The effect of seed treatments on the germination of defferent fabaceae species of a natural meadow-like association

The goal of our experiment is to compose a species-rich seed mixture suitable for soil covering in orchard floor management in organic fruit production systems. Besides selection of traditionally used grass and Fabaceae species we are focusing on the involvement of local fora elements, of the experiment site, approaching a natural meadow-like association. Species of the following plant families are involved: Apiaceae, Asteraceae, Rosaceae, Linaceae, Polygonaceae, Dipsacaceae, Fabaceae, Poaceae. Seeds of selected species were tested to determine germination % before seeding, according to MSZ 6354-3:2008 standard in climate cabinet. Seed treatments (vernalisation, scarification) were carried out according to relevant standard. There were differences in the germination% of commercial and wild collected seed items of Agrimonia eupatoria L, Ajuga genevensis L, Lotus corniculatus L, and Achillea millefolium L. The applied seed treatments resulted significant difference between the treated and non-treated seed items most of the tested species related their germination%. For example in case of Anthyllis vulneraria L it was effective. Scarification was effective for commercial hard seed species like Lotus corniculatus L in our case, but it was not effective for Agrimonia eupatoria L. The aim of the treatments was to select those species which can be seed in the same time, will be easier applied to soil and climatic condition of the experiment site and to determine effect of pre-treatments on germination % of seeds of tested species

Agroforestry research and development in Hungary

PosterHungary is a traditionally agricultural country, therefore the „old” agroforestry technologies (windbreaks, shelter-belts, hedgerows, wooded pastures) had been applied in large scale in the past centuries. From the early nineties the positive trend of increasing area of protective forest belts first stopped, then reversed. The former area of forest belts (35 000 hectares) has decreased by 50% up to this time. The high ratio of “risky” territories demonstrates the strong need for the development of rural areas, by eg. the implementation of innovative agricultural technology able to increase social-economic sustainability. Followed from the forest belt research project started in the ’60s and ran over the course of several decades, a new line of experiments has started some years ago in the UWH Faculty of Forestry with the aim to develop a modell for the design and construction of forest belts by the combination of digital modelling and field sampling with analytical methods. The examination and development of windbreaks and shelter belt system will be continued within the frame of a national project focused on climate – vegetation relationship. In 2012 the UWH Cooperational Research Centre, together with local cooperatives and farmers have set the objective of integrating modern agroforestry technologies in their on-farm agricultural activity and establishing new experimental sites available for future research and demonstration purposes. This cooperation will also contribute to the „AGFORWARD” international research project on agroforestry. In the Corvinus University of Budapest, Department of Ecological Farming and Sustainable Production Systems an R&D project on forest gardens started in 2010. From this year agroforestry appears among the “determinative research and development subjects” of the Ministry of Rural Development. This development and the increasing number of research projects show agroforestry rising again in Hungary

Comparison of soil erosion dynamics under extensive and intensive cultivation based on basic soil parameters

The conservation of soil and its elemental feature, t he soil fertility has not just national and agricultural business interest, since the fertile soil is an elemental part of the material turnover in the environment. The soil erosion can reach huge spatial e xtensions and starts with the most valuable part: the upper, fertile layer. So, its research is crucial for our future survival. Our studied area can be found in Gerézdpuszta at the Koppány -valley of Hungary, which is a sensitive erosion area. We sampled the upper 30 cm of soil layer in every 10 meters that resulted 32-32 point samples on the arable and on the grassland, respectively. One sample was taken under the forest as r eference. We analyzed the basic soil parameters: CaCO 3 , pH, AL-P 2 O 5 , AL-K 2 O, Kuron’s higroscopicity, SOM and the particle size di stribution was determined. Besides, we examined the connection between the given results from laboratory soil analyses and the Munsell-type and Google Earth satellite image colors. O ur results show the erosion dynamic on our sample slope, and the main differences in basic soil paramet ers between different intensities. The main indicator of soil erosion dynamic were the CaCO 3 , the SOM, AL-P 2 O 5 and the particle size distribution, where the SOM and CaCO 3 were correlate with the Munsell and Google Earth col or also

Az ifjúság - élet, erő, egészség…? Néhány adalék a fiatalok életmódjáról és egészségi állapotáról

Tanulmányukban a szerzők arra keresik a választ, hogy mekkorák a fiatalok indulási esélyei a korábbi nemzedékekéhez képest. Állításuk szerint a fiatalok életfeltételei, munkájuk körülményei és kényszerei, pályakezdésük, családalapítási, lakásszerzési lehetőségeik és megélhetési nehézségeik határozzák meg az életmód mikéntjére vonatkozó választási lehetőségeiket

Segregation of granular binary mixtures by a ratchet mechanism

We report on a segregation scheme for granular binary mixtures, where the segregation is performed by a ratchet mechanism realized by a vertically shaken asymmetric sawtooth-shaped base in a quasi-two-dimensional box. We have studied this system by computer simulations and found that most binary mixtures can be segregated using an appropriately chosen ratchet, even when the particles in the two components have the same size, and differ only in their normal restitution coefficient or friction coefficient. These results suggest that the components of otherwise non-segregating granular mixtures may be separated using our method.Comment: revtex, 4 pages, 4 figures, submitte

Exploring the circumstellar environment of the young eruptive star V2492 Cyg

Context. V2492 Cyg is a young eruptive star that went into outburst in 2010. The near-infrared color changes observed since the outburst peak suggest that the source belongs to a newly defined sub-class of young eruptive stars, where time-dependent accretion and variable line-of-sight extinction play a combined role in the flux changes. Aims. In order to learn about the origin of the light variations and to explore the circumstellar and interstellar environment of V2492 Cyg, we monitored the source at ten different wavelengths, between 0.55 \mu m and 2.2 \mu m from the ground and between 3.6 \mu m and 160 \mu m from space. Methods. We analyze the light curves and study the color-color diagrams via comparison with the standard reddening path. We examine the structure of the molecular cloud hosting V2492 Cyg by computing temperature and optical depth maps from the far-infrared data. Results. We find that the shapes of the light curves at different wavelengths are strictly self-similar and that the observed variability is related to a single physical process, most likely variable extinction. We suggest that the central source is episodically occulted by a dense dust cloud in the inner disk, and, based on the invariability of the far-infrared fluxes, we propose that it is a long-lived rather than a transient structure. In some respects, V2492 Cyg can be regarded as a young, embedded analog of UX Orionis-type stars. Conclusions. The example of V2492 Cyg demonstrates that the light variations of young eruptive stars are not exclusively related to changing accretion. The variability provided information on an azimuthally asymmetric structural element in the inner disk. Such an asymmetric density distribution in the terrestrial zone may also have consequences for the initial conditions of planet formation.Comment: 9 pages, 7 figures, 2 online tables, accepted for publication in A&