施肥对花红苋菜吸收和积累土壤中PAHs的影响  

Influence of fertilization on flower red amaranth uptake and accumulation of PAHs in soil

作　　者：尹春芹[1,2] 蒋新[1] 杨兴伦[1] 卞永荣[1] 王芳[1] 

机构地区：[1]中国科学院南京土壤研究所,土壤与农业可持续发展国家重点实验室,江苏南京210008 [2]中国科学院研究生院,北京100049

出　　处：《中国环境科学》2008年第8期742-747,共6页China Environmental Science

基　　金：国家自然科学基金资助项目(40621001);国家“863项目”(2007AA061101);中国科学院知识创新工程项目(kzcx2-yw-404);国家“973”项目(2002CB410805)

摘　　要：施用农业生产中广泛使用的无机氮肥和有机肥,以花红苋菜为典型叶菜类蔬菜,研究了不同施肥方式对蔬菜吸收和积累土壤中多环芳烃(PAHs)的影响.结果表明,蔬菜根部积累的PAHs总浓度显著大于其地上部分积累的浓度.有机肥处理下,低环PAHs在蔬菜根中的生物富集因子(RCFs)显著小于其余处理的对应值,表明添加有机肥更有利于降低低环PAHs的生物有效性.土壤低环PAHs的RCFs值显著大于高环PAHs的RCFs对应值.种植蔬菜后,根际土壤PAHs的总浓度显著降低;有机肥处理比无机氮肥处理有利于根际土壤中PAHs的消解.Using inorganic and organic fertilizers applied widely in agricultural production, using flower red amaranth as a representative leafy vegetable, the influence of different fertilization on uptake and accumulation of polycyclic aromatic hydrocarbons （PAHs） in soil was studied.Total PAl-Is concentrations in the vegetable roots were significantly higher than those in their aerial parts. The low molecular weight PAHs concentration factors of vegetable roots （RCFs） in organic fertilization treatment were significantly lower than those in the residual treatments, indicating that adding organic fertilizer was more favorable to lower the biological efficiency of low molecular weight PAHs. The RCFs values of low molecular weight PAils in the soil were significantly higher than those of high molecular weight PAHs. After planting vegetable, the total concentrations of PAHs in rhizosphere soil lowered significantly. Organic fertilizer treatment was favorable to PAHs dissipation in rhizosphere soil than inorganic fertilizer treatment.

关 键 词：施肥 蔬菜 多环芳烃 吸收 积累 

分 类 号：X53[环境科学与工程—环境工程]