【作者】 曾巧云； 莫测辉；

【Author】 ZENG Qiao-Yun1, MO Ce-Hui2 (1.College of Resources and Environment, South China Agricultural University, Guangzhou 510642, China; 2.Department of Environmental Engineering, Jinan University, Guangzhou 510632, China)

【机构】 华南农业大学资源环境学院； 暨南大学环境工程系；

【摘要】 在邻苯二甲酸二(2-乙基已基)酯(DEHP)不同污染程度的水稻土上盆栽8种不同基因型菜心,应用GC/MS技术,研究DEHP在不同基因型菜心-土壤系统中的累积效应和分布规律。结果表明,不同基因型菜心茎叶和根系对DEHP的吸收累积存在明显差异,其中新选45天油菜心和油青60天菜心茎叶中DEHP的含量相对较高,特青60天菜心和新选油青四九菜心茎叶中DEHP的含量相对较低;亚蔬全年油绿甜菜心、油青60天菜心和四九-19菜心根系中DEHP的含量相对较高,新种油青四九-31菜心和新选油青四九菜心、特青60天菜心根系中DEHP的含量相对较低。各基因型菜心根系中DEHP的含量均高于其茎叶,其含量高低关系较复杂,部分基因型菜心茎叶中DEHP的含量与叶面积大小存在一定的正相关关系,且与污染程度有关。盆栽后新选油青四九菜心和特青60天菜心土壤中DEHP的残留量较高,盆栽佰顺811菜心、亚蔬全年油绿甜菜心、油青60天菜心和新选45天油菜心土壤中DEHP的残留量较低。总体上,油青60天菜心茎叶和根系中DEHP的含量均较高,而土壤中DEHP的残留量较低;新选油青四九菜心茎叶和根系中DEHP的含量均较低,土壤中DEHP的残留量却较高。更多还原

【Abstract】 Eight genotypes of Brassica parachinensis were pot-cultured in paddy soil with different pollution levels of di(2-ethylhexyl)phthalate(DEHP) and the concentrations of DEHP in plants and soils were determined by GC/MS to investigate the distribution features of DEHP in various genotypes of Brassica parachinensi-soil systems. The results show that the concentrations of DEHP in the shoots and roots of eight genotypes of Brassica parachinensis are significantly various, with relatively higher concentrations of DEHP in shoots for Xinxuan-45 and Youqing-60,but contrarily for Teqing-60 and Xinxuanyouqingsiqiu,while relatively higher concentrations of DEHP in roots for Yashuquannianyoulu,Youqing-60 and Siqiu-19, but contrarily for Xinzhongyouqing-31, Xinxuanyouqingsiqiu, and Teqing-60. All concentrations of DEHP in shoots are lower than those of which in roots and some of them are positively with leaf areas to some extent. The concentrations of DEHP in soils grown Xinxuanyouqingsiqiu and Teqing-60 are relatively higher while the situations are contrary for Baishun-811, Yashuquannianyoulu, Youqing-60 and Xinxuan-45. On the whole concentrations of DEHP in soils grown Youqing-60 are lower but concentrations of DEHP in its shoots and roots are both higher, while on the contrary concentrations of DEHP in soils grown Teqing-60 and Xinxuanyouqingsiqiu are higher but concentrations of DEHP in their shoots and roots are both lower.更多还原