不同氮肥对鬼针草修复土壤镉污染的效果研究  

Effects of Different Nitrogen Fertilizers on Remediation of Soil Cadmium Pollution by Bidens pilosa

作　　者：熊明月 郭嘉航 张福琼 韩飞 刘剑虹[1,2,3] 杨云 钟浩[1] 黄晶心 XIONG Mingyue;GUO Jiahang;ZHANG Fuqiong;HAN Fei;LIU Jianhong;YANG Yun;ZHONG Hao;HUANG Jingxin(College of Energy and Environmental Sciences,Yunnan Normal University,Kunming 650500,China;Yunnan Provincial Observation and Research Station of Soil Degradation and Restoration for Cultivating Plateau Traditional Chinese Medicinal Plants,Yunnan Normal University,Kunming 650500,China;Yunnan Provincial Renewable Energy Engineering Key Laboratory,Yunnan Normal University,Kunming 650500,China;Wenshan Academy of Agricultural Sciences,Wenshan,Yunnan 663099,China)

机构地区：[1]云南师范大学能源与环境科学学院,云南昆明650500 [2]云南师范大学高原特色中药材种植土壤质量演变退化与修复云南省野外科学观测研究站,云南昆明650500 [3]云南师范大学云南省农村能源工程重点实验室,云南昆明650500 [4]文山州农业科学院,云南文山663099

出　　处：《江西农业大学学报》2022年第6期1592-1600,共9页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家自然科学基金项目(31800443)。

摘　　要：【目的】为探究不同氮肥对超富集植物鬼针草修复土壤镉(Cd)污染的效果。【方法】通过用总Cd含量为60 mg/kg的土壤进行盆栽试验,设置空白和添加尿素、氯化铵、硝酸钙、硝酸铵钙5组处理,分析植物生长指标及重金属Cd的含量等。【结果】施加尿素、氯化铵、硝酸铵钙均能显著增加土壤中Cd向鬼针草转移(P<0.05)。尿素、氯化铵、硝酸铵钙施用后鬼针草Cd的转移系数分别增加了7.82%、11.78%、18.82%,鬼针草对土壤Cd污染的净化率分别提高了14.39%、24.27%、141.55%,显著提高了鬼针草对Cd的吸收效果;其中施用硝酸铵钙使鬼针草吸收Cd的效果最好。【结论】在施加氮素量相同的情况下,施用硝酸铵钙对鬼针草修复土壤Cd污染的效果最佳。研究为氮肥在重金属污染土壤植物修复中的应用提供了参考,也为植物修复矿区土壤、抛荒地、工业污染区等提供了技术支持。[Objective]This study aims to explore the effects of different nitrogen(N)fertilizers on the restoration of soil cadmium(Cd)pollution by hyperaccumulator plant Bidens pilosa.[Method]A green house experiment was conducted with 60 mg/kg total Cd content soil.Five treatments,including CK treatment(added with no N fertilizer),urea,ammonium chloride,calcium nitrate and calcium ammonium nitrate added treatments were set,respectively.Plant growthand the content of heavy metal Cd were analyzed.[Result]Urea,ammonium chloride and calcium ammonium nitrate added treatments significantly increased the transfer of Cd from soil to B.pilosa(P<0.05).Urea,ammonium chloride and calcium ammonium nitrate added treatments increased the Cd transfer coefficients of B.pilosa by 7.82%,11.78%and 18.82%respectively;they increased Cd purification rate of B.pilosa by 14.39%,24.27%and 141.55%,respectively.Among all treatments,calcium ammonium nitrate added treatments had the best effect on B.pilosa absorption of soil Cd.[Conclusion]With the same N added rate,the addition of calcium ammonium nitrate had the best effect on increasing B.pilosa restoration Cd contaminated soil.This study provided a reference for adding nitrogen fertilizers in phytoremediation of Cd contaminated soil,and it also provided technical support for phytoremediation of soil in mining areas,abandoned land and industrial polluted areas.

关 键 词：氮肥类型 鬼针草 镉污染 土壤修复 

分 类 号：X173[环境科学与工程—环境科学] X53