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Critical Toxic Concentration of Cadmium in African Marigold Grown in Typic Ustochrept Soil


Affiliations
1 Department of Soil Science and Agricultural Chemistry, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, India
2 National Bureau of Soil Survey & Land Use Planning (ICAR), Amravati Road, Nagpur-440 033, India
 

Heavy metals are potentially toxic to human life and the environment. In a greenhouse pot experiment, Typic Ustochrepts soil order (alluvial soil) with pH 5.7 was used. African marigold variety Pusa Narangi was used as a test crop. The soil was artificially spiked with different cadmium (Cd) levels (0, 5, 10, 25, 50 and 100 mg kg-1). Critical toxic concentrations of Cd resulting in 25 per cent reduction in dry matter yield were established for African marigold grown in alluvial soil. The corresponding values for non-inoculated, arbuscular mycorrhiza (Glomus moseae) and phosphorus solubilizing fungi (Aspergillus awamori) treated soils, respectively, were 28, 24 and 16 mg kg-1 Cd applied in soil; 12, 12 and 8 mg kg-1 AB-DTPA extractable Cd in soil; 6.4, 6.2 and 6 mg kg-1 Cd content in plant tissues.

Keywords

African Marigold, Cadmium, Critical Toxic Concentration, Dry Matter Yield.
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  • Critical Toxic Concentration of Cadmium in African Marigold Grown in Typic Ustochrept Soil

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Authors

Asha Sahu
Department of Soil Science and Agricultural Chemistry, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, India
Nisha Sahu
National Bureau of Soil Survey & Land Use Planning (ICAR), Amravati Road, Nagpur-440 033, India

Abstract


Heavy metals are potentially toxic to human life and the environment. In a greenhouse pot experiment, Typic Ustochrepts soil order (alluvial soil) with pH 5.7 was used. African marigold variety Pusa Narangi was used as a test crop. The soil was artificially spiked with different cadmium (Cd) levels (0, 5, 10, 25, 50 and 100 mg kg-1). Critical toxic concentrations of Cd resulting in 25 per cent reduction in dry matter yield were established for African marigold grown in alluvial soil. The corresponding values for non-inoculated, arbuscular mycorrhiza (Glomus moseae) and phosphorus solubilizing fungi (Aspergillus awamori) treated soils, respectively, were 28, 24 and 16 mg kg-1 Cd applied in soil; 12, 12 and 8 mg kg-1 AB-DTPA extractable Cd in soil; 6.4, 6.2 and 6 mg kg-1 Cd content in plant tissues.

Keywords


African Marigold, Cadmium, Critical Toxic Concentration, Dry Matter Yield.

References