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不同种类的氮肥对籽粒苋富集镉的影响
引用本文:张胜爽,勾昕,张凌云.不同种类的氮肥对籽粒苋富集镉的影响[J].科学技术与工程,2020,20(15):6286-6291.
作者姓名:张胜爽  勾昕  张凌云
作者单位:贵州师范大学地理与环境科学学院,贵阳550025;贵州师范学院地理与资源学院,贵阳550018
基金项目:贵州省科技支撑计划项目[黔科合支撑(2017)2580];贵师范大学博士启动基金
摘    要:施肥对超富集植物的重金属累积效果产生影响,分析这种影响对于超富集植物的大田应用具有一定的意义。本文以籽粒苋为研究对象,根据土壤环境质量标准设置镉浓度梯度0、2.4、4.8、9.6mg/kg,再施以铵态氮和硝态氮两种肥料。研究结果表明:(1)各处理下,籽粒苋叶Cd含量最高,范围为1.45-27mg/kg;茎次之。范围为0.90-17.15mg/kg。肥料类型对籽粒苋Cd的累积量未产生显著影响,但肥料浓度对籽粒苋Cd的累积具有显著差异(F=12.993,p<0.01);当铵态氮肥施用浓度为0.115、0.460mg/kg时,籽粒苋茎、叶Cd含量最大,分别为17.15mg/kg、27.00mg/kg。(2)土壤Cd含量受Cd添加浓度的影响,但是氮肥施用浓度和Cd添加浓度对其具有显著的交互作用(F=3.382,P<0.01);(3)籽粒苋茎和叶对Cd的累积系数具有显著差异(F=19.679,p<0.01),Cd的处理浓度对籽粒苋地上部累计系数有显著影响(F=12.362,p<0.01)。综上表明,施用适量浓度的铵态氮肥有助于籽粒苋Cd的富集,可用于土壤Cd污染的修复。

关 键 词:籽粒苋    铵态氮肥  硝态氮肥
收稿时间:2019/9/11 0:00:00
修稿时间:2020/6/14 0:00:00

Effects of different nitrogen fertilizers on Cd enrichment in Amaranthushypochondriacus L.
Zhang Shengshuang,Gou Xin,Zhang Lingyun.Effects of different nitrogen fertilizers on Cd enrichment in Amaranthushypochondriacus L.[J].Science Technology and Engineering,2020,20(15):6286-6291.
Authors:Zhang Shengshuang  Gou Xin  Zhang Lingyun
Institution:School of Geographic and Environmental Science,Guizhou Normal University Guiyang,guizhou province,;Guizhou Normal College,Guiyang,;School of Geographic and Environmental Science,Guizhou Normal University Guiyang,guizhou province,;
Abstract:The effect of fertilization on the accumulation of heavy metals in hyperenriched plants is significant to the field application of hyperenriched plants. In this paper, Aamaranthus hypochondriacus L. was taken as the research object. Cadmium concentration gradients 0, 2.4, 4.8 and 9.6mg/kg were set according to soil environmental quality standards, and then ammonium nitrogen and nitrate nitrogen were applied. The results showed that :(1) Under each treatment, the Cd content of grain amaranth leaves was the highest, ranging from 1.45-27mg/kg. Stems. The range is 0.90-17.15mg/kg. Fertilizer type had no significant effect on Cd accumulation of grain amaranth, but fertilizer concentration had significant difference on Cd accumulation of grain amaranth (F=12.993, p<0.01). When the concentration of ammonium nitrogen fertilizer was 0.115mg/kg and 0.460mg/kg, the content of Cd in stalk and leaf of grain amaranthus was the highest, which were 17.15mg/kg and 27.00mg/kg respectively. (2) The content of soil Cd was affected by the added concentration of Cd, but there was a significant interaction between the application concentration of nitrogen fertilizer and the added concentration of Cd (F=3.382,P<0.01).(3) there was a significant difference in the accumulation coefficient of Cd between stalk and leaf of grain amaranth (F=19.679, p<0.01), and the concentration of Cd had a significant effect on the accumulation coefficient of above-ground of grain amaranth (F=12.362, p<0.01). In conclusion, the application of appropriate concentration of ammonium nitrogen fertilizer can contribute to the enrichment of Cd in grain amaranth and can be used to repair soil Cd pollution.
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