Journal of Food, Agriculture and Environment

Effects of amendments on the availability of Cd in contaminated paddy soil: A three-year field experiment

Author(s):

Zhong-Xiu Rao ^{1, 2}, Dao-You Huang ¹, Qi-Hong Zhu ¹*, Shou-Long Liu ¹, Zun-Chang Luo ³, Xiao-Ling Cao ¹, Xue-Fei Ren ^{1, 2}, Ji-Yu Wang ¹, Shuai Wang ^{1, 2}

Recieved Date: 2013-06-13, Accepted Date: 2013-10-10

Abstract:

We conducted a three-year field trial to investigate the efficiency of lime, Ca-Mg-phosphate, sepiolite, lignite, lime mixed with Ca-Mg-phosphate (lime+Ca-Mg-phosphate), sepiolite (lime+sepiolite) and lignite (lime+lignite) to induce Cd immobilisation in a Cd-contaminated acidic paddy soil. Compared with the untreated control soil, treatment with the amendments induced 9.9-91.7%, 27.0-90.0% and 19.1-83.4% decreases in the soil NH₄NO₃-extractable Cd for the three tested years, respectively. In contrast, a significant decrease in the soil DTPA-extractable Cd (9.5-23.3%) was only observed in the first year after the applied amendments. Correspondingly, the concentrations of Cd in brown rice were decreased in the lime+sepiolite (34.4 and 33.0%) and lime+Ca-Mg-phosphate (19.9% and 34.1%) treatments for the first and third years, and the sepiolite (37.5%) and lime (20.7%) treatments also decreased the brown rice Cd content in the first year when compared to that of the control. Interestingly, the amendments did not influence the rice grain yield when compared to that of the control. Overall, the results of this study indicated that lime+sepiolite and lime+Ca-Mg-phosphate could be recommended for immobilising Cd in Cd-contaminated acidic paddy soil.

Keywords:

Cadmium, amendments, paddy soil, rice, field experiment

---

Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 2009-2014

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :