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1. A comparative study on the efficiency of biodegradable EDDS and micro-electric field on the promotion of the phytoextraction by Commelina communis L. in Cu-contaminated soils

Author:
Wang, Junfeng; Zhu, Qingyun; Shan, Yangong; Wang, Yuhui; Song, Xinshan; Lei, Xiaohui
Source:
Geoderma 2018 v.314 pp. 1-7
ISSN:
0016-7061
Subject:
Commelina communis; biodegradability; copper; enzyme activity; heavy metals; leaves; metabolism; nutrients; peroxidase; phytoremediation; roots; shoots; soil
Abstract:
... Phytoextraction has been considered as an attractive option technique for the remediation of heavy metals contaminated soils. In this study, Commelina communis L. (Control), and plant with EDDS (5mmolkg−1) or micro-electric field (0.5Vcm−1) was performed to treat Cu-contaminated soils spiked by Cu content of 0, 100, 200, 400, 600mgL−1. Compared with the Control system, when biodegradable chelant o ...
DOI:
10.1016/j.geoderma.2017.10.057

2. Dynamics of soil nitrogen availability during post-agricultural succession in a karst region, southwest China

Author:
Xiao, Kongcao; Li, Dejun; Wen, Li; Yang, Liqiong; Luo, Pan; Chen, Hao; Wang, Kelin
Source:
Geoderma 2018 v.314 pp. 184-189
ISSN:
0016-7061
Subject:
dissolved organic nitrogen; mineralization; shrublands; cropland; nitrification; secondary forests; karsts; soil; ammonium; ecosystems; grasslands; nitrates; China
Abstract:
... Soil nitrogen (N) availability is crucial in governing the dynamics of ecosystem structure and function. However, the variation pattern of soil N availability during post-agricultural succession has been poorly understood for karst regions. Here, soil N availability variables, including concentrations of soil total N (TN), dissolved inorganic N (DIN=ammonium (NH4+)+nitrate (NO3−)), dissolved organ ...
DOI:
10.1016/j.geoderma.2017.11.018