Microbiological parameters of soil set aside before and after desiccation

M. Nováková and K. Voříšek
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M. Nováková: Czech University of Agriculture in Prague, Czech Republic
K. Voříšek: Czech University of Agriculture in Prague, Czech Republic

Plant, Soil and Environment, 2006, vol. 52, issue 3, 97-104

Abstract: Herbaceous cover of luvic chernozem (seven years set aside) with legumes, perennial grasses and their mixture was desiccated by the glyphosate herbicide Roundup Biaktiv (5 l/ha at July 2003 and 4 l/ha at June 2004). 165 soil samples were collected before (November 2002-July 2003) and after desiccation (September 2003-August 2004). 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 (p < 0.01) was confirmed in the parameters: Corg, MBC and in the ratio MBC/Corg. At the same time the desiccation had a retardation effect on mineralization of Corg, Norg and Sorg. A significant decrease after desiccation (p < 0.01) was confirmed in the basal and potential respiration (with nitrogen, with nitrogen and glucose), actual content of N-NH4+ without and with pre-incubation, control ammonification, and (p < 0.05) in arylsulphatase activity. The actual content of NO3- and the control nitrification increased significantly (p < 0.01) after desiccation. Plots management before desiccation included black and spontaneous fallow, mulching (one or two per year) and cutting (three times per year), plots with 4 legumes, 4 grasses and their mixtures. Mulching variants showed the best results both before and after desiccation. The soils with cutting treatment ranked 8th-10th out of 11 studied combinations.

Keywords: land set aside; fallow; desiccation; Roundup Biaktiv; microbial biomass; K2SO4 extractable carbon; biological activity; respiration; nitrification; ammonification; arylsulphatase (search for similar items in EconPapers)
Date: 2006
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:52:y:2006:i:3:id:3352-pse

DOI: 10.17221/3352-PSE

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