Assessment of microbial activity and biomass in different soils exposed to nicosulfuron
Određivanje mikrobiološke aktivnosti i biomase u različitim zemljištima nakon primene nikosulfurona
Pregled/ Otvaranje
Autor
Santric, Ljiljana
Radivojevic, Ljiljana
Gajic Umiljendic, Jelena
Djurovic-Pejcev, Rada
Saric-Krsmanovic, Marija
Ključne reči
SoilPhosphorus
Nicosulfuron
Microorganisms
Biomass
Zemljište
fosfor
nikosulfuron
mikroorganizmi
biomasa
Metadata
Prikaz svih podataka o dokumentuApstrakt
The effects of the herbicide nicosulfuron on the abundance of cellulolytic and proteolytic
microorganisms, activity of β-glucosidase and protease enzymes, and microbial phosphorus biomass
were examined. A laboratory bioassay was set up on two types of agricultural soils differing in
physicochemical properties. The following concentrations were tested: 0.3, 0.6, 3.0 and 30.0 mg
a.i./kg of soil. Samples were collected 3, 7, 14, 30 and 45 days after treatment with nicosulfuron.
The results showed that nicosulfuron significantly reduced the abundance of cellulolytic
microorganisms in both soils, as well as microbial biomass phosphorus in sandy loam soil.
The herbicide was found to stimulate β-glucosidase and protease activity in both types of
soil and microbial biomass phosphorus in loamy soil. Proteolytic microorganisms remained
unaffected by nicosulfuron. Ispitivan je uticaj herbicida nikosulfurona na brojnost celulolitskih i proteolitskih
mikroorganizama, aktivnost enzima β-glukozidaze i proteaze i mikrobiološku biomasu fosfora.
Ogled je postavljen u laboratorijskim uslovima na dva poljoprivredna zemljišta koja se razlikuju
po svojim fizičko-hemijskim karakteristikama. Primenjene su koncentracije od 0,3, 0,6, 3,0 i 30,0
mg a.s/kg zemljišta. Uzorci za analizu uzeti su 3, 7, 14, 30 i 45 dana nakon primene nikosulfurona.
Dobijeni rezultati su pokazali da je nikosulfuron značajno smanjio broj celulolizatora kod oba
tipa zemljišta, kao i vrednost mikrobiološke biomase fosfora u peskuši. Stimulativno delovanje
ovog herbicida zabeleženo je kod enzima β-glukozidaze i proteaze kod oba tipa zemljišta kao
i kod mikrobiološke biomase fosfora u ilovači. Na brojnost proteolitičkih mikroorganizama
nikosulfuron nije ispoljio nikakav uticaj.