Inter-relationship between number of microorganisms and spring barley yield and degree of soil contamination with copper
Kucharski, J.(University of Warmia and Mazury, Olsztyn (Poland). Dept. of Microbiology)E-mail:[email protected] | Wyszkowska, J.(University of Warmia and Mazury, Olsztyn (Poland). Dept. of Microbiology)
The aim of this study was to evaluate the effect of soil contamination with copper on the number of soil microorganisms and spring barley yield and to assess whether spores of Streptomyces odorifer and Streptomyces viridis were used for detoxification of Cu polluted soils. The tests were performed in a pot experiment which was conducted on two types of soil: Eutric Cambisol soil derived from light loamy sand and Eutric Cambisol soil derived from light loam. The results showed that the number of microorganisms was significantly negatively correlated with the degree of soil contamination, but positively correlated with the yield of spring barley. In general, the adverse impact of Cu on the development of oligotrophic bacteria and their spores, eutrophic bacteria and their spores as well as actinomycetes and fungi was much weaker in more compact (light loam) than lighter (light loamy sand) soil. Cu had a strong toxic effect on spring barley and significantly inhibited the growth and development of the plants. An inoculum containing spores of Streptomyces viridis and Streptomyces odorifer did not alleviate the negative response of spring barley to Cu contamination of soil, although it had positive influence on the growth of some microorganisms.
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