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• Evolution of some components of agroecosystems productivity from Vinga Plain in water stress situations

  174-179

  Daniel Dicu

  Iacob Borza

  Dorin Tarau

  Views:

  60

  The researches are inscribed on line of substantiation of durable agricultural system, having main objective the prominence of
  quantitative and qualitative modifications made on agro-system level under the effect of no-tillage system for wheat, maize and soybeans.
  The experimental field is placed on a cambium chernozem, with a medium content of clay, dominant in the Prodagro West Arad agrocentre
  and representative for a large surface in the Banat-Crisana Plain.
  The passing to no-till system change the structure of technological elements, through less soil works, so the impact on agro-system is
  different comparing with conventional tillage, first less the intervention pressure on agro-system ant secondly appears new interactions, new
  equilibriums and disequilibriums.
  Considering the evolution of soil humidity, the observations made monthly (by taking soil samples and laboratory determinations) for
  the three cultures showed that in the no-till system, there are more uniform values in the soil profile, and in the variants where the deep work
  of soil was made it could be observed a low increase of the water volume in the soil.

• The system of faunacomponents conception and its application to qualify the degree of naturalness of fish assemblages

  93-101

  Péter Sály

  Views:

  63

  The increase of species richness in communities of natural biogeographic regions in an anthropogenic way can be expressed as biogeographic pollution. Where there is contaminated fauna, one must investigate how this occured. I studied how the members of Hungarian fishfauna could be present resident and have managed to workout a so-called system of fauna component conception which is suitable for this requirement.
  The expression of ’faunacomponent’ includes other expressions. That kind of species belong to a certain faunacomponent that reached the studied area in the same way. Species reached the studied area without an anthropogenious contribution are qualified as native fauna components. These kind of species are endemic species, occasional species and settlers. In contrast to native faunacomponents, some kind of human influence is always detectable in connection with the way reached the studied area by non-native species. Accordingly, group of non-native species includes directly or indirectly facilitated settlers, species that are introduced accidentally and those introduced intentionally. It is obvious that classifying a given species could be construed solely in connection with a certain area.
  Applying Shannon diversity index I have initiated the assemblage natural index (ANI) in order to show a way how to use the system of faunacomponent conception in practice. ANI refers to the degree of naturalness of faunistical samples. If ANI > 1 it means there are not any non-native species and ANI < 1 it means there are some non-native species in the sample respectively. In the latter case ANI decreases proportionally with the number of non-native species and specimens. In that special case when only one specimen of only one non-native species can be found in the faunistical sample ANI = 1.

• Effects of Cropping Year and Artificial Fertilization on Alveographic Quality of GK Öthalom Winter Wheat Variety

  126-133

  Árpád Tóth

  Péter Sipos

  Győri Zoltán

  Views:

  90

  Qualification of winter wheat became more complex for Hungary, after the expansion of the EU. Use of Chopin alveograph is a general method in Western- and Southern Europe. This method is not traditional in Hungary, so determination of alveographic properties of Hungarian winter wheat varieties is very important. Artificial fertilization is one very important component of applied agricultural engineering, which effects winter wheat quality. The another factor is the weather or rather the cropping year, which effects winter wheat quality too. We examined both of them and the alveographic quality of GK Öthalom winter wheat variety between 1996 and 2003.
  We found that cropping year has significant effect on the alveographic quality of GK Öthalom winter wheat variety on each treatment of artificial fertilization. We found no connection between quantities of precipitations of vegetation periods and the W values of GK Öthalom.
  We found a strong connection in 1999 and 2003 as well as a very strong connection in 1996, 1997 and 2002, between the increase of fertilizer dose and W values of GK Öthalom. Treatments of artificial fertilization had a significant effect to W values of GK Öthalom in 2001 and 2002. The differences between the two methods are because of large standard deviation of the results.

• Quality analysis of the near-infrared spectra of wheat samples

  97-100

  Éva Kónya

  Géza Kovács

  Zoltán Győri

  Views:

  120

  The near infrared spectroscopy is widely used in the different industries as a rapid, non-invasive analitical tool. It is suitable for identification, qualification and quantitative analysis as well. As this technique is indirect, to make accurate calibration equations we need a proper sample population. Before the quantitaive analysis, developing calibiration modells we have to collect and examine the spectra. In our study we examined wheat samples with known origins to find if there is any effect of the growing area on the NIR spectra.