文章摘要
赵廷伟,李洪达,周薇,代允超,吕家珑.施用凹凸棒石对Cd污染农田土壤养分的影响[J].农业环境科学学报,2019,38(10):2313-2318.
施用凹凸棒石对Cd污染农田土壤养分的影响
Effects of attapulgite application on soil nutrients in Cd-contaminated farmland
投稿时间:2019-07-14  
DOI:10.11654/jaes.2019-0783
中文关键词: Cd  凹凸棒石  化学钝化修复  有效态Cd  农田
英文关键词: Cd  attapulgite  chemical passivation repair  effective Cd  farmland
基金项目:陕西省科技统筹创新工程计划项目(2016KTZDNY03-01);陕西省重点研发计划项目-重点产业创新链(2019ZDLNY01-02-01)
作者单位E-mail
赵廷伟 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 陕西 杨凌 712100  
李洪达 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 陕西 杨凌 712100  
周薇 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 陕西 杨凌 712100  
代允超 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 陕西 杨凌 712100  
吕家珑 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 陕西 杨凌 712100 ljlll@nwsuaf.edu.cn 
摘要点击次数: 3173
全文下载次数: 1483
中文摘要:
      为研究凹凸棒石黏土矿物对Cd污染农田土壤的影响,以及对植物吸收Cd的阻控作用,通过大田试验,以凹凸棒石作为化学修复剂,以Cd污染土壤为研究对象,研究了凹凸棒石修复Cd污染土壤的效果以及对作物吸收Cd的影响。结果表明:适量添加凹凸棒石对土壤速效养分无显著影响,但过量施用时(1.25 kg·m-2),导致土壤碱解氮、有效磷含量分别降低6.76 mg·kg-1和7.34mg·kg-1;添加凹凸棒石会显著提高土壤pH和CEC含量,凹凸棒石添加1.25 kg·m-2时,土壤pH最高可增加0.51个单位、CEC升高6.29 cmol·kg-1;添加凹凸棒石会显著降低土壤有效态Cd含量,随其添加量的增加有效态Cd含量最高可降低27.66%(添加量1.25kg·m-2);添加凹凸棒石能显著降低作物籽粒中Cd含量,添加量为1.25 kg·m-2时,油菜籽粒中Cd含量可降低35.19%,小麦籽粒中Cd含量可降低37.29%。由于凹凸棒石的过量施用会导致土壤肥力下降,因此,在耕种农田上利用凹凸棒石进行Cd污染的化学修复,一定要控制施用量和施用频次,在修复的同时尽量不要使土壤肥力水平降低。
英文摘要:
      To investigate the effects of attapulgite clay minerals on cadmium-contaminated farmland soils and the impedance control of Cd uptake by plants, this study treated attapulgite as a chemical repair agent and applied it to Cd-contaminated soils. The effects of attapulgite application rates on the remediation of Cd-contaminated soil and amount of Cd uptake by plants were evaluated. The results showed that only attapulgite application rates greater than 1.25 kg·m-2 reduce nitrogen and phosphorus available in the soil by 6.76 mg·kg-1 and 7.34 mg·kg-1, respectively. In addition, the application of attapulgite significantly increases soil pH and CEC content. For instance, attapulgite of 1.25 kg·m-2 reduces the effective Cd content in soil by 27.66%, while increasing soil pH by 0.51 and CEC by 6.29 cmol·kg-1,respectively.The results also showed that Cd content could be reduced by 35.19% in rapeseed and 37.29% wheat grains at the same attapulgite application rate.However, excessive application of attapulgite can lead to a decline in soil fertility; as such, appropriate application rates of attapulgite and intervals between two applications should be used to repair the Cd-contaminated farmland to control pollution while maintaining soil fertility.
HTML    查看全文   查看/发表评论  下载PDF阅读器