Sokoine University of Agriculture

Influence of farm yard manure, poultry manure and forest litter on copper solubility in soil and uptake by Phaseohrs vulgaris

Show simple item record Senkondo, Y. H. Tack, F. M. G. Semu, E. 2016-12-16T16:32:33Z 2016-12-16T16:32:33Z 2014-12
dc.identifier.issn 0266-0032
dc.description Soil Use and Management, December 2014, Vol. 30, page 480-486 en_US
dc.description.abstract Long term and intensive use of copper-based fungicides on coffee farms may contaminate soils with copper. The legacy of copper pollution may pose the risk of contaminating food crops cultivated on these soils. A randomized block design field experiment at Kilimanjaro, Tanzania was designed to investigate the effects of different application rates of cattle manure, poultry manure and forest litter on aqua regia, EDTA and CaC12 extractable copper in soils and copper uptake by bean plants grown on this long-term copper-contaminated soil (more than 50 yr of copper application). It was important to examine the potential of the organic amendments in mobilizing or immobilizing copper and assess the risks of contaminating bean crops at a farm, where the application of organic amendments was common practice. At harvest, rhizosphere soils were collected and analysed. The soils were found to have large concentrations of copper, greatly exceeding international standard levels. Poultry manure applied at 40 tons/ha significantly increased CaC12 extractable copper compared with the control treatment. Organic carbon, cation exchange capacity, EDTA extractable copper, aqua regia extractable copper and copper concentrations in bean seeds or leaves were not significantly changed by the organic matter treatments. The concentration of copper was significantly less in bean seeds than in bean leaves (P < 0.01). The bean plants did not take up excessive quantities of copper, and therefore, the risk of copper contamination of bean crops in this farm appears to be small. en_US
dc.language.iso en en_US
dc.publisher British Society of Soil Science en_US
dc.subject Soil contamination en_US
dc.subject Fungicides en_US
dc.subject Concentrations en_US
dc.subject Phaseohrs vulgaris en_US
dc.subject Copper solubility en_US
dc.title Influence of farm yard manure, poultry manure and forest litter on copper solubility in soil and uptake by Phaseohrs vulgaris en_US
dc.type Article en_US

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