%0 Journal Article
%T Effect of application of P fertilizer on efficiency of As removal from As-contaminated soil using phytoremediation: Field study<br>磷肥对砷污染土壤的植物修复效率的影响:田间实例研究
%A LIAO Xiaoyong
%A CHEN Tongbin
%A XIE Hua
%A XIAO Xiyuan
%A <br>廖晓勇
%A 陈同斌
%A 谢华
%A 肖细元
%J 环境科学学报
%D 2004
%I 
%X Phytoremediation is a promising new technology that using hyperaccumulating plants to remove heavy metals. A field experiment was conducted to study the effect of P fertilizer on growth of and As accumulation in Pteris vittata L., an As-hyperaccumulator. Yields of P. vittata were enhanced with increasing P addition, however there was no further increase when rate of P addition was more than 200kg·hm-2. Application of P fertilizer could enhance As concentration, and As concentration in the aboveground of P. vittata was depressed because of excessive P addition. Theoretically, As concentration of plant reaches a maximum of 1622mg·kg-1 when rate of P addition is 340kg·hm-2. There was a significantly positive relationship between rates of P addition and P concentrations in the aboveground. Plant treated with 200 kg(P)·hm-2, accumulated 3.74 kg(As)·hm-2 in its aboveground part, which was 2.4 times more than the control and 1.2 times more than that in plant treated with 600 kg (P)·hm-2. After 7 months of the experiment, soil As concentrations were significantly reduced in all treatments at harvest compared to those before transplanting. When rate of P addition was 200kg·hm-2, efficiency of As removal was the highest (7.84%), while efficiencies of As removal at control and 600 kg·hm-2 treatments were 2.31% and 6.63%, respectively. The highest efficiency of As removal in theory could be achieved at 369kg·hm-2 P addition. Moreover, the results also showed that P application was helpful to maintain a balance of available As between before transplanting and after harvest. Application of P fertilizer is necessary for phytoremediation using As-hyperaccumulator; and optimized P application could significantly enhance the efficiency of As removal from contaminated soils.
%K phytoremediation
%K Pteris vittata L
%K arsenic
%K P fertilization
%K efficiency of removal<br>植物修复
%K 蜈蚣草
%K 砷
%K 磷肥
%K 修复效率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=E099D43FDA8782B9&yid=D0E58B75BFD8E51C&vid=B91E8C6D6FE990DB&iid=38B194292C032A66&sid=366B1248A15658C5&eid=8C5DE51F0A009A0F&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=51&reference_num=35