摘要
[目的]研究土壤改良剂对镉向水稻中迁移转运的影响。[方法]选取重金属镉重度污染稻田进行大田试验,研究8种钝化剂对土壤中有效态镉向水稻中迁移积累的影响,以及对土壤pH、水稻产量、稻米中镉含量的影响。[结果]通过施入钝化剂,能够显著降低土壤中镉向水稻中迁移转运,达到稻米中降镉的目的,并且能够为水稻提产增效。与CK相比,施入钝化剂能够提高土壤pH 1.3%～4. 3%,降低土壤中镉的活性;在对土壤有效态镉方面,以纳米螯合铁最为明显,最佳处理能够显著降低土壤镉的有效性76.5%;在水稻产量方面,施入钝化剂能够提高水稻产量1.01%～9.43%;在稻米镉含量方面,纳米螯合铁能够显著降低稻米中镉含量,其降幅达66.98%～78. 56%。[结论]在8种钝化剂中,复合微生物肥、制碱废渣肥、微量元素调理剂、纳米螯合铁肥在重金属镉污染农田治理中有良好的潜力。
[ Objective ] To study the effect of soil conditioner on migration and transport of cadmium into rice. [ Method] The heavy metal cadmium heavily polluted riee field was seleeted for field experiment to study the efleets of eight passivators on the migration and aeeumulation of available eadmium in rice, and the effects on soil pH, riee yield and cadmium eontent in rice. [ Result ] The passivator could aehieve the target of signifieantly redueing the Cd into the rice and rice yield. Compared with the CK, fertilization passivator could inerease soil pH by 1.3%- 4.3% and reduce the aetivity of Cd in soil. In terms of soil available eadmium, Nano-chelated iron was the best passivator that reducing the effectiveness of soil cadmium by 76.5%. In terms of rice yield, fertilization passivator could increase rice yield by 1.01%-9.43%. In terms of cadmium content in rice, Nano-chelated iron could signifieantly reduce cadmium in riee by 66.98%-78.56%. [ Conelusion ] Among eight passivators,compound microbial tertilizer, alkali-making waste residue tertilizer, microelement conditioner and nano-chelate iron fertilizer have good potential in the treatment of heavy mental cadmium contaminated farmland.
作者
金华
魏祥东
邹慧玲
杨慧敏
JIN Hua1,2,3 , WEI Xiang-dong1,3 , ZOU Hui-ling1,3,4 et al(1. College of Resources and Environment, Hunan Agrieuhural University, Changsha,Hunan 410128 ; 2. Hunan Biomeehanieal Vocational and Technical College, Changsha, Hunan 410127; 3. Southern Collaborative Innovation Center of Heavy Metals Pollution Control of Paddy Fields, Hunan Agricultural University, Changsha, Hunan 410128; 4. Library of Hunan Agrieuhural University, Changsha,Hunan 41012)
出处
《安徽农业科学》
CAS
2018年第31期53-55,76,共4页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目(4121511)
湖南省自然科学基金项目(08JJ6018)
湖南省教育厅青年基金项目(12B059)
湖南省农业厅项目(2014137)
湖南省教育工委大学生思想提升工程项目(湘教工委通[2014]89号)
关键词
土壤改良剂
CD
水稻
迁移运转
影响
Soil passivator
Cd
Rice
Migration and transport
Effect
作者简介
金华（1979-），男，湖南长沙人，讲师，在读硕士，从事环境污染检测与治理研究。;通讯作者，副教授，博士，硕士生导师，从事环境污染检测与治理研究。
