Spatial regression modeling of soils with high cadmium content in a cocoa producing area of Central Colombia
Cadmium (Cd) is a highly toxic heavy metal that can cause harmful effects in soils, plants, micro-organisms and human beings. Plants absorb Cd from available forms in the soil. In cocoa crops of Latin America, higher levels of Cd than those allowed by international regulations on processed foods frequently have been reported. Consequently, close monitoring of such crops is required in order to guarantee the innocuousness of cocoa products. Using data from an existing study done in a cocoa producing area of central Colombia, we selected several farms with high Cd concentration, and in these farms we studied the spatial variability of Cd in soil and plant tissues, along with other soil chemical properties. At increased soil depths there was a reduction in total Cd as well as in available levels of the element. Additionally, we found that Cd contents in cocoa beans can be modeled through a spatial regression model using the explanatory variables measured up to 30 cm and 100 cm of soil depths, aswell as a weighted depth that collected information from the two depths, namely Cd in leaves, leaf litter, total and available, aswell as the soil pH. In theweighted depth we found a clear relationship between the Cd in the cocoa almonds and the explanatory variables being considered.
| Main Authors: | , , |
|---|---|
| Format: | Texto biblioteca |
| Language: | | 0 |
| Published: |
Amsterdam, Netherlands Elsevier
2019
|
| Subjects: | Theobroma cacao, Cadmium, Soil, |
| Online Access: | https://drive.google.com/drive/folders/17WfeGXcyX_DZlrc3XOhgp5Wnet0urFaN?usp=sharing |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Cadmium (Cd) is a highly toxic heavy metal that can cause harmful effects in soils, plants, micro-organisms and
human beings. Plants absorb Cd from available forms in the soil. In cocoa crops of Latin America, higher levels of
Cd than those allowed by international regulations on processed foods frequently have been reported. Consequently,
close monitoring of such crops is required in order to guarantee the innocuousness of cocoa products.
Using data from an existing study done in a cocoa producing area of central Colombia, we selected several
farms with high Cd concentration, and in these farms we studied the spatial variability of Cd in soil and plant tissues,
along with other soil chemical properties. At increased soil depths there was a reduction in total Cd as well
as in available levels of the element. Additionally, we found that Cd contents in cocoa beans can be modeled
through a spatial regression model using the explanatory variables measured up to 30 cm and 100 cm of soil
depths, aswell as a weighted depth that collected information from the two depths, namely Cd in leaves, leaf litter,
total and available, aswell as the soil pH. In theweighted depth we found a clear relationship between the Cd
in the cocoa almonds and the explanatory variables being considered. |
|---|