不同磷水平对砷污染土壤中油菜生长的影响  

Effects of different soli P concentrations on rape(Brassica napus) growth and As accumulation in arsenic contamination soil

作　　者：刘全吉[1,2] 郑床木[2] 孙学成[1] 谭启玲[1] 苏静君[1] 胡承孝[1] 

机构地区：[1]华中农业大学微量元素研究中心,湖北武汉430070 [2]中国农科院农业质量标准与检测技术研究所,北京100081

出　　处：《广东农业科学》2011年第17期52-54,共3页Guangdong Agricultural Sciences

基　　金：教育部新世纪优秀人才支持计划项目(NECT-04-0731)

摘　　要：采用盆栽试验研究了不同磷肥水平对砷污染土壤中油菜生长和吸收累积砷的影响。结果表明,在200 mg/kg砷污染土壤中,没有施入磷肥的情况下,油菜几乎不能生长,植株僵硬,趋于死亡,产量极低。当分别施入0.2 g/kg和0.4 g/kg磷肥后,油菜株高、生物量和产量等指标均显著提高,砷毒害作用显著降低。在P0.2和P0.4两个磷水平下,油菜根系砷含量较对照分别提高171%和111%;茎叶中砷含量较对照分别提高24.45%和13.0%;角果皮中砷含量较对照分别增加44.49%和345%。磷肥的施用,显著提高了砷在油菜各部位的含量。与P0.2处理相比,P0.4处理下油菜根系、茎叶中砷含量有降低趋势,但角果皮中砷含量显著增加。不同浓度磷肥的施用促进了砷由地下向地上部分转移,尤其是向角果皮中转移。随着土壤中磷浓度的增加,油菜籽粒中砷含量也逐渐增加,但均没有超过0.7mg/kg国家安全标准。A pot experiment was carried out to investigate the effects of different soil P concentrations on rape（Brassica napus） growth and As accumulation under soil As pollution stress.The results indicated that As was very toxic to rape and decreased rape height,biomass and yield significantly without P fertilizer application when soil As concentration was 200 mg/kg.However,rape height,biomass and yield increased significantly compared with the control,when soil P treatments were P0.2 and P0.4,respectively.The As concentration of rape root,shoot and rind increased by 171%,24.45%,44.49% and 111%,13.0%,345%,respectively when soil P treatments were P0.2 and P0.4.The application of P fertilizer enhanced As accumulation in rape tissue.Compared with P0.2,As concentration of rape tissue decreased except rind when the treatment was P0.4.P enhanced the transformation of As from rape root rind.The As concentration in oilseed increased with soil P concentration increased but did not exceeded the maximum permissible limit for food stuffs of 0.7 mg/kg.

关 键 词：砷污染 磷水平 油菜 

分 类 号：X131.3[环境科学与工程—环境科学]