Infl uence of the Organic Fertilizer Condit on the Content of Heavy Metals and Soil Chemical Properties

Eff ect of amendment Condit on the mobility and uptake of Cd, Pb and Ni by crops, such as peas, spring barley, carrot and red beet, and selected chemical soil properties was tested in a fi eld trial in years 2006–2008. Experimental fi eld was situated close by sources of pollution, chemical factory Chemko Str??ske and waste dump. Th e soil at experimental area was highly contaminated mainly by Cd. Heavy metals content was tested in the following parts of the crops: pea seed, spring barley green mater, carrot root and red beet root. Heavy metals content in soil and plant samples was detected in 2M HNO3 solution by the AAS method. It was found that Condit reduced Cd content in the soil under each cultivated crop. Th e most considerable Cd reducing (77.2%) was at treatment with pea. Th e reduction of Pb and Ni content in the soil aft er Condit application was markedly lower as in the case of Cd, in comparison with control treatment. Positive eff ect of tested amendment Condit on reduction of Cd uptake was found by all crops under test. Th e best eff ect of Condit was found in carrot. Content of Cd in the carrot root was lower for about 55% compared with control treatment without amendment. Soil organic carbon content was signifi cantly higher at treatment with Condit in comparison with control treatment. Measured content of soil organic carbon was higher by 1.16 g kg-1. Th e changes of soil carbon were insignifi cant at control treatment. Tested amendment Condit had signifi cant impact on uptake of all measured heavy metals by plants. Th e result suggests that most signifi cant impact had Condit on uptake of Cd. Th e measured amounts were the lowest of evaluated heavy metals.