The influence of soil treatment by untreated and composted tannery sludge on yield, nutrient status, and chromium content in selected crops
Gondek, K.(H. Kollataj Agricultural Univ. of Cracow (Poland). Dept. of Agricultural Chemistry)E-mail:[email protected]
Millet, white mustard, maize, sunflower, and spring triticale were used to test the effect of farmyard manure, mineral fertilization, sewage sludge, compost, and vermicompost on the yields, macroelement and chromium concentrations in the biomass in pot experiments carried out during several consecutive yields. The biggest differences in yield were observed in the two first years. The plants differed in their ability to utilize nutrients and to tolerate Cr. The influence of crop succession was also observed. N concentrations in plants differed, despite the same level of supplementation in all treatments. P and Mg conc. depended on the plant species and fertilization. K was more available if applied in a mineral form, whereas Ca and Na conc. increased significantly in the plant biomass fertilized with tannery sludge. Cr conc. in tannery materials did not affect Cr conc. in plant aerial parts as Cr was retained mainly in the roots.
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