-N and NO3--N by the root systems of these two clones. In low concentrations of eutrophic water, the 2 clones could effectively remove N, with the removal rate of total N being 〉90%, which was 2 times as that in high concentrations of eutrophic water. The 2 clones could also effectively remove phosphorous （P）, with the removal rate of total P reached 80% and 92% in the low and high concentrations of eutrophic water, respectively. Compared with ‘Weishanhu’, ‘Yizhibi’ had a higher efficiency in removing total N and total P, and the 2 clones performed better in higher concentrations of the simulated eutrophic water. Under the conditions of only existing NH4＋-N or NO3--N, ‘Weishanhu’ had greater maximum N uptake rate and N affinity than ‘Yizhibi’; when the other N sources existed, the NH4＋-N or NO3--N uptake rate of the two clones fell down to 50%. It was concluded that these 2 clones performed well in the ecological remediation of eutrophic water, and could be chosen as the better tree species for non-point source pollution control.