Featured Research

from universities, journals, and other organizations

Predicting bioavailable cadmium levels in soils

Date:
April 15, 2014
Source:
American Society of Agronomy (ASA), Crop Science Society of America (CSSA), Soil Science Society of
Summary:
Soil pH and iron levels predict cadmium bioavailability, and offers solutions to farmers and ranchers, a new study concludes. Many of the country's pasture soils have become enriched in cadmium. Grasses take up this toxic heavy metal, which is then eaten by the cattle and sheep that graze them. The concern is that if cadmium concentrations rise to unsafe levels in meat and dairy products, human health and New Zealand's agricultural economy could be jeopardized.

New Zealand's pastoral landscapes are some of the loveliest in the world, but they also contain a hidden threat. Many of the country's pasture soils have become enriched in cadmium. Grasses take up this toxic heavy metal, which is then eaten by the cattle and sheep that graze them. The concern is that if cadmium concentrations rise to unsafe levels in meat and dairy products, human health and New Zealand's agricultural economy could be jeopardized. That so far hasn't happened.

Related Articles


But, New Zealand isn't taking any chances. Brett Robinson, a scientist with New Zealand's Lincoln University, recently published an article in the Mar. 21, 2014 edition of the Journal of Environmental Quality that gives some solutions to the problem.

The use of phosphate fertilizers over many decades -- contaminated with cadmium -- created the current conditions. These practices continue today. Robinson and his team are trying to determine which soil factors most strongly affect soil cadmium concentrations. They found that soil pH, iron concentrations and total cadmium levels were excellent predictors of how much cadmium is biologically available for plants.

Robinson's work also shows ways to keep the cadmium from being taken up by plants. His research showed that more acidic soils increased the cadmium that is available to plants. So, using lime to prevent soil acidification could help "lock" the cadmium in the soil.

Similarly, iron oxides bind cadmium tightly and hold it in soil. Robinson is working with the coal-mining company, Solid Energy New Zealand, and the Swiss Federal Institute of Technology to determine whether certain soil amendments will reduce plant uptake of cadmium. Robinson's research can also be applied worldwide to help with cadmium contamination.


Story Source:

The above story is based on materials provided by American Society of Agronomy (ASA), Crop Science Society of America (CSSA), Soil Science Society of. Note: Materials may be edited for content and length.


Journal Reference:

  1. Renι Reiser, Michael Simmler, Denise Portmann, Lynne Clucas, Rainer Schulin, Brett Robinson. Cadmium Concentrations in New Zealand Pastures: Relationships to Soil and Climate Variables. Journal of Environment Quality, 2014; 0 (0): 0 DOI: 10.2134/jeq2013.09.0367

Cite This Page:

American Society of Agronomy (ASA), Crop Science Society of America (CSSA), Soil Science Society of. "Predicting bioavailable cadmium levels in soils." ScienceDaily. ScienceDaily, 15 April 2014. <www.sciencedaily.com/releases/2014/04/140415111312.htm>.
American Society of Agronomy (ASA), Crop Science Society of America (CSSA), Soil Science Society of. (2014, April 15). Predicting bioavailable cadmium levels in soils. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2014/04/140415111312.htm
American Society of Agronomy (ASA), Crop Science Society of America (CSSA), Soil Science Society of. "Predicting bioavailable cadmium levels in soils." ScienceDaily. www.sciencedaily.com/releases/2014/04/140415111312.htm (accessed November 28, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Friday, November 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Research on Bats Could Help Develop Drugs Against Ebola

Research on Bats Could Help Develop Drugs Against Ebola

AFP (Nov. 28, 2014) — In Africa's only biosafety level 4 laboratory, scientists have been carrying out experiments on bats to understand how virus like Ebola are being transmitted, and how some of them resist to it. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
New Dinosaur Species Found in Museum Collection

New Dinosaur Species Found in Museum Collection

Reuters - Innovations Video Online (Nov. 27, 2014) — A British palaeontologist has discovered a new species of dinosaur while studying fossils in a Canadian museum. Pentaceratops aquilonius was related to Triceratops and lived at the end of the Cretaceous Period, around 75 million years ago. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Tryptophan Isn't Making You Sleepy On Thanksgiving

Tryptophan Isn't Making You Sleepy On Thanksgiving

Newsy (Nov. 27, 2014) — Tryptophan, a chemical found naturally in turkey meat, gets blamed for sleepiness after Thanksgiving meals. But science points to other culprits. Video provided by Newsy
Powered by NewsLook.com
Classic Hollywood Memorabilia Goes Under the Hammer

Classic Hollywood Memorabilia Goes Under the Hammer

Reuters - Entertainment Video Online (Nov. 26, 2014) — The iconic piano from "Casablanca" and the Cowardly Lion suit from "The Wizard of Oz" fetch millions at auction. Sara Hemrajani reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins