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Kovar P.,Katedra Travnych Ekosystemov A Krmnych Plodin | Vozar L.,Katedra Travnych Ekosystemov A Krmnych Plodin | Jancovic J.,Katedra Travnych Ekosystemov A Krmnych Plodin
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis | Year: 2012

The development of botanical composition (in % dominance) in the period 2005-2011 and growth-production process in the years 2007-2011 were evaluated in small-plots experiment with selected Slovak varieties of species of the genus Festuca. The experiment was realized under the conditions without irrigation of south-western Slovakia (locality Nitra). The data of botanical composition of turfs showed that fescue varieties were able to create well-covered vegetation (coverage 87-99 %) as early as next year after sowing in conditions without irrigation. In the next period, the differences in turf coverage between varieties were minimized. The total height of turf and average daily gain of height were the highest in F. arundinacea Schreb. varieties throughout the observed period with significant differences in year 2008 (p = 0.0239), 2009 (p = 0.0462) and 2011 (p = 0.0036). The most intensive growth had F. arundinacea Schreb. cv. Koreta (1.81 to 3.44 mm.d-1; i.e. very low to moderate intensity of growth). From point of view of aboveground phytomass production almost throughout the period were used varieties characterized by very low production of phytomass. Among years and varieties were observed differences in the ability thicken vegetation expressed as the ratio of the average daily gain of weight and average daily gain of height (W/H). F. rubra L. cv. Laroma (0.38 to 1.26 g.m-2.mm-1) and F. ovina L. cv. Grasina (0.37 to 1.54 g.m-2.mm-1) dominated in this indicator except for 2009, when higher values reached F. arundinacea Schreb. cv. Koreta and Levona (both 0.43 g.m-2.mm-1; F. rubra L. and F. ovina L. - 0.27 and 0.39 g.m-2.mm-1, respectively).


Jancovic J.,Katedra Travnych Ekosystemov A Krmnych Plodin | Vozar L'.,Katedra Travnych Ekosystemov A Krmnych Plodin | Bacova S.,Katedra Travnych Ekosystemov A Krmnych Plodin | Kovar P.,Katedra Travnych Ekosystemov A Krmnych Plodin
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis | Year: 2012

On the grassland (association Lolio-Cynosuretum cristati R. 1937) with brown acidic soil (cambisol) the basic agrochemical properties (pH, Cox, Nt, P, K) was studied during the years 1986-2006. Various systems of management (fertilizing + cutting, liming, no management) had different influences to the cambisol qualities, but had not so significant effect. The pH of the soil decreased after application of mineral fertilization and also in the period without anthropogenic interference. The balanced content of oxidizable carbon (Cox) preserved during the experimental period. The total nitrogen content (Nt) increased in the period of fertilization and the aftermath of fertilization. The content of phosphorus (P) decreased significantly in the years of fertilization and this trend continued after the absence of fertilization too. The content of potassium (K) decreased in the period of fertilization, except for a variant with PK nutrition. The content of potassium (K) increased on the all variants in both sampling depths of almost 1.5-fold after a period without management. We found a significant effect of year and depth of soil sampling for most of soil parameters. Variants had not significant impact on all evaluated soil characteristics. Between the years there was relatively great variability at the available nutrients values (8-75 %). The available phosphorus had greatest variability (19-96 %) and also potassium (18-82 %). Medium till small variability was characteristic for pH (9-14 %), Cox (17-19 %) and Nt (8-16 %). The results are indicating that changes of management systems mean not automatically changes of soil features.

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