GROUND PHOTOECLECTOR EVALUATION OF DIFFERENT ARTHROPOD GROUPS IN UNFERTILIZED, INORGANIC AND COMPOST-FERTILIZED CEREAL FIELDS IN EASTERN AUSTRIA

In 1991 and 1992, the arthropod fauna was sampled at different sites o f an organic rye field (nonfertilized plot: N, compost-fertilized plot : C) and in a nearby, inorganic fertilized field 1 (1991: wheat, 1997: rye) by ground photoeclectors. In comparison with N and I, the compos t-fertilized plot, C, showed increased emergence rates of most arthrop od groups in 1992, very likely due to the compost application in Autum n 1991. Especially, saprophagous groups like certain collembolans as w ell as the nematoceran families of sciarids, cecydomiids and chironomi ds occurred more abundantly in C than in I and N. Certain predator gro ups (e.g. Tachyporinae, Dolichopodidae and Hybotidae) as well as paras itoids (e.g. Aleocharinae) also emerged most numerously in C.