Abstract— Different biotic and abiotic factors are involved in the availability of heavy metals in soil including organic matter. In order to study the effects of cow manure on cadmium availability and their interactions on common bean nodulation and growth parameters, an experiment was conducted under greenhouse conditions. The treatments included five cadmium levels (0, 2, 5, 10, 20 mg cadmium per kg soil) and four cow manure levels (0, 15, 30, 60 t ha-1) based on a completely randomized design with three replications. Results indicated that increased soil cadmium concentrations caused higher cadmium uptake by root tissues whereas, Root nodulation and total N content of shoot tissues decreased significantly at all cadmium concentration levels except for 2 mg Kg-1. In addition, the interaction of cow manure and high concentrations of cadmium caused a decrease in nodule number, nodule fresh weights and total N content of shoot in common bean.
Keywords— cadmium, common bean, cow manure, nitrogen, nodulation.
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