不同土壤质地条件下麦秸、铅对镉在水稻-土壤系统中迁移的影响.pdf

农业环境科学学报2011307:1295-1299
Journal of Agro-environment Science
不同土壤质地条件下麦秸、铅对镉在
水稻一土壤系统中迁移的影响
陈京都,刘萌,顾海燕',戴其根",仲晓春1,林忠成2,张洪程
(1.扬州大学江苏省作物遗传生理重点实验室农业部长江流域稻作技术创新中心,江苏扬州22509;2.昊江市农业委员会,江苏
吴江215200)
摘要:通过室外砂土和黏土的大型土柱栽培试验,研究了麦積、铅对镉在水稻-一土壤中迁移的影响。研究结果表明,在砂土和黏土
中随着水稻的生长发育,水稻植株镉含量逐渐降低,添加铅和麦秸均促进了水稻对镉的吸收,增加了水稻植株镉的含量,且铅的促
进效应大于麦秸处理。添加铅和麦秸有利于镉向籽粒的转运和提高水稻耔粒镉的富集系数,砂土中添加铅、麦秸的处理籽粒镉含量
和富集系数比镉单一处理分别增加4.0%、36.00%和41.67%、50.00%;黏土中分别增加58.62%、43.00%和46.15%、61.54%。镉进
入土壤后会随着水分流动向下迁移,在砂土中的迁移能力大于黏土。随着土壤深度的増加镉含量逐渐减少,黏土在40-60cm、砂土
在60~80cm土层中镉含量与对照含量差异不显著。添加铅和麦穑可以降低镉在土壤中向下迁移的能力,降低幅度黏土大于砂土。
关键词:水稻;土壤;镉;铅;麦秸;迁移
中图分类号:X171.5文献标志码:A文章编号:1672-2043(201107-1295-05
Effects of Wheat Straw and Lead on Cadmium Remove in Rice-soil Systems in Different Texture Soils
CHEN Jingdu, LIU Meng, GU Hai-yan, DAI Qi-gen, ZHONG Xiao-chun, LIN Zhong-cheng, ZHANG Hong-cheng
(1, Key Laboraory of Crop Genetics and Physiology of Jiangsu Povincelnnovaion enter of Rice ultivation Technology in Yangtze Valley
Ministry of Agcl e Yan zhou Unv Yan ho 50 ina; A lure Commitee of Wujiang County, Wujiang 215200
Abstract: The experiments of rice cultivated in sandy and clay il columns were conducted under oudoor condi on o investigate he effect
of wheat straw and lead on cadmium remove in reil ems in a al C na l Te resuls of he s udy indicated that the
content of cadmium in e reduce adually wit h wth and development. Both of wheat straw and lead promoted the rice to absorbed cad
mium and increased the content of cadmium in rice, which the impact of lead was greater than wheat straw. The acceleration in different
growth periods showed different in sandy and clay soil. Wheat straw and lead promoted the cadmium transported into grain and increased con
centration factor n the Cd-conaminate sil. Compa o amim sin e am he conent of cadmium and concentration factor of rc
grain increased y 44.00, 36. 0%ad 41. 67, 50. 0% respectively in sandy soil and 58.62%, 43.00%and 4615%, 61.54%in clay soil
Cadmium entered into soil and removed downward with water flow and the migration ability of cadmium in sandy soil was greater than clay
oil. ih incasing of il e h, e onent of cadmium became ess and le while e soil depth in 40-60cm of the clay soil and 60-80
cm of sandy soil the content of cadmium was similar with lank control. Wheat straw and lead reduced the migration ability of cadmium in
clay soil, which was greater than sandy soil in rice seasom
Keywords: rice; soil; cadmium; lead; wheat straw; migration
水稻是我国主要的粮食作物之一,也是容易吸收和积累镉(Cd)的粮食作物,而镉又是一种分布广泛
污染面积大的重金属元素。随着社会的发展,大量
收稿日期:2010-12-03
基金项目:江苏省农委项目:江苏省农产品质量安全产地适宜性评价
的镉进人农田生态环境中,目前我国受镉污染的耕地
国家粮食丰产科技工程项?(2006BADO2A03)
约113x1°hm2,涉及11个省(市)的25个地区。我
作者简介:陈京都(1985),男.在读博士研究生?主要从事农产品安国秸秆年产量约为6x108t,其中水稻、小麦及玉米秸
全与环境方面的研究。E-mil:chenjingdu1985@163.com
通讯作者:戴其根E-mail;qedaic@yzu.edu.cn
秆约占75%,随着环保意识的增强和作物栽培学与
万方数据