Efekat metribuzina na broj proteolitičkih mikroorganizama i proteolitičku aktivnost različitih tipova zemljišta

  • Ljiljana R Šantrić Institut za pesticide i zaštitu životne sredine, Banatska 31b,11080 Beograd
  • Ljiljana Radivojević Institut za pesticide i zaštitu životne sredine, Banatska 31b,11080 Beograd
  • Marija Sarić-Krsmanović Institut za pesticide i zaštitu životne sredine, Banatska 31b,11080 Beograd
  • Jelena Gajić Umiljendić Institut za pesticide i zaštitu životne sredine, Banatska 31b,11080 Beograd
  • Rada Đurović-Pejčev Institut za pesticide i zaštitu životne sredine, Banatska 31b,11080 Beograd
Ključne reči: Metribuzin||, ||Metribuzin, Soil||, ||Zemljište, Proteolytic microorganisms||, ||Proteolitički mikroorganizmi, Protease||, ||Proteaza,

Sažetak


Tekstura zemljišta i druge fizičke i hemijske karakteristike zemljišta predstavljaju važne
faktore koji utiču na zadržavanje herbicida u zemljišnim ekosistemima. Postavljen je laboratorijski ogled da bi se procenio odgovor proteolitičkih mikroorganizama i aktivnosti proteaze na primenu metribuzina u različitim tipovima zemljišta (ilovača i peskuša). Ispitivane su sledeće koncentracije. 12,0, 24,0; 120,0 i 1200,0 mg a.s. kg-1zemljišta. Uzorci su uzeti 7, 14 i 30 dana nakon primene metribuzina.


Metribuzin nije uticao na broj proteolitičkih mikroorganizama u ilovači. U peskuši broj je
smanjen za 26,7% sedam dana nakon primene najveće koncentracije. Aktivnost proteaze bila je smanjena u oba tipa zemljišta sedmog i četrnaestog dana, u ilovači procenat smanjenja je iznosio 21% a u peskuši 29,9%. Statistička analiza podataka je pokazala da je korelacioni odnos između ispitivanih parametara bio pozitivan za oba tipa zemljišta (za ilovaču r2=1; za peskušu r2=0,81). Ispitivanja su pokazala da je metribuzin imao prolazni uticaj na mikrobiološku populaciju i enzimatsku aktivnost i zavisio je od tipa zemljišta.

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Objavljeno
2018/12/29
Kako citirati
Šantrić, L. R., Radivojević, L., Sarić-Krsmanović, M., Gajić Umiljendić, J., & Đurović-Pejčev, R. (2018). Efekat metribuzina na broj proteolitičkih mikroorganizama i proteolitičku aktivnost različitih tipova zemljišta. Pesticides and Phytomedicine / Pesticidi I Fitomedicina, 33(3-4). https://doi.org/10.2298/
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