排灌机械工程学报Issue(11)：977-984,8.DOI:10.3969/j.issn.1674-8530.15.0126
氮铅交互作用对小桐子生长及Pb 累积的影响
Nitrogen -lead interaction and accumulation effects of lead on growth of Jatropha curcas L.
摘要
Abstract
In order to study the interaction of nitrogen and lead and accumulation effects of heavy me-tal—Pb on Jatropha curcas L.,three nitrogen levels (N0:0,N1:300 mg,N2:600 mg)and three kinds of soil lead pollution levels (Pb0:0,Pb1:500 mg,Pb2:1 000 mg)are used for experiments. The results show that there is no statistical signification between Pb1 and Pb0 treatment,and the lead inhibits the growth and development of Jatropha curcas L.significantly,if no nitrogen fertilizer is ap-plied.However,with the increase of nitrogen fertilizer,the inhibiting effect of lead on Jatropha curcas L.is relieved,the biomass of N1Pb2 and N2Pb2 is increased by 32.0% and 8.1% compared with the N0Pb2.After nitrogen fertilizer is used,the soil nitrate content is almost the same in 5,10 and 15 cm deep soil layers.Additionally,the change of soil nitrate nitrogen content in N0Pb2 and N1Pb2 is smal-ler than the other treatments.This suggests the nitrogen fertilizer can reduce the amount of lead in the plants,and improve its effective extraction.For example,the effective extractions of lead in N2Pb2 and N1Pb2 are increased by 18.1% and 27.9%,respectively,compared with that of N0Pb2.There-fore,with the increase of nitrogen content,the inhibiting effect of lead on Jatropha curcas L.is de-creased considerably,a high nitrogen content can increase the biomass of the plants and the effective extraction of lead,causing an improved restoration efficiency.关键词
土壤/氮铅交互/施氮处理/铅累积/小桐子Key words
soil/nitrogen lead interaction/nitrogen treatment/accumulation of heavy metal Pb/Jatropha curcas L分类
资源环境引用本文复制引用
王卫华,雷龙海,张志鹏,杨启良..氮铅交互作用对小桐子生长及Pb 累积的影响[J].排灌机械工程学报,2015,(11):977-984,8.基金项目
国家自然科学基金资助项目（51409136，51379004）；昆明理工大学自然科学研究基金资助项目（KKSY201423023）；云南省应用基础研究面上项目 （）
