The Effect of Liming on the Availability of Cadmium in Soils and Its Uptake in Cacao (Theobroma Cacao L.) In Trinidad & Tobago
Cadmium (Cd) is absorbed and bio-accumulated by cacao (Theobroma cacao L.) trees, resulting in unacceptably elevated levels in cocoa beans, necessitating measures to reduce its uptake from soils. A field experiment, lasting 18 months, was carried out to assess the effectiveness of liming on pH, bioavailability of Cd in soils and its uptake in cacao tissues. The treatments were: (a) control (untreated) and (b) lime-treated trees. Results demonstrated a significant (P < 0.05) increase in the soil pH (lime treated) and a natural fluctuation in pH for the control. For the lime-treated trees, bioavailable Cd levels generally stabilized with no significant change (P > 0.05) compared to the significant (P < 0.05) increase showed by control trees. The Cd levels in the leaves of both treatments decreased, however, the rate of decline in leaf Cd concentrations for lime-treated trees (−0.1378) was 3x faster than control (−0.0497) trees demonstrating the effectiveness of liming.
| Main Authors: | , , , , , , , |
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| Format: | Texto biblioteca |
| Language: | d |
| Published: |
Oxfordshire United Kingdom Taylor & Francis
2018
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| Subjects: | theobroma cacao, cadmium, contaminant, |
| Online Access: | https://drive.google.com/drive/folders/1IrXXTOrhJkuJwj8mYXXovdewOdIw9ZBt?usp=sharing |
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