您好，欢迎访问重庆市农业科学院 机构知识库！

Phytoremediation of secondary saline soil by halophytes with the enhancement of gamma-polyglutamic acid

文献类型： 外文期刊

作者： Mu, Yue 1 ; Tang, Dong 1 ; Mao, Liang 2 ; Zhang, Dan 2 ; Zhou, Pei 2 ; Zhi, Yuee 2 ; Zhang, Jinzhong 1 ;

作者机构： 1.Southwest Univ, Coll Resources & Environm, Chongqing Key Lab Agr Resources & Environm, Chongqing 400715, Peoples R China

2.Shanghai Jiao Tong Univ, Sch Agr & Biol, Key Lab Urban Agr South, Minist Agr & Rural Affairs, Shanghai 200240, Peoples R China

3.Kaizhou Reform Res Ctr, Chongqing 405400, Peoples R China

4.Hunan Univ Arts & Sci, Coll Life & Environm Sci, Changde 415000, Hunan, Peoples R China

关键词： Secondary saline soil; gamma-Polyglutamic acid; Halophytes; Phytoremediation; Enhanced remediation

期刊名称：CHEMOSPHERE （ 影响因子：8.1； 五年影响因子：7.7 ）

ISSN： 0045-6535

年卷期： 2021 年 285 卷

页码：

收录情况： SCI

摘要： Soil salinization has severely affected the quality of tillage land in China, and most greenhouse soils in Shanghai suburb suffer from secondary salinization with high salinity levels dominated by Ca2+, Mg2+ and NO3-. In this work, a sandy loam soil (Calcaric Fluvisols) contaminated by the above ions was selected as research object, and the binding conditions and abilities of gamma-polyglutamic acid (gamma-PGA) to water-soluble Ca2+ and Mg2+ in the soil were examined, and then pot experiments were conducted to remove Ca2+, Mg2+ and NO3- by two halophytes (Sedum aizoon L., Sesbania cannabina Pers.) integrated with gamma-PGA application. The results showed that under the conditions of adding 1000 mg L-1 gamma-PGA (pH 7) and 25 degrees C, the binding efficiencies of Ca2+ and Mg2+ were 51.59% and 68.03%, respectively. Compared with Sesbania cannabina Pers., Sedum aizoon L. displayed better remediation performance for the soil with gamma-PGA application in pot experiments, and the removal efficiencies of Ca2+, Mg2+ and NO3- reached 93.25%, 94.78% and 84.26% after applying 1000 mg L-1 gamma-PGA for 56 d, respectively. Moreover, gamma-PGA application could mitigate salt stress and promote plant growth, and activate antioxidant defense systems. Compared with the control, 1000 mg L-1 gamma-PGA application significantly increased plant height and fresh weight of Sedum aizoon L., and the removal efficiencies of Ca2+, Mg2+ and NO3- increased by 45.48%, 82.62% and 69.91%, respectively. In the future, more in-depth mechanism of joint effect and field-scale investigation need to be further studied.

  • 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：重庆市农业科学院

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