Untitled - MendelNet 2013 - Mendelova zemědělská a lesnická ...

MENDELNET 2013DISTRIBUTION OF BARLEY ROOT BIOMASS IN SOIL PROFILEKlimešová J., Středa T.Department of Crop Science, Breeding and Plant Medicine, Faculty of Agronomy,Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech RepublicE-mail: jana.klimesova@mendelu.czABSTRACTIn 2010 and 2011 was realized a field trial with selected varieties of barley in two localities,Hrubčice and Želešice. In five varieties root system size, its distribution in soil profile layers within60 cms of depth and grain yield were evaluated. The impact of locality, year and variety on rootsystem attributes was quantified. The amount of root biomass was always influenced significantlyby year (up to 43.5%), locality (up to 19.5%) and their mutual interaction. The impact of thesefactors differed according to the depth of soil profile. In deeper depths the effect of variety alsodeveloped. In 2011 statistically significantly higher values of root length density (RLD) wereidentified in all localities. In shallow layers of soil plants produced more roots in Želešice. Highestvalues of RLD were determined in the layer of 0 to 10 cm. Tendency to increase RLD in bothlocalities and most varieties in layer of 40 to 60 cm were detected. A significant dependency ofgrain yield on RLD was only determined in middle layers of the soil profile. In wet year of 2010 asignificant negative correlation was determined. A positive relation was recorded in 2011.Key words: barley, root length density, root system, yield, soil profileAcknowledgments: This work was supported by project No. QI111C080.69 | P age