期刊论文

Li, Bao-Zhen(bzli@isa.ac.cn)

中文

环境科学

0250-3301

2017

38

9

3731-3737

10.13227/j.hjkx.201701019

国家重点研发计划项目（2016YFE0101100）； “十二五”国家科技支撑计划项目（2014BAD14B01,2014BAD14B05）； 湖南省重大水利科技项目（湘水科计[2015]186-22号）；

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为了探讨水生植物绿狐尾藻(Myriophyllum aquaticum)在生态湿地系统对高铵态氮(NH_4~+ -N)的耐受及氮(N)、磷(P)吸收能力,试验设置3个高NH_4~+水平(70、210、420 mg·L~(-1))的营养液,对绿狐尾藻培养21 d,研究高浓度NH_4~+对绿狐尾藻生理及N、P吸收特征的影响. 结果表明,70 mg·L~(-1)高NH_4~+处理,绿狐尾藻生长健壮,培养21 d后,茎高和生物量分别达到40.56 cm和17.82 g·穴~(-1); 与70 mg·L~(-1)高NH_4~+对照相比, 210 mg·L~(-1)高NH_4~+处理下,绿狐尾藻丙二醛含量显著增加,但叶绿素和可溶性糖含量仍较高,说明其受到一定NH_4~+的胁迫,但不影响其正常生长,茎和生物量的生长速率与对照无显著差异...

Ammonium nitrogen (NH4+-N) at high concentrations is toxic to plants. In order to explore the NH4+-N tolerance of Myriophyllum aquaticum (M. aquaticum) and its ability of nitrogen (N) and phosphorus (P) uptake, this study used a nutrient solution with three NH4+-N levels (70, 210, 420 mg·L-1) to incubate M. aquaticum for 21 d. The characteristics of plant physiology and N and P uptake of M. aquaticum were measured. At NH4+-N of 70 mg·L-1, M. aquaticum grew healthily, and shoot height and biomass linearly increased with the increase incubation time. Relative shoot height and bioma...