Microbiological parameters of soil set aside before and after desiccation
Novakova, M.(Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Agrobiologie, Potravinovych a Prirodnich Zdroju) | Vorisek, K.E-mail:[email protected]
Herbaceous cover of luvic chernozem with legumes, perennial grasses and their mixture was desiccated by the glyphosate herbicide Roundup Biaktiv. Desiccation had a strong positive effect on immobilization of organic carbon from herbaceous cover and underground biomass to microbial biomass carbon (MBC) and to soil organic carbon (Corg), respectively. A significant increase after desiccation was confirmed in Corg, MBC and in the ratio MBC/Corg. The desiccation had a retardation effect on mineralization of Corg, Norg and Sorg. Basal and potential respiration, actual content of N-NH4+, control ammonification, and arylsulphatase activity decreased significantly, whereas NO3- concentration and nitrification increased. Plots management before desiccation included black and spontaneous fallow, mulching and cutting. Mulching variants showed the best results both before and after desiccation.
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