您好，欢迎访问新疆农业科学院 机构知识库！
新疆农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

EFFECT OF CHITOSAN MODIFIED BIOCHAR ON ACCUMULATION OF Cu AND Cd IN LETTUCE

文献类型： 外文期刊

作者： Li, Shaojing 1 ; Zong, Haiying 2 ; Wang, Lu 2 ; Wang, Bin 3 ; Wang, Chengming 1 ; Song, Ningning 2 ;

作者机构： 1.Qingdao Agr Univ, Coll Sci & Informat, Qingdao 266109, Shandong, Peoples R China

2.Qingdao Agr Univ, Coll Resource & Environm, Qingdao Engn Res Ctr Rural Environm, Qingdao 266109, Shandong, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Soil Fertilizer & Agr Water Saving, Urumqi 830091, Peoples R China

关键词： Chitosan; biochar; lettuce; heavy metal; absorption

期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.489； 五年影响因子：0.479 ）

ISSN： 1018-4619

年卷期： 2020 年 29 卷 4 期

页码：

收录情况： SCI

摘要： The heavy metal sorption capacity of biochar prepared directly from biomass feedstock was relatively low, and method to improve its performance in adsorption and stability is needed. A pot experiment was conducted to investigate the effect of chitosan-modified biochar on plant growth, Cu, Cd uptake, and chemical and microbial characteristics of the rhizosphere of lettuce. Rhizosphere soil samples were analyzed for pH, concentrations of available Cu, Cd measured by diffusive gradients in thin-films (DGT) and microbial biomass carbon and nitrogen. The results showed that compared with the unmodified biochar, the application of chitosan-modified biochar significantly promoted plant biomass and decreased Cu, Cd uptake by plants with increased soil pH, decreased DGT measured Cu and Cd concentrations and increased microbial biomass carbon and nitrogen in the rhizosphere. When the application amount of chitosan-modified biochar was 5%, Cu and Cd concentrations in the shoots were decreased by 43% and 62.49% respectively, while decreased by 57.29% and 58.7% in the roots respectively. Meanwhile, the pH was increased by 0.15 units, and content of available Cu and Cd measured by DGT decreased by 67.95% and 64.29%, respectively, while the microbial biomass carbon and nitrogen were increased by 44.18% and 57.85%, respectively. Therefore, it was speculated that increased soil pH and decreased soil available Cd and Cu contents may be the main mechanism for chitosan-modified biochar to reduce Cd and Cu contents in lettuce. Chitosan-modified biochar can be used as a practical alternative soil amendment to inhibit the absorption of heavy metals by vegetables in contaminated soils and improve soil nutrient status.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：新疆农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台